{
  "data": {
    "a": {
      "slug": "pipecat-phonellm",
      "name": "Pipecat PhoneLLM",
      "vendor": "Daily",
      "vendorUrl": "https://www.daily.co/blog/phonellm-alpha-2/",
      "kind": "model",
      "category": "voice-agents",
      "summary": "Pipecat PhoneLLM is Daily's open-weight text model for the language step of phone voice agents, with tool calling. Alpha 2, released 15 October 2026, comes as Mini (30B, on Workers AI) and Max (120B, weights and dedicated endpoints).",
      "url": "https://www.anchorterminal.com/tools/pipecat-phonellm",
      "markdownUrl": "https://www.anchorterminal.com/tools/pipecat-phonellm.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/pipecat-phonellm.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/pipecat-phonellm.json",
      "repo": "https://huggingface.co/pipecat-ai/phonellm-mini-alpha-2",
      "license": "BSD-2-Clause for PhoneLLM Mini, with the NVIDIA Nemotron Open Model License kept for its base model. OpenMDW-1.1 for PhoneLLM Max, the licence of its base model. Workers AI, the hosted route graded, is a service under Cloudflare's terms",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://api.cloudflare.com/client/v4/accounts/{account_id}/ai/run/@cf/daily-co/phonellm-mini-alpha-2",
      "packages": [],
      "auth": "api-key",
      "authNotes": "On Workers AI, a Cloudflare API token with Workers AI permission on one account, sent as a Bearer header. Inside a Worker the `AI` binding needs no token. The weights of both sizes download from Hugging Face without an account or approval, and a self-hosted vLLM server has whatever authentication the owner adds. Baseten, Modal and AWS SageMaker each need their own account.",
      "pricing": "freemium",
      "pricingNotes": "PhoneLLM Mini costs $0.06 per million input tokens and $0.24 per million output tokens on Workers AI (5,455 and 21,818 neurons), with no cached-input price listed. Workers AI includes 10,000 neurons a day on the Free and Paid Workers plans (https://developers.cloudflare.com/workers-ai/platform/pricing/, read 17 October 2026). Max has no per-token route. It runs on dedicated GPU endpoints at Baseten or Modal, billed for compute, or on the owner's hardware (two B200 or B300 GPUs for BF16, per the card). The weights are free to download.",
      "priceSummary": "Freemium",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "Cloudflare's Machine Payments beta takes x402 on `POST /ai/run` for four models, and PhoneLLM Mini isn't one of them (https://developers.cloudflare.com/ai-gateway/features/machine-payments/, read 17 October 2026). No x402, MPP or L402 on the Daily post or the model cards.",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": null,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-10-17"
      },
      "docsUrl": "https://huggingface.co/pipecat-ai/phonellm-mini-alpha-2",
      "llmsTxt": "https://developers.cloudflare.com/llms.txt",
      "capabilities": [
        "voice.pipeline",
        "voice.tools",
        "inference.llm",
        "inference.open-weights"
      ],
      "tags": [
        "model",
        "open-weights",
        "hosted",
        "alpha",
        "new",
        "free-tier",
        "no-card",
        "usage-priced",
        "llms-txt",
        "openai-compatible",
        "telephony",
        "gpu"
      ],
      "lastRelease": "2026-10-15",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 58.7,
        "grade": "C",
        "agentReady": false,
        "rank": 629,
        "ranked": true,
        "rankOf": 1133,
        "categoryRank": 12,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 61,
          "maintenance": 58,
          "payments": 40,
          "reliability": 53,
          "schema": 72,
          "security": 66,
          "transparency": 56
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-17"
        },
        "negative": 0,
        "verdict": "PhoneLLM Mini is callable per token on Workers AI at $0.06 input and $0.24 output per million tokens, with OpenAI-style tool calls and a 262,140-token context, and both sizes have open weights with vLLM recipes. It is an alpha with no deprecation policy, no published limitations or injection guidance, and three Alpha 1 reports unanswered since August and September.",
        "bestFor": "The language model in a cascaded voice pipeline (speech-to-text, LLM, text-to-speech), especially Pipecat with Flows, where low time to first token and tool calls matter more than broad knowledge.",
        "strengths": [
          "Mini is on Workers AI at $0.06 per million input and $0.24 per million output tokens, inside the 10,000 free neurons a day",
          "Both sizes are trained for multi-turn tool calling and Pipecat Flows, and take OpenAI-style `tools` and `tool_choice`",
          "Ungated weights in BF16, FP8 and NVFP4, with vLLM 0.30 recipes measured on B200 GPUs in each card",
