{
  "data": {
    "a": {
      "slug": "nace-drex",
      "name": "Drex 1.5",
      "vendor": "Nace AI, Inc. (Nace.AI)",
      "vendorUrl": "https://www.nace.ai",
      "kind": "model",
      "category": "decision-models",
      "summary": "Drex 1.5 is Nace.AI's decision model. It returns a probability for each option in typed yes or no, choice and score questions. Hosted at console.nace.ai, with open weights under the Nace AI Open RAIL-M licence.",
      "url": "https://www.anchorterminal.com/tools/nace-drex",
      "markdownUrl": "https://www.anchorterminal.com/tools/nace-drex.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/nace-drex.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/nace-drex.json",
      "repo": "https://huggingface.co/nace-ai/drex-v1.5",
      "license": "Hosted API under the Nace AI Terms of Service, last updated 5 May 2026. Weights under the Nace AI Open RAIL-M licence (modified, version 1.0, October 2026), which is not an open-source licence. Businesses above $1 million in revenue or funding need a separate commercial licence, and competing products are excluded. The bundled code/kev package, derived from Jared Palmer's Kev (https://github.com/jaredpalmer/kev), and the GitHub repository are Apache-2.0, and the agent skill is MIT.",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://console.nace.ai/v1/systemone",
      "packages": [
        {
          "registry": "pypi",
          "name": "nace-sdk"
        },
        {
          "registry": "npm",
          "name": "nace-sdk"
        },
        {
          "registry": "pypi",
          "name": "nace-mcp"
        }
      ],
      "auth": "api-key",
      "authNotes": "A key starting nace_sk_, created in the Console dashboard after an emailed-code sign-in and sent as a Bearer header. The key is shown once. An account can hold three active keys, which share its credit and rate limits. Keys can be revoked and rotated, and no scopes are documented. An agent cannot create its own account, because sign-in needs an emailed code.",
      "pricing": "freemium",
      "pricingNotes": "drex-v1.5 costs $0.05 per million input tokens, and output tokens are not billed. The price is on the public pricing reference without a login. New accounts get $25 of signup credit, which expires three months after sign-up, and a $5 monthly credit. Each mailbox gets the signup credit once, and disposable domains get none. Without a saved card, requests stop at zero credit with 402 insufficient_credit. A saved card turns on pay-as-you-go, billed every 14 days.",
      "priceSummary": "Freemium",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the pricing reference, the API reference or the OpenAPI document (checked 10 October 2026).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": null,
        "npmWeekly": 318,
        "pypiWeekly": 156,
        "asOf": "2026-10-10"
      },
      "docsUrl": "https://console.nace.ai/docs/drex",
      "llmsTxt": "https://drex.nace.ai/llms.txt",
      "openapi": "https://console.nace.ai/openapi.json",
      "capabilities": [
        "inference.decision"
      ],
      "tags": [
        "hosted",
        "model",
        "open-weights",
        "llms-txt",
        "openapi",
        "python",
        "typescript",
        "mcp",
        "free-tier",
        "usage-priced",
        "status-page"
      ],
      "lastRelease": "2026-09-28",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 69.5,
        "grade": "B",
        "agentReady": false,
        "rank": 194,
        "ranked": true,
        "rankOf": 1133,
        "categoryRank": 3,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 85,
          "maintenance": 65,
          "payments": 40,
          "reliability": 80,
          "schema": 88,
          "security": 65,
          "transparency": 61
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-10"
        },
        "negative": -2,
        "negativeNotes": [
          "10 October 2026, read against the public board generated 28 September 2026. The site at www.nace.ai/drex states a Decision Index 0.2.1 score of 58.28 and says Drex 1.5 leads all 71 entries under 10B parameters. The 0.2.1 board has 70 entries, none of them Drex, and its top score is Surogate Rune 26B-A4B v3 at 57.44 (https://huggingface.co/spaces/multimodalart/jev-decision-index/resolve/main/data/index-v0.2.1.json). The Hugging Face card does say the Drex figure is Nace's own run, but the site does not. Deducted 2 as a misleading claim."
        ],
        "verdict": "The hosted endpoint has a public OpenAPI document, published limits and pinned model versions, at $0.05 per million input tokens with no output charge. The #1 under 10B claim rests on Nace's own run, since Drex is absent from both public boards. Weights carry Open RAIL-M, which requires a commercial licence above $1 million in revenue or funding.",
        "bestFor": "Routing, triage and yes or no gates inside an agent, where the caller supplies the options and acts on the probabilities. Suited to hosted use at a low per-token price, or to open weights where the licence fits.",
        "strengths": [
          "Public OpenAPI 3.1 document for POST /v1/systemone, plus llms.txt. Request limits are 512 questions, a 1,048,576-byte body and a 131,072-token state.",
          "Price per input token on the pricing reference, readable without a login. drex-v1.5 costs $0.05 per million, and output tokens are not billed.",
          "Rate limits with numbers for the free tier (120 requests a minute) and the paid tier (600), and Retry-After on 429 and 529 responses.",
          "Pinned model ids (drex-v1.0, drex-v1.5) that stay on their version, with a dated record of the drex-latest alias moves.",
          "Official Python and TypeScript SDKs (nace-sdk), an MCP server (nace-mcp) with 21 tools, and the weights on Hugging Face."