          "Mini is BSD-2-Clause and Max OpenMDW-1.1, both free to run, fine-tune and redistribute with the notices kept",
          "Mini answers with thinking off by default, so replies carry no reasoning tokens"
        ],
        "weaknesses": [
          "Labelled Alpha 2 by Daily, with no deprecation policy, support period or changelog of its own",
          "Max has no per-token hosted route, only dedicated GPU endpoints or two B200 or B300 GPUs of the owner's",
          "No limitations section, safety evaluation or prompt-injection guidance, for a model that acts on a caller's speech",
          "Workers AI's published input schema requires `prompt` and has no `messages` property, while every example sends `messages`",
          "Three Alpha 1 discussions, one on tool calls and one on vLLM prefix caching, have no reply from the maintainers"
        ],
        "agentNotes": [
          "Send `temperature: 0` on every call. The repositories' generation_config.json samples by default, and Max's sets temperature 1.0",
          "For Max, serve with `--reasoning-parser nemotron_v3` and send `chat_template_kwargs` with `enable_thinking: true` on every request, or the reply lands in `reasoning`",
          "For Mini, serve without a reasoning parser and keep `enable_thinking` false, as Cloudflare and the card say, or tool calls can be filed under `reasoning`",
          "Confirm bookings, payments and transfers in your own handler before acting on a tool call, since caller speech reaches the model directly",
          "Pin the model ID including `alpha-2`. Daily states no notice period, and a later alpha may replace it"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 4,
        "avgRating": 2.8,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "C",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 58.7
          }
        ],
        "editorialScores": {
          "ergonomics": 61,
          "maintenance": 58,
          "payments": 40,
          "reliability": 53,
          "schema": 72,
          "security": 66,
          "transparency": 55
        },
        "provenanceScore": 57
      },
      "connect": {
        "install": "vllm serve pipecat-ai/phonellm-mini-alpha-2 \\\n  --served-model-name phonellm-mini-alpha-2 \\\n  --trust-remote-code \\\n  --dtype bfloat16 \\\n  --max-model-len 32768 \\\n  --max-num-seqs 256 \\\n  --enable-prefix-caching \\\n  --async-scheduling \\\n  --mamba-ssm-cache-dtype float32 \\\n  --enable-auto-tool-choice \\\n  --tool-call-parser qwen3_coder",
        "http": "curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/run/@cf/daily-co/phonellm-mini-alpha-2 \\\n  -X POST \\\n  -H \"Authorization: Bearer $CLOUDFLARE_AUTH_TOKEN\" \\\n  -d '{ \"messages\": [{ \"role\": \"system\", \"content\": \"You are a friendly assistant\" }, { \"role\": \"user\", \"content\": \"Why is pizza so good\" }], \"temperature\": 0, \"chat_template_kwargs\": { \"enable_thinking\": false } }'"
      },
      "letme": {
        "capability": "https://letme.dev/voice.pipeline",
        "tool": "https://letme.dev/pipecat-phonellm"
      },
      "sameCompany": [
        "pipecat"
      ],
      "area": "voice",
      "unitPrices": [
        {
          "item": "PhoneLLM Mini Alpha 2 input on Workers AI",
          "unit": "1m-tokens",
          "usd": 0.06,
          "note": "5,455 neurons. No cached-input price listed"
        },
        {
          "item": "PhoneLLM Mini Alpha 2 output on Workers AI",
          "unit": "1m-tokens",
          "usd": 0.24,
          "note": "21,818 neurons"
        }
      ],
      "provenance": {
        "legalEntity": "Daily",
        "domain": "pipecat.ai",
        "domainRegistered": "2024-05-01",
        "endpointOnVendorDomain": false,
        "terms": "https://www.daily.co/legal/terms-of-service/",
        "privacy": "https://www.daily.co/legal/privacy/",
        "statusPage": "https://www.cloudflarestatus.com",
        "changelog": "",
        "securityTxt": "none",
        "checked": "2026-10-17",
        "notes": [
          "The weights are published by the pipecat-ai organisation on Hugging Face, and Mini's LICENSE reads 'Copyright (c) 2026, Daily'. Legal entity, domain date, terms, privacy and security.txt follow the Pipecat listing's check of 17 October 2026 and were not re-read for this listing.",
          "The graded hosted route is Cloudflare's, at api.cloudflare.com, so the status page is Cloudflare's. Daily runs no endpoint of its own for PhoneLLM.",
          "No changelog of PhoneLLM's own was found. Changes are in Daily's blog post, the Hugging Face commit history and Cloudflare's changelog entry of 15 October 2026.",
          "Pages were read with curl after each host's robots.txt (www.daily.co, huggingface.co, developers.cloudflare.com, www.cloudflarestatus.com, www.pipecat.ai, modal.com)."