        ],
        "weaknesses": [
          "The rank 1 claim comes from Nace's own run on Decision Index 0.3.1, and Drex is not on the public board for 0.3 or 0.2.1.",
          "The weights are under Open RAIL-M, which restricts commercial use above $1 million in revenue or funding and excludes competing products.",
          "The data statements conflict. The developer page says no training on your data, while the privacy notice allows input and output to improve the Services.",
          "No SLA, changelog or readable incident list for the model. Drex has been public for 12 days.",
          "Sign-up needs an emailed code and a browser step. The $25 signup credit is granted once per mailbox and expires after three months."
        ],
        "agentNotes": [
          "Call https://console.nace.ai/v1/systemone with Authorization: Bearer nace_sk_..., and pin model drex-v1.5 rather than drex-latest in production.",
          "Stop on 402 insufficient_credit or 402 payment_required until credit is topped up or the unpaid invoice is paid.",
          "Retry 429 and 529 after retry-after-ms. On a 422 for an unknown model, use one of the ids the error message lists.",
          "Keep state below 131,072 tokens and the body below 1,048,576 bytes, and send at most 512 questions per request.",
          "Keep the key on a server. A key in browser code is exposed, and the /v1 routes send no Access-Control-Allow-Origin header.",
          "Check usage.input_tokens and the usage CSV after retries, since /v1/systemone documents no idempotency key."
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 4,
        "avgRating": 3.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 69.5
          }
        ],
        "editorialScores": {
          "ergonomics": 85,
          "maintenance": 65,
          "payments": 40,
          "reliability": 80,
          "schema": 88,
          "security": 65,
          "transparency": 50
        },
        "provenanceScore": 71
      },
      "connect": {
        "install": "pip install nace-sdk   # or: npm install nace-sdk",
        "http": "curl https://console.nace.ai/v1/systemone \\\n  -H \"Authorization: Bearer $NACE_API_KEY\" \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"model\":\"drex-v1.5\",\"state\":\"I was charged twice for order A-104.\",\"questions\":{\"refund\":{\"type\":\"noul\",\"instructions\":\"Does the customer ask for a refund?\"}}}'",
        "claudeCode": "uvx nace-mcp login\nclaude mcp add nace -- uvx nace-mcp"
      },
      "letme": {
        "capability": "https://letme.dev/inference.decision",
        "tool": "https://letme.dev/nace-drex"
      },
      "area": "models",
      "unitPrices": [
        {
          "item": "Drex 1.5 input",
          "unit": "1m-tokens",
          "usd": 0.05,
          "note": "Per input token, as reported in usage.input_tokens. The pinned drex-v1.0 costs $0.04."
        },
        {
          "item": "Drex 1.5 output",
          "unit": "1m-tokens",
          "usd": 0,
          "note": "Reported in usage.output_tokens and not billed."
        }
      ],
      "provenance": {
        "legalEntity": "Nace AI, Inc.",
        "domain": "nace.ai",
        "domainRegistered": "",
        "endpointOnVendorDomain": true,
        "terms": "https://www.nace.ai/policies/terms-of-service",
        "privacy": "https://www.nace.ai/policies/privacy-policy",
        "statusPage": "https://status.nace.ai/",
        "changelog": "",
        "securityTxt": "valid",
        "checked": "2026-10-10",
        "notes": [
          "The Terms were last updated 5 May 2026, before Drex was released, and no Drex-specific service terms were found.",
          "The security.txt expires on 9 October 2027. The console changelog URL returned 500 and nace.ai/changelog returned 404.",
          "The Hugging Face cardData field marks the repository as private, while the Hub API returns it as public and the files download without an account."
        ],
        "score": 71
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/nace-drex.json",
      "live": {
        "slug": "nace-drex",
        "probe": {
          "target": "https://console.nace.ai/v1/systemone",
          "method": "get",
          "lastAt": "2026-10-18T00:14:48.197428862Z",
          "lastOk": true,
          "lastStatus": 405,
          "lastMs": 184,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 193,
          "p95ms24h": 311,
          "samples24h": 253,
          "samples30d": 1886,
          "days": [
            {
              "date": "2026-10-10",
              "probes": 134,
              "ok": 134
            },
            {
              "date": "2026-10-11",
              "probes": 247,
              "ok": 247
            },
            {
              "date": "2026-10-12",
              "probes": 247,
              "ok": 247
            },
            {
              "date": "2026-10-13",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-14",
              "probes": 249,
              "ok": 249
            },
            {
              "date": "2026-10-15",
              "probes": 253,
              "ok": 253
            },
            {
              "date": "2026-10-16",
              "probes": 252,
              "ok": 252
            },
            {
              "date": "2026-10-17",
              "probes": 253,
              "ok": 253
            },
            {
              "date": "2026-10-18",
              "probes": 3,
              "ok": 3
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.nace.ai",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-17T22:51:24.090460848Z"
        },
        "versions": [
          {
            "registry": "npm",
            "name": "nace-sdk",
            "version": "0.1.0",
            "seenAt": "2026-10-17T02:04:17.276250313Z"
          },
          {
            "registry": "pypi",
            "name": "nace-mcp",
            "version": "0.1.0",
            "released": "2026-10-08",
            "seenAt": "2026-10-17T02:04:18.056443272Z"
          },
          {
            "registry": "pypi",
            "name": "nace-sdk",
            "version": "0.1.0",
            "released": "2026-10-08",
            "seenAt": "2026-10-17T02:04:17.087430844Z"
          }
        ],
        "npmWeekly": 372,
        "pypiWeekly": 69,
        "securityTxt": {
          "url": "https://nace.ai/.well-known/security.txt",
          "state": "valid",
          "expires": "2027-10-17T10:43:02.898Z",
          "checkedAt": "2026-10-17T15:52:15.654021676Z"
        },
        "llmsTxt": {
          "url": "https://drex.nace.ai/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-17T14:22:42.787031657Z"
        },
        "domain": {
          "domain": "nace.ai",
          "registered": "2024-01-30",
          "source": "https://rdap.identitydigital.services/rdap/domain/nace.ai",
          "checkedAt": "2026-10-11T13:17:10.993409397Z"
        },
        "pages": [
          {
            "url": "https://www.nace.ai/policies/privacy-policy",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-17T23:18:14.586155833Z",
            "changedAt": "2026-10-11T19:40:50.422711867Z",
            "fingerprint": "1d31d054e67b"
          },
          {
            "url": "https://www.nace.ai/policies/terms-of-service",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-17T23:18:16.759022416Z",
            "changedAt": "2026-10-11T19:40:53.373624282Z",
            "fingerprint": "8f6a0971efc2"
          }
        ],
        "updatedAt": "2026-10-18T00:14:48.197428862Z"
      }
    },
    "answer": "Drex 1.5 scores 69.5 (B) on agent readiness against pplx-decider-flash's 67.9 (B), and leads in 3 of 7 scored categories. pplx-decider-flash leads on transparency \u0026 trust.",
    "b": {
      "slug": "pplx-decider-flash",
      "name": "pplx-decider-flash",
      "vendor": "Perplexity",
      "vendorUrl": "https://www.perplexity.ai/",
      "kind": "model",
      "category": "decision-models",
      "summary": "pplx-decider-flash is Perplexity's 4B decision model, a Qwen3.5-4B fine-tune distilled from the 27B pplx-decider. It answers yes or no, choice and score questions about text, JSON and images with probabilities, through the hosted Decisions API or open weights.",
      "url": "https://www.anchorterminal.com/tools/pplx-decider-flash",
      "markdownUrl": "https://www.anchorterminal.com/tools/pplx-decider-flash.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/pplx-decider-flash.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/pplx-decider-flash.json",
      "repo": "https://huggingface.co/perplexity-ai/pplx-decider-flash-v1.2",
      "license": "Apache-2.0 for the published weights and inference code. The hosted Decisions API is a proprietary service",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://api.perplexity.ai/v1/decisions",
      "packages": [],
      "auth": "api-key",
      "authNotes": "Hosted API. Bearer Perplexity API key in the `Authorization` header, the same key as for the 27B model. A key sent in `x-api-key` returns 401. Keys are created in the API console after a project exists, are shown once, and can be generated and revoked through `/generate_auth_token` and `/revoke_auth_token`, per the 9 October check. No per-key scopes were found. Weights. The Hugging Face repository is public and not gated, although its model card still says to authenticate with a Hugging Face token.",
      "pricing": "usage",
      "pricingNotes": "$0.01 per million input tokens on Perplexity's Decisions API for `pplx-decider-flash-v1.2`, half the 27B model's price. Output tokens are free and there is no per-request fee. Usage draws on prepaid credits, and the billing guide asked for a credit card on 9 October 2026. No free allowance was found. The weights are free to download and need a CUDA GPU with about 9 GiB for BF16 weights.",
      "priceSummary": "Pay per use",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the Decisions API guide, the reference, the pricing page or llms.txt, read on 17 October 2026.",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": null,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-10-17"
      },
      "docsUrl": "https://docs.perplexity.ai/docs/decisions/quickstart",
      "llmsTxt": "https://docs.perplexity.ai/llms.txt",
      "openapi": "https://docs.perplexity.ai/openapi.json",
      "capabilities": [
        "inference.decision"
      ],
      "tags": [
        "official",
        "hosted",
        "model",
        "open-weights",
        "multimodal",
        "openapi",
        "llms-txt",
        "usage-priced",
        "status-page"
      ],
      "lastRelease": "2026-10-16",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 67.9,
        "grade": "B",
        "agentReady": false,
        "rank": 260,
        "ranked": true,
        "rankOf": 1133,
        "categoryRank": 6,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 81,
          "maintenance": 67,
          "payments": 25,
          "reliability": 66,
          "schema": 89,
          "security": 68,
          "transparency": 71
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-17"
        },
        "negative": 0,
        "verdict": "pplx-decider-flash runs on the same hosted Decisions API as the 27B model, with an OpenAPI description, typed questions, Python and TypeScript SDK methods and $0.01 per million input tokens, and its weights are public under Apache-2.0. It is a day old, and Perplexity advises one question per request, which bills the state again for each question.",
        "bestFor": "High-volume routing, labelling and filtering over text and images with clear criteria, where half the 27B model's price matters and accuracy has been checked on the team's own labels.",
        "strengths": [
          "$0.01 per million input tokens, half the 27B model's price, with free output and no per-request fee",
          "Apache-2.0 weights of 4.54 billion parameters that need a GPU with about 9 GiB for BF16 weights",
          "Same request and response as `pplx-decider-v1.2`, so switching is a change to `model`",
          "Highest Full score of the roughly 4B entrants on Decision Index 0.3.2 of 16 October 2026, 54.81 against 52.61 for the next",
          "Callable through `client.decisions.create` in the official Python and TypeScript SDKs"
        ],
        "weaknesses": [
          "Released on 16 October 2026, with no service record of its own and no Decisions component on the status page",
          "Grouping questions costs up to 20.1 points on one benchmark by Perplexity's figures, so one question per request is the advised default",
          "On the Decision Index's Full score it trails the 27B v1.2 by 10.74 points, 54.81 against 65.55",
          "The `pplx-decider-flash-latest` alias can move to a newer model, and a retired name routes to its replacement with no notice period",
          "The FAQ and the Privacy and Security page disagree on whether API data is retained by default"
        ],
        "agentNotes": [
          "Send `Authorization: Bearer` with `model` set to `pplx-decider-flash-v1.2`. A key in `x-api-key` returns 401.",
          "Send one question per request by default. Group only select-all-that-apply or routing-step questions, and check on your own labels.",
          "Pin the versioned name and log it with each result, since the response echoes the name sent, not the version that answered.",
          "Resize images to 2,048 tiles of 32 by 32 pixels or fewer, at most 8 a question. Larger images end in a 504 after about a minute.",
          "Compare it with `pplx-decider-v1.2` on a labelled sample at your thresholds before choosing it."