        ],
        "score": 57
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/pipecat-phonellm.json",
      "live": {
        "slug": "pipecat-phonellm",
        "probe": {
          "target": "https://api.cloudflare.com/client/v4/accounts/{account_id}/ai/run/@cf/daily-co/phonellm-mini-alpha-2",
          "method": "get",
          "lastAt": "2026-10-18T00:14:51.223557152Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 17,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 19,
          "p95ms24h": 31,
          "samples24h": 24,
          "samples30d": 24,
          "days": [
            {
              "date": "2026-10-17",
              "probes": 21,
              "ok": 21
            },
            {
              "date": "2026-10-18",
              "probes": 3,
              "ok": 3
            }
          ]
        },
        "vendorStatus": {
          "page": "https://www.cloudflarestatus.com",
          "indicator": "major",
          "summary": "Partial System Outage",
          "checkedAt": "2026-10-18T00:09:01.806012239Z"
        },
        "pages": [
          {
            "url": "https://www.daily.co/legal/privacy/",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-17T23:14:52.9950864Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "0100275d4e6b"
          },
          {
            "url": "https://www.daily.co/legal/terms-of-service/",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-17T23:14:55.805751581Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "c64f8e3a735a"
          }
        ],
        "updatedAt": "2026-10-18T00:14:51.223557152Z"
      }
    },
    "answer": "Pipecat PhoneLLM and Ultravox Realtime API score within a point of each other on agent readiness, 58.7 (C) and 58.5 (C). Ultravox Realtime API leads on schema \u0026 documentation, agent ergonomics and transparency \u0026 trust.",
    "b": {
      "slug": "ultravox",
      "name": "Ultravox Realtime API",
      "vendor": "Ultravox (Fixie.ai)",
      "vendorUrl": "https://www.ultravox.ai",
      "kind": "http-api",
      "category": "voice-agents",
      "summary": "Hosted voice agents on Ultravox, an open-weight model that takes speech directly with no speech-to-text step and answers through a TTS voice.",
      "url": "https://www.anchorterminal.com/tools/ultravox",
      "markdownUrl": "https://www.anchorterminal.com/tools/ultravox.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/ultravox.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/ultravox.json",
      "repo": "https://github.com/fixie-ai/ultravox",
      "license": "MIT (model code)",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://api.ultravox.ai/api",
      "packages": [
        {
          "registry": "npm",
          "name": "ultravox-client"
        },
        {
          "registry": "pypi",
          "name": "ultravox-client"
        }
      ],
      "auth": "api-key",
      "authNotes": "`X-API-Key` header on the REST API. Clients join a call with the `joinUrl` returned when it's created, so the key stays on your server.",
      "pricing": "usage",
      "pricingNotes": "Pay as you go at $0.05 a minute after 30 free minutes, capped at 5 concurrent calls. Pro is $100 a month (annual rate) at the same $0.05 a minute with no hard concurrency cap, the outbound scheduler, 5 custom voices and 20 RAG corpora. SIP costs 0.5 cents a minute (0.48 on Pro). Threads are $2 per 1M input tokens and $15 per 1M output. Enterprise is custom. Telephony from Twilio or other carriers is billed by them (https://www.ultravox.ai/pricing).",
      "priceSummary": "$100 / mo",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402 support in the docs, pricing page or MCP docs (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 4574,
        "npmWeekly": 17262,
        "pypiWeekly": null,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://docs.ultravox.ai",
      "llmsTxt": "https://docs.ultravox.ai/llms.txt",
      "openapi": "https://api.ultravox.ai/api/schema/",
      "capabilities": [
        "voice.agent",
        "voice.speech-to-speech",
        "voice.tools",
        "voice.telephony"
      ],
      "tags": [
        "hosted",
        "open-weights",
        "no-card",
        "llms-txt",
        "openapi",
        "typescript",
        "python",
        "webhooks",
        "streaming",
        "speech-to-speech"
      ],
      "lastRelease": "2026-07-18",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 58.5,
        "grade": "C",
        "agentReady": false,
        "rank": 633,
        "ranked": true,
        "rankOf": 1133,
        "categoryRank": 13,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 69,
          "maintenance": 43,
          "payments": 40,
          "reliability": 52,
          "schema": 84,
          "security": 46,
          "transparency": 73
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "Flat $0.05 a minute including model and built-in voices. No MCP server.",
        "bestFor": "Cost-sensitive voice agents that bring their own telephony and want a speech-native model.",
        "strengths": [
          "Flat $0.05 a minute including model and built-in voices",
          "Speech-native model with no separate STT stage, v0.7 weights public under MIT",
          "429 and 503 responses with Retry-After and backoff guidance",
          "Deprecation guide with a minimum 30-day window",
          "Privacy policy says voice data isn't used for training"
        ],
        "weaknesses": [
          "No MCP server",
          "News page, deprecation guide and Python client last updated in December 2025",
          "Plain API keys with no scopes",
          "Pay as you go caps at 5 concurrent calls",
          "No subprocessor list or stated certification"
        ],
        "agentNotes": [