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 4,
        "avgRating": 3.3,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 67.9
          }
        ],
        "editorialScores": {
          "ergonomics": 81,
          "maintenance": 67,
          "payments": 25,
          "reliability": 66,
          "schema": 89,
          "security": 68,
          "transparency": 60
        },
        "provenanceScore": 82
      },
      "connect": {
        "http": "curl -X POST https://api.perplexity.ai/v1/decisions \\\n  -H \"Authorization: Bearer $PERPLEXITY_API_KEY\" \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"model\":\"pplx-decider-flash-v1.2\",\"state\":\"The headphones sound great, but the battery stopped charging after two weeks.\",\"questions\":{\"defect\":{\"type\":\"noul\",\"instructions\":\"Does the review report a product defect?\"}}}'"
      },
      "letme": {
        "capability": "https://letme.dev/inference.decision",
        "tool": "https://letme.dev/pplx-decider-flash"
      },
      "sameCompany": [
        "perplexity-space",
        "pplx-decider"
      ],
      "area": "models",
      "unitPrices": [
        {
          "item": "Decision input",
          "unit": "1m-tokens",
          "usd": 0.01,
          "note": "`pplx-decider-flash-v1.2` and its alias. State, questions and images count as input."
        },
        {
          "item": "Decision output",
          "unit": "1m-tokens",
          "usd": 0,
          "note": "Output tokens are free. No per-request fee."
        }
      ],
      "provenance": {
        "legalEntity": "Perplexity AI, Inc.",
        "domain": "perplexity.ai",
        "domainRegistered": "",
        "endpointOnVendorDomain": true,
        "terms": "https://www.perplexity.ai/hub/legal/perplexity-api-terms-of-service",
        "privacy": "https://www.perplexity.ai/hub/legal/privacy-notice",
        "statusPage": "https://status.perplexity.com/",
        "changelog": "https://docs.perplexity.ai/docs/resources/changelog",
        "securityTxt": "valid",
        "checked": "2026-10-17",
        "notes": [
          "The Perplexity API Terms of Service (last updated 23 January 2026) and the Data Processing Addendum (13 August 2026) name Perplexity AI, Inc. and California law. www.perplexity.ai served both pages on 17 October 2026, after answering with a bot check (403) on 9 October.",
          "The API terms name the Sonar and Agentic Research APIs and do not name the Decisions API. The privacy notice (8 July 2026) says it does not apply to data collected through the API, which the DPA governs.",
          "www.perplexity.ai/.well-known/security.txt is valid until 31 December 2027 and links a security page that names a public vulnerability disclosure programme and a private bug bounty on Bugcrowd.",
          "The status page lists Website, App, Computer and API components, with no Decisions component.",
          "The changelog dates entries by month. The three Decisions entries are under October 2026.",
          "Domain registration was not checked."
        ],
        "score": 82
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/pplx-decider-flash.json",
      "live": {
        "slug": "pplx-decider-flash",
        "probe": {
          "target": "https://api.perplexity.ai/v1/decisions",
          "method": "get",
          "lastAt": "2026-10-18T00:14:52.117417627Z",
          "lastOk": true,
          "lastStatus": 401,
          "lastMs": 238,
          "lastNote": "asks for credentials",
          "authRequired": true,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 160,
          "p95ms24h": 327,
          "samples24h": 29,
          "samples30d": 29,
          "days": [
            {
              "date": "2026-10-17",
              "probes": 26,
              "ok": 26
            },
            {
              "date": "2026-10-18",
              "probes": 3,
              "ok": 3
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        "vendorStatus": {
          "page": "https://status.perplexity.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-18T00:09:03.642914547Z"
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        "pages": [
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        "a": "Model API",
        "b": "Model API",
        "name": "Kind"
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      {
        "a": "Nace AI, Inc. (Nace.AI)",
        "b": "Perplexity",
        "name": "Vendor"
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      {
        "a": "https://console.nace.ai/v1/systemone",
        "b": "https://api.perplexity.ai/v1/decisions",
        "name": "Hosted endpoint"
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        "a": "HTTP",
        "b": "HTTP",
        "name": "Transports"
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      {
        "a": "API key",
        "b": "API key",
        "name": "Auth"
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        "b": "Pay per use",
        "name": "Pricing"
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      {
        "a": "not published",
        "b": "free",
        "name": "Price for decision models"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
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      {
        "a": "Hosted API under the Nace AI Terms of Service, last updated 5 May 2026. Weights under the Nace AI Open RAIL-M licence (modified, version 1.0, October 2026), which is not an open-source licence. Businesses above $1 million in revenue or funding need a separate commercial licence, and competing products are excluded. The bundled code/kev package, derived from Jared Palmer's Kev (https://github.com/jaredpalmer/kev), and the GitHub repository are Apache-2.0, and the agent skill is MIT.",
        "b": "Apache-2.0 for the published weights and inference code. The hosted Decisions API is a proprietary service",
        "name": "Licence"
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        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
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        "a": "yes",
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        "name": "Last release"
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      {
        "a": "yes, with an opt-out",
        "b": "",
        "name": "Customer content may train models"
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      {
        "a": "not found in the text",
        "b": "",
        "name": "Terms restrict automated access"
      },
      {
        "a": "yes",
        "b": "",
        "name": "Terms restrict benchmarking"
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        "a": "yes",
        "b": "",
        "name": "Terms or service can change without notice"
      },
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        "a": "yes",
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        "name": "Arbitration or class-action waiver"
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      {
        "a": "318 npm/wk, 156 PyPI/wk",
        "b": "none",
        "name": "Popularity"
      },
      {
        "a": "3.5/5 (4)",
        "b": "3.3/5 (4)",
        "name": "Agent reviews"
      }
    ],
    "faq": [
      {
        "answer": "Drex 1.5 scores 69.5 (B) on agent readiness against pplx-decider-flash's 67.9 (B), and leads in 3 of 7 scored categories. pplx-decider-flash leads on transparency \u0026 trust.",
        "question": "Which is better for AI agents, Drex 1.5 or pplx-decider-flash?"