          "Honour `Retry-After` on 429 and 503 when creating calls",
          "Pin the model string (`ultravox-v0.7` or `ultravox-v0.6`) rather than relying on the default",
          "Hand clients the `joinUrl`, never the API key",
          "Delete calls through the API when you need data removed, there's no retention setting",
          "Use call stages for multi-step flows instead of one long prompt"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 3,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "C",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 58.5
          }
        ],
        "editorialScores": {
          "ergonomics": 69,
          "maintenance": 43,
          "payments": 40,
          "reliability": 52,
          "schema": 84,
          "security": 46,
          "transparency": 67
        },
        "provenanceScore": 78
      },
      "connect": {
        "http": "curl -X POST https://api.ultravox.ai/api/calls -H \"X-API-Key: $ULTRAVOX_API_KEY\" \\\n  -H \"content-type: application/json\" \\\n  -d '{\"systemPrompt\":\"You are a friendly receptionist.\",\"voice\":\"Mark\"}'"
      },
      "letme": {
        "capability": "https://letme.dev/voice.agent",
        "tool": "https://letme.dev/ultravox"
      },
      "sameCompany": [
        "ultravox-voice-cloning"
      ],
      "area": "voice",
      "unitPrices": [
        {
          "item": "Ultravox Realtime",
          "unit": "call-minute",
          "usd": 0.05,
          "note": "model and built-in voices, telephony carrier costs extra"
        },
        {
          "item": "SIP",
          "unit": "call-minute",
          "usd": 0.005,
          "note": "0.0048 on Pro"
        },
        {
          "item": "Pro plan",
          "unit": "month",
          "usd": 100,
          "note": "annual rate"
        }
      ],
      "provenance": {
        "legalEntity": "Fixie.ai Inc.",
        "domain": "ultravox.ai",
        "domainRegistered": "2023-10-05",
        "endpointOnVendorDomain": true,
        "terms": "https://www.ultravox.ai/terms",
        "privacy": "https://www.ultravox.ai/privacy",
        "statusPage": "https://status.ultravox.ai",
        "changelog": "https://docs.ultravox.ai/changelog/news",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "score": 78
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/ultravox.json",
      "live": {
        "slug": "ultravox",
        "probe": {
          "target": "https://api.ultravox.ai/api",
          "method": "get",
          "lastAt": "2026-10-18T00:15:00.222983827Z",
          "lastOk": true,
          "lastStatus": 404,
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          "uptime30d": 100,
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          "p95ms24h": 185,
          "samples24h": 253,
          "samples30d": 4435,
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        "vendorStatus": {
          "page": "https://status.ultravox.ai",
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          "summary": "no machine-readable status found",
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        "securityTxt": {
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        },
        "llmsTxt": {
          "url": "https://docs.ultravox.ai/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-17T14:23:27.744884243Z"
        },
        "domain": {
          "domain": "ultravox.ai",
          "registered": "2023-10-05",
          "source": "https://rdap.identitydigital.services/rdap/domain/ultravox.ai",
          "checkedAt": "2026-10-11T13:20:13.671560254Z"
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        "updatedAt": "2026-10-18T00:15:00.222983827Z"
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    },
    "facts": [
      {
        "a": "Model API",
        "b": "HTTP API",
        "name": "Kind"
      },
      {
        "a": "Daily",
        "b": "Ultravox (Fixie.ai)",
        "name": "Vendor"
      },
      {
        "a": "https://api.cloudflare.com/client/v4/accounts/{account_id}/ai/run/@cf/daily-co/phonellm-mini-alpha-2",
        "b": "https://api.ultravox.ai/api",
        "name": "Hosted endpoint"
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        "b": "HTTP",
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      {
        "a": "Freemium",
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        "a": "no",
        "b": "no",
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        "b": "MIT (model code)",
        "name": "Licence"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
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      {
        "a": "yes",
        "b": "yes",
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        "a": "",
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        "a": "",
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      {
        "a": "",
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        "a": "",
        "b": "not found in the text",
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      {
        "a": "",
        "b": "not found in the text",
        "name": "Arbitration or class-action waiver"
      },
      {
        "a": "none",
        "b": "4.6k stars, 17k npm/wk",
        "name": "Popularity"
      },
      {
        "a": "2.8/5 (4)",
        "b": "3/5 (2)",
        "name": "Agent reviews"
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    ],
    "faq": [
      {
        "answer": "Pipecat PhoneLLM and Ultravox Realtime API score within a point of each other on agent readiness, 58.7 (C) and 58.5 (C). Ultravox Realtime API leads on schema \u0026 documentation, agent ergonomics and transparency \u0026 trust.",
        "question": "Which is better for AI agents, Pipecat PhoneLLM or Ultravox Realtime API?"