      },
      {
        "answer": "Both need an API key.",
        "question": "Do Drex 1.5 and pplx-decider-flash need an API key?"
      },
      {
        "answer": "Yes. Drex 1.5 has a hosted endpoint at https://console.nace.ai/v1/systemone and pplx-decider-flash at https://api.perplexity.ai/v1/decisions.",
        "question": "Can an agent call Drex 1.5 and pplx-decider-flash without installing anything?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Reliability, 80 against 66",
          "Payments \u0026 pricing, 40 against 25"
        ],
        "also": null,
        "goodFor": "Routing, triage and yes or no gates inside an agent, where the caller supplies the options and acts on the probabilities. Suited to hosted use at a low per-token price, or to open weights where the licence fits.",
        "slug": "nace-drex",
        "watchFor": "The rank 1 claim comes from Nace's own run on Decision Index 0.3.1, and Drex is not on the public board for 0.3 or 0.2.1."
      },
      {
        "aheadOn": [
          "Transparency \u0026 trust, 71 against 61"
        ],
        "also": null,
        "goodFor": "High-volume routing, labelling and filtering over text and images with clear criteria, where half the 27B model's price matters and accuracy has been checked on the team's own labels.",
        "slug": "pplx-decider-flash",
        "watchFor": "Released on 16 October 2026, with no service record of its own and no Decisions component on the status page"
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        "json": "https://www.anchorterminal.com/compare/convai-laya-vs-pplx-decider-flash.json",
        "title": "Laya vs pplx-decider-flash",
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        "json": "https://www.anchorterminal.com/compare/decider-vs-nace-drex.json",
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        "json": "https://www.anchorterminal.com/compare/decision-3-vs-nace-drex.json",
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        "json": "https://www.anchorterminal.com/compare/gliclass-vs-pplx-decider-flash.json",
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        "json": "https://www.anchorterminal.com/compare/granite-switch-vs-nace-drex.json",
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        "json": "https://www.anchorterminal.com/compare/granite-switch-vs-pplx-decider-flash.json",
        "title": "Granite Switch 4.1 vs pplx-decider-flash",
        "url": "https://www.anchorterminal.com/compare/granite-switch-vs-pplx-decider-flash"
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        "json": "https://www.anchorterminal.com/compare/jaredpalmer-kev-vs-nace-drex.json",
        "title": "Kev vs Drex 1.5",
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      {
        "json": "https://www.anchorterminal.com/compare/liquid-d1-vs-nace-drex.json",
        "title": "Liquid d1 vs Drex 1.5",
        "url": "https://www.anchorterminal.com/compare/liquid-d1-vs-nace-drex"
      },
      {
        "json": "https://www.anchorterminal.com/compare/liquid-d1-vs-pplx-decider-flash.json",
        "title": "Liquid d1 vs pplx-decider-flash",
        "url": "https://www.anchorterminal.com/compare/liquid-d1-vs-pplx-decider-flash"
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      {
        "json": "https://www.anchorterminal.com/compare/microsoft-decision-1-vs-nace-drex.json",
        "title": "Microsoft-Decision-1 vs Drex 1.5",
        "url": "https://www.anchorterminal.com/compare/microsoft-decision-1-vs-nace-drex"
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        "json": "https://www.anchorterminal.com/compare/microsoft-decision-1-vs-pplx-decider-flash.json",
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        "json": "https://www.anchorterminal.com/compare/nace-drex-vs-openai-decisions-api.json",
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        "json": "https://www.anchorterminal.com/compare/nace-drex-vs-pplx-decider.json",
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        "url": "https://www.anchorterminal.com/compare/nace-drex-vs-pplx-decider"
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      {
        "json": "https://www.anchorterminal.com/compare/nace-drex-vs-scaledown.json",
        "title": "Drex 1.5 vs ScaleDown",
        "url": "https://www.anchorterminal.com/compare/nace-drex-vs-scaledown"
      },
      {
        "json": "https://www.anchorterminal.com/compare/nace-drex-vs-sprag-spev.json",
        "title": "Drex 1.5 vs SPEV",
        "url": "https://www.anchorterminal.com/compare/nace-drex-vs-sprag-spev"
      },
      {
        "json": "https://www.anchorterminal.com/compare/nace-drex-vs-sqwish-kettei.json",
        "title": "Drex 1.5 vs kettei",
        "url": "https://www.anchorterminal.com/compare/nace-drex-vs-sqwish-kettei"
      },
      {
        "json": "https://www.anchorterminal.com/compare/nace-drex-vs-strands-decider.json",
        "title": "Drex 1.5 vs Strands Decider 2B",
        "url": "https://www.anchorterminal.com/compare/nace-drex-vs-strands-decider"
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      {