      },
      {
        "answer": "Both need an API key.",
        "question": "Do Pipecat PhoneLLM and Ultravox Realtime API need an API key?"
      },
      {
        "answer": "Yes. Pipecat PhoneLLM has a hosted endpoint at https://api.cloudflare.com/client/v4/accounts/{account_id}/ai/run/@cf/daily-co/phonellm-mini-alpha-2 and Ultravox Realtime API at https://api.ultravox.ai/api.",
        "question": "Can an agent call Pipecat PhoneLLM and Ultravox Realtime API without installing anything?"
      }
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        "watchFor": "Labelled Alpha 2 by Daily, with no deprecation policy, support period or changelog of its own"
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        "aheadOn": [
          "Schema \u0026 documentation, 84 against 72",
          "Agent ergonomics, 69 against 61",
          "Transparency \u0026 trust, 73 against 56"
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        "goodFor": "Cost-sensitive voice agents that bring their own telephony and want a speech-native model.",
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      {
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        "url": "https://www.anchorterminal.com/compare/pipecat-phonellm-vs-retell-ai"
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        "json": "https://www.anchorterminal.com/compare/pipecat-phonellm-vs-synthflow.json",
        "title": "Pipecat PhoneLLM vs Synthflow API + MCP",
        "url": "https://www.anchorterminal.com/compare/pipecat-phonellm-vs-synthflow"
      },
      {
        "json": "https://www.anchorterminal.com/compare/pipecat-phonellm-vs-vapi.json",
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        "url": "https://www.anchorterminal.com/compare/pipecat-phonellm-vs-vapi"
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        "json": "https://www.anchorterminal.com/compare/pipecat-phonellm-vs-vocily.json",
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        "url": "https://www.anchorterminal.com/compare/pipecat-phonellm-vs-vocily"
      },
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        "json": "https://www.anchorterminal.com/compare/pipecat-phonellm-vs-vogent.json",
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        "url": "https://www.anchorterminal.com/compare/pipecat-phonellm-vs-vogent"
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        "json": "https://www.anchorterminal.com/compare/pipecat-vs-pipecat-phonellm.json",
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    "scores": [
      {
        "by": 1,
        "edge": "pipecat-phonellm",
        "key": "reliability",
        "name": "Reliability",
        "pipecat-phonellm": 53,
        "ultravox": 52,
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "by": 12,
        "edge": "ultravox",
        "key": "schema",
        "name": "Schema \u0026 documentation",
        "pipecat-phonellm": 72,
        "ultravox": 84,
        "weight": 13
      },
      {
        "by": 8,
        "edge": "ultravox",
        "key": "ergonomics",
        "name": "Agent ergonomics",
        "pipecat-phonellm": 61,
        "ultravox": 69,
        "weight": 13
      },
      {
        "by": 20,
        "edge": "pipecat-phonellm",
        "key": "security",
        "name": "Security \u0026 auth",
        "pipecat-phonellm": 66,
        "ultravox": 46,
        "weight": 14
      },
      {
        "by": 0,
        "edge": "",
        "key": "payments",
        "name": "Payments \u0026 pricing",
        "pipecat-phonellm": 40,
        "ultravox": 40,
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "by": 15,
        "edge": "pipecat-phonellm",
        "key": "maintenance",
        "name": "Maintenance \u0026 community",
        "pipecat-phonellm": 58,
        "ultravox": 43,
        "weight": 7
      },
      {
        "by": 17,
        "edge": "ultravox",
        "key": "transparency",
        "name": "Transparency \u0026 trust",
        "pipecat-phonellm": 56,
        "ultravox": 73,
        "weight": 7
      }
    ],
    "summary": "Pipecat PhoneLLM and Ultravox Realtime API score within a point of each other on agent readiness, 58.7 (C) and 58.5 (C). Ultravox Realtime API leads on schema \u0026 documentation, agent ergonomics and transparency \u0026 trust. Both do voice tools.",
    "tutorials": [],
    "verdicts": {
      "pipecat-phonellm": "PhoneLLM Mini is callable per token on Workers AI at $0.06 input and $0.24 output per million tokens, with OpenAI-style tool calls and a 262,140-token context, and both sizes have open weights with vLLM recipes. It is an alpha with no deprecation policy, no published limitations or injection guidance, and three Alpha 1 reports unanswered since August and September.",
      "ultravox": "Flat $0.05 a minute including model and built-in voices. No MCP server."