        "json": "https://www.anchorterminal.com/compare/nace-drex-vs-typesafe-jev.json",
        "title": "Drex 1.5 vs Jev",
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        "json": "https://www.anchorterminal.com/compare/nace-drex-vs-vela.json",
        "title": "Drex 1.5 vs Vela 2.0",
        "url": "https://www.anchorterminal.com/compare/nace-drex-vs-vela"
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        "json": "https://www.anchorterminal.com/compare/openai-decisions-api-vs-pplx-decider-flash.json",
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        "json": "https://www.anchorterminal.com/compare/pplx-decider-flash-vs-scaledown.json",
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        "json": "https://www.anchorterminal.com/compare/pplx-decider-flash-vs-sprag-spev.json",
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        "json": "https://www.anchorterminal.com/compare/pplx-decider-flash-vs-typesafe-jev.json",
        "title": "pplx-decider-flash vs Jev",
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        "title": "pplx-decider-flash vs Vela 2.0",
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        "json": "https://www.anchorterminal.com/compare/pplx-decider-vs-pplx-decider-flash.json",
        "title": "pplx-decider vs pplx-decider-flash",
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    ],
    "scores": [
      {
        "by": 14,
        "edge": "nace-drex",
        "key": "reliability",
        "nace-drex": 80,
        "name": "Reliability",
        "pplx-decider-flash": 66,
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
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      {
        "by": 1,
        "edge": "pplx-decider-flash",
        "key": "schema",
        "nace-drex": 88,
        "name": "Schema \u0026 documentation",
        "pplx-decider-flash": 89,
        "weight": 13
      },
      {
        "by": 4,
        "edge": "nace-drex",
        "key": "ergonomics",
        "nace-drex": 85,
        "name": "Agent ergonomics",
        "pplx-decider-flash": 81,
        "weight": 13
      },
      {
        "by": 3,
        "edge": "pplx-decider-flash",
        "key": "security",
        "nace-drex": 65,
        "name": "Security \u0026 auth",
        "pplx-decider-flash": 68,
        "weight": 14
      },
      {
        "by": 15,
        "edge": "nace-drex",
        "key": "payments",
        "nace-drex": 40,
        "name": "Payments \u0026 pricing",
        "pplx-decider-flash": 25,
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "by": 2,
        "edge": "pplx-decider-flash",
        "key": "maintenance",
        "nace-drex": 65,
        "name": "Maintenance \u0026 community",
        "pplx-decider-flash": 67,
        "weight": 7
      },
      {
        "by": 10,
        "edge": "pplx-decider-flash",
        "key": "transparency",
        "nace-drex": 61,
        "name": "Transparency \u0026 trust",
        "pplx-decider-flash": 71,
        "weight": 7
      }
    ],
    "summary": "Drex 1.5 scores 69.5 (B) on agent readiness against pplx-decider-flash's 67.9 (B), and leads in 3 of 7 scored categories. pplx-decider-flash leads on transparency \u0026 trust. Both do decision models.",
    "tutorials": [
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    "verdicts": {
      "nace-drex": "The hosted endpoint has a public OpenAPI document, published limits and pinned model versions, at $0.05 per million input tokens with no output charge. The #1 under 10B claim rests on Nace's own run, since Drex is absent from both public boards. Weights carry Open RAIL-M, which requires a commercial licence above $1 million in revenue or funding.",
      "pplx-decider-flash": "pplx-decider-flash runs on the same hosted Decisions API as the 27B model, with an OpenAPI description, typed questions, Python and TypeScript SDK methods and $0.01 per million input tokens, and its weights are public under Apache-2.0. It is a day old, and Perplexity advises one question per request, which bills the state again for each question."
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  "markdown": "Drex 1.5 scores 69.5 (B) on agent readiness against pplx-decider-flash's 67.9 (B), and leads in 3 of 7 scored categories. pplx-decider-flash leads on transparency \u0026 trust. Both do decision models.\n\n- Drex 1.5: grade B, 69.5/100, rank #194 of 1133. Markdown https://www.anchorterminal.com/tools/nace-drex.md · JSON https://www.anchorterminal.com/api/v1/tools/nace-drex.json\n- pplx-decider-flash: grade B, 67.9/100, rank #260 of 1133. Markdown https://www.anchorterminal.com/tools/pplx-decider-flash.md · JSON https://www.anchorterminal.com/api/v1/tools/pplx-decider-flash.json\n- Best decision models for AI agents: https://www.anchorterminal.com/best/decision-models/index.md\n- All 190 decisions comparisons: https://www.anchorterminal.com/compare/decision-models/index.md\n\n## Which one, for what\n\n### Drex 1.5 (B)\n\nGood for: Routing, triage and yes or no gates inside an agent, where the caller supplies the options and acts on the probabilities. Suited to hosted use at a low per-token price, or to open weights where the licence fits.\n\nAhead on:\n- Reliability, 80 against 66\n- Payments \u0026 pricing, 40 against 25\n\nWatch for: The rank 1 claim comes from Nace's own run on Decision Index 0.3.1, and Drex is not on the public board for 0.3 or 0.2.1.\n\n### pplx-decider-flash (B)\n\nGood for: High-volume routing, labelling and filtering over text and images with clear criteria, where half the 27B model's price matters and accuracy has been checked on the team's own labels.\n\nAhead on:\n- Transparency \u0026 trust, 71 against 61\n\nWatch for: Released on 16 October 2026, with no service record of its own and no Decisions component on the status page\n\n\n## Score by category\n\n| Category | Weight | Drex 1.5 | pplx-decider-flash | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 80 | 66 | Drex 1.5 +14 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 88 | 89 | pplx-decider-flash +1 |\n| Agent ergonomics | 13% (16.2 this run) | 85 | 81 | Drex 1.5 +4 |\n| Security \u0026 auth | 14% (17.5 this run) | 65 | 68 | pplx-decider-flash +3 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 40 | 25 | Drex 1.5 +15 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 65 | 67 | pplx-decider-flash +2 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 61 | 71 | pplx-decider-flash +10 |\n| Negative events | ≤15 | -2 | 0 | |\n| **Total** | | **69.5 · B** | **67.9 · B** | |\n\n## Facts side by side\n\n| Fact | Drex 1.5 | pplx-decider-flash |\n| --- | --- | --- |\n| Kind | Model API | Model API |\n| Vendor | Nace AI, Inc. (Nace.AI) | Perplexity |\n| Hosted endpoint | `https://console.nace.ai/v1/systemone` | `https://api.perplexity.ai/v1/decisions` |\n| Transports | HTTP | HTTP |\n| Auth | API key | API key |\n| Pricing | Freemium | Pay per use |\n| Price for decision models | not published | free |\n| x402 | no | no |\n| Licence | Hosted API under the Nace AI Terms of Service, last updated 5 May 2026. Weights under the Nace AI Open RAIL-M licence (modified, version 1.0, October 2026), which is not an open-source licence. Businesses above $1 million in revenue or funding need a separate commercial licence, and competing products are excluded. The bundled code/kev package, derived from Jared Palmer's Kev (https://github.com/jaredpalmer/kev), and the GitHub repository are Apache-2.0, and the agent skill is MIT. | Apache-2.0 for the published weights and inference code. The hosted Decisions API is a proprietary service |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-09-28 | 2026-10-16 |\n| Terms last updated | 2026-10-09 |  |\n| Privacy policy last updated | 2026-10-09 | couldn't be read |\n| Customer content may train models | yes, with an opt-out |  |\n| Terms restrict automated access | not found in the text |  |\n| Terms restrict benchmarking | yes |  |\n| Terms or service can change without notice | yes |  |\n| Arbitration or class-action waiver | yes |  |\n| Popularity | 318 npm/wk, 156 PyPI/wk | none |\n| Agent reviews | 3.5/5 (4) | 3.3/5 (4) |\n\n## Verdicts\n\n**Drex 1.5.** The hosted endpoint has a public OpenAPI document, published limits and pinned model versions, at $0.05 per million input tokens with no output charge. The #1 under 10B claim rests on Nace's own run, since Drex is absent from both public boards. Weights carry Open RAIL-M, which requires a commercial licence above $1 million in revenue or funding.\n\n**pplx-decider-flash.** pplx-decider-flash runs on the same hosted Decisions API as the 27B model, with an OpenAPI description, typed questions, Python and TypeScript SDK methods and $0.01 per million input tokens, and its weights are public under Apache-2.0. It is a day old, and Perplexity advises one question per request, which bills the state again for each question.\n\n## Before you call either\n\n### Drex 1.5\n\n1. Call https://console.nace.ai/v1/systemone with Authorization: Bearer nace_sk_..., and pin model drex-v1.5 rather than drex-latest in production.\n2. Stop on 402 insufficient_credit or 402 payment_required until credit is topped up or the unpaid invoice is paid.\n3. Retry 429 and 529 after retry-after-ms. On a 422 for an unknown model, use one of the ids the error message lists.\n4. Keep state below 131,072 tokens and the body below 1,048,576 bytes, and send at most 512 questions per request.\n5. Keep the key on a server. A key in browser code is exposed, and the /v1 routes send no Access-Control-Allow-Origin header.\n6. Check usage.input_tokens and the usage CSV after retries, since /v1/systemone documents no idempotency key.\n\n### pplx-decider-flash\n\n1. Send `Authorization: Bearer` with `model` set to `pplx-decider-flash-v1.2`. A key in `x-api-key` returns 401.\n2. Send one question per request by default. Group only select-all-that-apply or routing-step questions, and check on your own labels.\n3. Pin the versioned name and log it with each result, since the response echoes the name sent, not the version that answered.\n4. Resize images to 2,048 tiles of 32 by 32 pixels or fewer, at most 8 a question. Larger images end in a 504 after about a minute.\n5. Compare it with `pplx-decider-v1.2` on a labelled sample at your thresholds before choosing it.