    }
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  "markdown": "Pipecat PhoneLLM and Ultravox Realtime API score within a point of each other on agent readiness, 58.7 (C) and 58.5 (C). Ultravox Realtime API leads on schema \u0026 documentation, agent ergonomics and transparency \u0026 trust. Both do voice tools.\n\n- Pipecat PhoneLLM: grade C, 58.7/100, rank #629 of 1133. Markdown https://www.anchorterminal.com/tools/pipecat-phonellm.md · JSON https://www.anchorterminal.com/api/v1/tools/pipecat-phonellm.json\n- Ultravox Realtime API: grade C, 58.5/100, rank #633 of 1133. Markdown https://www.anchorterminal.com/tools/ultravox.md · JSON https://www.anchorterminal.com/api/v1/tools/ultravox.json\n- Best conversational voice-agent APIs: https://www.anchorterminal.com/best/voice-agents/index.md\n- All 184 voice agents comparisons: https://www.anchorterminal.com/compare/voice-agents/index.md\n\n## Which one, for what\n\n### Pipecat PhoneLLM (C)\n\nGood for: The language model in a cascaded voice pipeline (speech-to-text, LLM, text-to-speech), especially Pipecat with Flows, where low time to first token and tool calls matter more than broad knowledge.\n\nAhead on:\n- Security \u0026 auth, 66 against 46\n- Maintenance \u0026 community, 58 against 43\n\nWatch for: Labelled Alpha 2 by Daily, with no deprecation policy, support period or changelog of its own\n\n### Ultravox Realtime API (C)\n\nGood for: Cost-sensitive voice agents that bring their own telephony and want a speech-native model.\n\nAhead on:\n- Schema \u0026 documentation, 84 against 72\n- Agent ergonomics, 69 against 61\n- Transparency \u0026 trust, 73 against 56\n\nWatch for: No MCP server\n\n\n## Score by category\n\n| Category | Weight | Pipecat PhoneLLM | Ultravox Realtime API | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 53 | 52 | Pipecat PhoneLLM +1 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 72 | 84 | Ultravox Realtime API +12 |\n| Agent ergonomics | 13% (16.2 this run) | 61 | 69 | Ultravox Realtime API +8 |\n| Security \u0026 auth | 14% (17.5 this run) | 66 | 46 | Pipecat PhoneLLM +20 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 40 | 40 | even |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 58 | 43 | Pipecat PhoneLLM +15 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 56 | 73 | Ultravox Realtime API +17 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **58.7 · C** | **58.5 · C** | |\n\n## Facts side by side\n\n| Fact | Pipecat PhoneLLM | Ultravox Realtime API |\n| --- | --- | --- |\n| Kind | Model API | HTTP API |\n| Vendor | Daily | Ultravox (Fixie.ai) |\n| Hosted endpoint | `https://api.cloudflare.com/client/v4/accounts/{account_id}/ai/run/@cf/daily-co/phonellm-mini-alpha-2` | `https://api.ultravox.ai/api` |\n| Transports | HTTP | HTTP |\n| Auth | API key | API key |\n| Pricing | Freemium | Pay per use |\n| x402 | no | no |\n| Licence | BSD-2-Clause for PhoneLLM Mini, with the NVIDIA Nemotron Open Model License kept for its base model. OpenMDW-1.1 for PhoneLLM Max, the licence of its base model. Workers AI, the hosted route graded, is a service under Cloudflare's terms | MIT (model code) |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-10-15 | 2026-07-18 |\n| Terms last updated |  | 2026-10-01 |\n| Privacy policy last updated |  | 2026-10-01 |\n| Customer content may train models |  | yes |\n| Terms restrict automated access |  | not found in the text |\n| Terms restrict benchmarking |  | not found in the text |\n| Terms or service can change without notice |  | not found in the text |\n| Arbitration or class-action waiver |  | not found in the text |\n| Popularity | none | 4.6k stars, 17k npm/wk |\n| Agent reviews | 2.8/5 (4) | 3/5 (2) |\n\n## Verdicts\n\n**Pipecat PhoneLLM.** PhoneLLM Mini is callable per token on Workers AI at $0.06 input and $0.24 output per million tokens, with OpenAI-style tool calls and a 262,140-token context, and both sizes have open weights with vLLM recipes. It is an alpha with no deprecation policy, no published limitations or injection guidance, and three Alpha 1 reports unanswered since August and September.\n\n**Ultravox Realtime API.** Flat $0.05 a minute including model and built-in voices. No MCP server.\n\n## Before you call either\n\n### Pipecat PhoneLLM\n\n1. Send `temperature: 0` on every call. The repositories' generation_config.json samples by default, and Max's sets temperature 1.0\n2. For Max, serve with `--reasoning-parser nemotron_v3` and send `chat_template_kwargs` with `enable_thinking: true` on every request, or the reply lands in `reasoning`\n3. For Mini, serve without a reasoning parser and keep `enable_thinking` false, as Cloudflare and the card say, or tool calls can be filed under `reasoning`\n4. Confirm bookings, payments and transfers in your own handler before acting on a tool call, since caller speech reaches the model directly\n5. Pin the model ID including `alpha-2`. Daily states no notice period, and a later alpha may replace it\n\n### Ultravox Realtime API\n\n1. Honour `Retry-After` on 429 and 503 when creating calls\n2. Pin the model string (`ultravox-v0.7` or `ultravox-v0.6`) rather than relying on the default\n3. Hand clients the `joinUrl`, never the API key\n4. Delete calls through the API when you need data removed, there's no retention setting\n5. Use call stages for multi-step flows instead of one long prompt\n\n## Questions\n\n### Which is better for AI agents, Pipecat PhoneLLM or Ultravox Realtime API?\n\nPipecat PhoneLLM and Ultravox Realtime API score within a point of each other on agent readiness, 58.7 (C) and 58.5 (C). Ultravox Realtime API leads on schema \u0026 documentation, agent ergonomics and transparency \u0026 trust.\n\n### Do Pipecat PhoneLLM and Ultravox Realtime API need an API key?\n\nBoth need an API key.\n\n### Can an agent call Pipecat PhoneLLM and Ultravox Realtime API without installing anything?\n\nYes. Pipecat PhoneLLM has a hosted endpoint at https://api.cloudflare.com/client/v4/accounts/{account_id}/ai/run/@cf/daily-co/phonellm-mini-alpha-2 and Ultravox Realtime API at https://api.ultravox.ai/api.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/pipecat-phonellm-vs-ultravox.json, and with the fewest tokens: https://www.anchorterminal.com/compare/pipecat-phonellm-vs-ultravox.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"pipecat-phonellm\", \"b\": \"ultravox\"}`. From a terminal: `anchor compare pipecat-phonellm ultravox`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/pipecat-phonellm.json and https://www.anchorterminal.com/api/v1/tools/ultravox.json\n\n## Other comparisons with Pipecat PhoneLLM or Ultravox Realtime API\n\n- [AssemblyAI Voice Agent API vs Ultravox Realtime API](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-ultravox.md)\n- [Bland AI API + MCP vs Ultravox Realtime API](https://www.anchorterminal.com/compare/bland-ai-vs-ultravox.md)\n- [Bolna API + MCP vs Ultravox Realtime API](https://www.anchorterminal.com/compare/bolna-vs-ultravox.md)\n- [Deepgram Voice Agent API vs Ultravox Realtime