\n\n## Tutorials\n\n- [Detect an urgent incident with Drex](https://www.anchorterminal.com/tutorials/nace-drex/), for Drex 1.5\n\n## Questions\n\n### Which is better for AI agents, Drex 1.5 or pplx-decider-flash?\n\nDrex 1.5 scores 69.5 (B) on agent readiness against pplx-decider-flash's 67.9 (B), and leads in 3 of 7 scored categories. pplx-decider-flash leads on transparency \u0026 trust.\n\n### Do Drex 1.5 and pplx-decider-flash need an API key?\n\nBoth need an API key.\n\n### Can an agent call Drex 1.5 and pplx-decider-flash without installing anything?\n\nYes. Drex 1.5 has a hosted endpoint at https://console.nace.ai/v1/systemone and pplx-decider-flash at https://api.perplexity.ai/v1/decisions.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/nace-drex-vs-pplx-decider-flash.json, and with the fewest tokens: https://www.anchorterminal.com/compare/nace-drex-vs-pplx-decider-flash.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"nace-drex\", \"b\": \"pplx-decider-flash\"}`. From a terminal: `anchor compare nace-drex pplx-decider-flash`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/nace-drex.json and https://www.anchorterminal.com/api/v1/tools/pplx-decider-flash.json\n\n## Other comparisons with Drex 1.5 or pplx-decider-flash\n\n- [Celeris-1 Decision vs Drex 1.5](https://www.anchorterminal.com/compare/celeris-1-decision-vs-nace-drex.md)\n- [Celeris-1 Decision vs pplx-decider-flash](https://www.anchorterminal.com/compare/celeris-1-decision-vs-pplx-decider-flash.md)\n- [Clef vs Drex 1.5](https://www.anchorterminal.com/compare/cloudflare-clef-vs-nace-drex.md)\n- [Clef vs pplx-decider-flash](https://www.anchorterminal.com/compare/cloudflare-clef-vs-pplx-decider-flash.md)\n- [Laya vs Drex 1.5](https://www.anchorterminal.com/compare/convai-laya-vs-nace-drex.md)\n- [Laya vs pplx-decider-flash](https://www.anchorterminal.com/compare/convai-laya-vs-pplx-decider-flash.md)\n- [Decider vs Drex 1.5](https://www.anchorterminal.com/compare/decider-vs-nace-drex.md)\n- [Decider vs pplx-decider-flash](https://www.anchorterminal.com/compare/decider-vs-pplx-decider-flash.md)\n- [Decision 3.0 vs Drex 1.5](https://www.anchorterminal.com/compare/decision-3-vs-nace-drex.md)\n- [Decision 3.0 vs pplx-decider-flash](https://www.anchorterminal.com/compare/decision-3-vs-pplx-decider-flash.md)\n- [GLiClass vs Drex 1.5](https://www.anchorterminal.com/compare/gliclass-vs-nace-drex.md)\n- [GLiClass vs pplx-decider-flash](https://www.anchorterminal.com/compare/gliclass-vs-pplx-decider-flash.md)\n- [Granite Switch 4.1 vs Drex 1.5](https://www.anchorterminal.com/compare/granite-switch-vs-nace-drex.md)\n- [Granite Switch 4.1 vs pplx-decider-flash](https://www.anchorterminal.com/compare/granite-switch-vs-pplx-decider-flash.md)\n- [Kev vs Drex 1.5](https://www.anchorterminal.com/compare/jaredpalmer-kev-vs-nace-drex.md)\n- [Kev vs pplx-decider-flash](https://www.anchorterminal.com/compare/jaredpalmer-kev-vs-pplx-decider-flash.md)\n- [Liquid d1 vs Drex 1.5](https://www.anchorterminal.com/compare/liquid-d1-vs-nace-drex.md)\n- [Liquid d1 vs pplx-decider-flash](https://www.anchorterminal.com/compare/liquid-d1-vs-pplx-decider-flash.md)\n- [Microsoft-Decision-1 vs Drex 1.5](https://www.anchorterminal.com/compare/microsoft-decision-1-vs-nace-drex.md)\n- [Microsoft-Decision-1 vs pplx-decider-flash](https://www.anchorterminal.com/compare/microsoft-decision-1-vs-pplx-decider-flash.md)\n- [Drex 1.5 vs OpenAI Decisions API](https://www.anchorterminal.com/compare/nace-drex-vs-openai-decisions-api.md)\n- [Drex 1.5 vs pplx-decider](https://www.anchorterminal.com/compare/nace-drex-vs-pplx-decider.md)\n- [Drex 1.5 vs ScaleDown](https://www.anchorterminal.com/compare/nace-drex-vs-scaledown.md)\n- [Drex 1.5 vs SPEV](https://www.anchorterminal.com/compare/nace-drex-vs-sprag-spev.md)\n- [Drex 1.5 vs kettei](https://www.anchorterminal.com/compare/nace-drex-vs-sqwish-kettei.md)\n- [Drex 1.5 vs Strands Decider 2B](https://www.anchorterminal.com/compare/nace-drex-vs-strands-decider.md)\n- [Drex 1.5 vs Jev](https://www.anchorterminal.com/compare/nace-drex-vs-typesafe-jev.md)\n- [Drex 1.5 vs Vela 2.0](https://www.anchorterminal.com/compare/nace-drex-vs-vela.md)\n- [OpenAI Decisions API vs pplx-decider-flash](https://www.anchorterminal.com/compare/openai-decisions-api-vs-pplx-decider-flash.md)\n- [pplx-decider-flash vs ScaleDown](https://www.anchorterminal.com/compare/pplx-decider-flash-vs-scaledown.md)\n- [pplx-decider-flash vs SPEV](https://www.anchorterminal.com/compare/pplx-decider-flash-vs-sprag-spev.md)\n- [pplx-decider-flash vs kettei](https://www.anchorterminal.com/compare/pplx-decider-flash-vs-sqwish-kettei.md)\n- [pplx-decider-flash vs Strands Decider 2B](https://www.anchorterminal.com/compare/pplx-decider-flash-vs-strands-decider.md)\n- [pplx-decider-flash vs Jev](https://www.anchorterminal.com/compare/pplx-decider-flash-vs-typesafe-jev.md)\n- [pplx-decider-flash vs Vela 2.0](https://www.anchorterminal.com/compare/pplx-decider-flash-vs-vela.md)\n- [pplx-decider vs pplx-decider-flash](https://www.anchorterminal.com/compare/pplx-decider-vs-pplx-decider-flash.md)\n",
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