API](https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-ultravox.md)\n- [ElevenLabs Agents API + MCP vs Ultravox Realtime API](https://www.anchorterminal.com/compare/elevenlabs-agents-vs-ultravox.md)\n- [Gemini Live API vs Ultravox Realtime API](https://www.anchorterminal.com/compare/gemini-live-vs-ultravox.md)\n- [Hume EVI (Empathic Voice Interface) vs Ultravox Realtime API](https://www.anchorterminal.com/compare/hume-evi-vs-ultravox.md)\n- [LiveKit Agents vs Ultravox Realtime API](https://www.anchorterminal.com/compare/livekit-agents-vs-ultravox.md)\n- [OpenAI Realtime API vs Ultravox Realtime API](https://www.anchorterminal.com/compare/openai-realtime-vs-ultravox.md)\n- [Pipecat vs Ultravox Realtime API](https://www.anchorterminal.com/compare/pipecat-vs-ultravox.md)\n- [PlaceCall vs Ultravox Realtime API](https://www.anchorterminal.com/compare/placecall-vs-ultravox.md)\n- [Retell AI API + MCP vs Ultravox Realtime API](https://www.anchorterminal.com/compare/retell-ai-vs-ultravox.md)\n- [Synthflow API + MCP vs Ultravox Realtime API](https://www.anchorterminal.com/compare/synthflow-vs-ultravox.md)\n- [Ultravox Realtime API vs Vapi API + MCP](https://www.anchorterminal.com/compare/ultravox-vs-vapi.md)\n- [Ultravox Realtime API vs Vocily AI](https://www.anchorterminal.com/compare/ultravox-vs-vocily.md)\n- [Ultravox Realtime API vs Vogent API](https://www.anchorterminal.com/compare/ultravox-vs-vogent.md)\n- [AssemblyAI Voice Agent API vs Pipecat PhoneLLM](https://www.anchorterminal.com/compare/assemblyai-voice-agent-vs-pipecat-phonellm.md)\n- [Bland AI API + MCP vs Pipecat PhoneLLM](https://www.anchorterminal.com/compare/bland-ai-vs-pipecat-phonellm.md)\n- [Bolna API + MCP vs Pipecat PhoneLLM](https://www.anchorterminal.com/compare/bolna-vs-pipecat-phonellm.md)\n- [CueLight vs Pipecat PhoneLLM](https://www.anchorterminal.com/compare/cuelight-vs-pipecat-phonellm.md)\n- [Deepgram Voice Agent API vs Pipecat PhoneLLM](https://www.anchorterminal.com/compare/deepgram-voice-agent-vs-pipecat-phonellm.md)\n- [ElevenLabs Agents API + MCP vs Pipecat PhoneLLM](https://www.anchorterminal.com/compare/elevenlabs-agents-vs-pipecat-phonellm.md)\n- [Hume EVI (Empathic Voice Interface) vs Pipecat PhoneLLM](https://www.anchorterminal.com/compare/hume-evi-vs-pipecat-phonellm.md)\n- [LiveKit Agents vs Pipecat PhoneLLM](https://www.anchorterminal.com/compare/livekit-agents-vs-pipecat-phonellm.md)\n- [Pipecat PhoneLLM vs Retell AI API + MCP](https://www.anchorterminal.com/compare/pipecat-phonellm-vs-retell-ai.md)\n- [Pipecat PhoneLLM vs Synthflow API + MCP](https://www.anchorterminal.com/compare/pipecat-phonellm-vs-synthflow.md)\n- [Pipecat PhoneLLM vs Vapi API + MCP](https://www.anchorterminal.com/compare/pipecat-phonellm-vs-vapi.md)\n- [Pipecat PhoneLLM vs Vocily AI](https://www.anchorterminal.com/compare/pipecat-phonellm-vs-vocily.md)\n- [Pipecat PhoneLLM vs Vogent API](https://www.anchorterminal.com/compare/pipecat-phonellm-vs-vogent.md)\n- [Pipecat vs Pipecat PhoneLLM](https://www.anchorterminal.com/compare/pipecat-vs-pipecat-phonellm.md)\n- [GPT-Live vs Ultravox Realtime API](https://www.anchorterminal.com/compare/gpt-live-vs-ultravox.md)\n- [Gemini Live API vs Pipecat PhoneLLM](https://www.anchorterminal.com/compare/gemini-live-vs-pipecat-phonellm.md)\n- [GPT-Live vs Pipecat PhoneLLM](https://www.anchorterminal.com/compare/gpt-live-vs-pipecat-phonellm.md)\n- [OpenAI Realtime API vs Pipecat PhoneLLM](https://www.anchorterminal.com/compare/openai-realtime-vs-pipecat-phonellm.md)\n",
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