{
  "data": {
    "a": {
      "slug": "earendil-pi",
      "name": "Pi",
      "vendor": "Earendil",
      "vendorUrl": "https://pi.dev",
      "kind": "harness",
      "category": "agent-harnesses",
      "summary": "Pi is an open-source terminal coding agent from Earendil, run on the owner's machine with any of 15 or more model providers. It has interactive, print, JSON and RPC modes, a TypeScript SDK and a built-in MCP client.",
      "url": "https://www.anchorterminal.com/tools/earendil-pi",
      "markdownUrl": "https://www.anchorterminal.com/tools/earendil-pi.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/earendil-pi.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/earendil-pi.json",
      "repo": "https://github.com/earendil-works/pi",
      "license": "MIT",
      "transports": [],
      "packages": [
        {
          "registry": "npm",
          "name": "@earendil-works/pi-coding-agent"
        }
      ],
      "auth": "none",
      "authNotes": "No Pi account needed. Model providers are connected with `/login` (a subscription or an API key, stored in `~/.pi/agent/auth.json`) or with environment variables such as `ANTHROPIC_API_KEY`. MCP servers take headers, bearer tokens from the environment or OAuth, with tokens kept in `~/.pi/agent/mcp-auth.json`. Radius, the optional hosted gateway, needs its own sign-in or `RADIUS_API_KEY`.",
      "pricing": "free",
      "pricingNotes": "Free and MIT, with no paid edition of the harness. The owner pays the model provider. Radius, Earendil's optional hosted gateway, is an early alpha sold by prepaid credits, and no public price list was found (checked 2026-10-08).",
      "priceSummary": "Free · OSS",
      "where": "local",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the repository or the docs (checked 2026-10-08).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 113417,
        "npmWeekly": 5201697,
        "pypiWeekly": null,
        "asOf": "2026-10-08"
      },
      "docsUrl": "https://pi.dev/docs/latest",
      "capabilities": [
        "agent.harness",
        "agent.mcp-client"
      ],
      "tags": [
        "open-source",
        "local",
        "free",
        "no-card",
        "typescript",
        "mcp",
        "json-output",
        "rpc",
        "no-sandbox"
      ],
      "lastRelease": "2026-10-07",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 68.4,
        "grade": "B",
        "agentReady": false,
        "rank": 170,
        "ranked": true,
        "rankOf": 629,
        "categoryRank": 6,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 76,
          "maintenance": 87,
          "payments": 60,
          "reliability": 75,
          "schema": 84,
          "security": 61,
          "transparency": 64
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-08"
        },
        "negative": -4,
        "negativeNotes": [
          "2026-06-08. GHSA-jfgx-wxx8-mp94 (CVE-2026-54328, high). Temporary extension installs used predictable paths under the system temp directory, so another local user on a shared Linux host could plant extension code that Pi then loaded. Fixed in 0.78.1. Fixed, published and four months old, -2. https://github.com/earendil-works/pi/security/advisories/GHSA-jfgx-wxx8-mp94",
          "2026-06-08. GHSA-mqxh-6gq7-558m (CVE-2026-54325, medium). Before 0.79.0 Pi loaded a repository's `.pi` settings and extensions without asking, so starting it in a cloned repository could run that repository's code. Fixed in 0.79.0 with project trust. Fixed and published, -2. https://github.com/earendil-works/pi/security/advisories/GHSA-mqxh-6gq7-558m",
          "2026-06-08. GHSA-7v5m-pr3q-6453 (CVE-2026-54326, low, XSS in HTML session exports) and GHSA-r95r-rj6r-c39x (CVE-2026-54327, low, a race in `auth.json` permissions). Both fixed in 0.78.1. Recorded without a deduction. https://github.com/earendil-works/pi/security/advisories"
        ],
        "verdict": "Four default tools, a JSONL event stream, an RPC mode and MCP tools kept out of the model's declarations by default keep context small and scripting simple. Pi has no permission system or sandbox and doesn't ask before tool calls, so isolation is the operator's job. Version 1.0.0 is dated 1 October 2026.",
        "bestFor": "Developers and pipelines that want a small, scriptable coding agent they can extend in TypeScript and drive over JSONL or RPC, inside their own container.",
        "strengths": [
          "Four default tools (read, bash, edit, write), with MCP tools reachable through codemode scripts and not declared to the model by default",
          "`--mode json` streams JSONL events and `--mode rpc` takes JSONL commands, both documented record by record, with a Python client example",
          "Built-in MCP client for stdio and streamable HTTP servers with OAuth, per-tool exposure settings and a conformance job in CI",
          "Project trust stops a repository's `.pi` settings, extensions and MCP servers loading until approved, and non-interactive modes skip them by default",
          "npm releases carry SLSA provenance from GitHub Actions trusted publishing, and the installer pins transitive dependencies"
        ],
        "weaknesses": [
          "No permission system or sandbox. Tool calls run with the user's rights and without an approval prompt",
          "An anonymous install and update ping to pi.dev and a latest-version request are on by default",
          "Four advisories published on 8 June 2026, one rated high and one medium, all fixed by 0.79.0",
          "No privacy policy for pi.dev or the CLI found, and pi.dev has no security.txt",
          "Eight of the last 15 CI runs on main failed on 7 and 8 October 2026, and a breaking provider rename shipped in patch release 1.0.3"
        ],
        "agentNotes": [
          "Run Pi inside a container or VM for unattended work. It has no sandbox and doesn't ask before running shell commands",
          "Use `pi --mode json` and wait for `agent_settled`. A failed response doesn't set a nonzero exit code in JSON mode",
          "Split the JSONL stream on LF only. Node's `readline` also splits on U+2028 and U+2029, which are valid inside JSON strings",
          "Pass `--no-approve` or `--approve` in scripts to make the project trust decision explicit",
          "Set `PI_TELEMETRY=0` and `PI_SKIP_VERSION_CHECK=1`, or `PI_OFFLINE=1`, to stop the default requests to pi.dev"
        ],
        "metrics": {
          "kind": "local",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 68.4
          }
        ],
        "editorialScores": {
          "ergonomics": 76,
          "maintenance": 87,
          "payments": 60,
          "reliability": 75,
          "schema": 84,
          "security": 61,
          "transparency": 64
        },
        "provenanceScore": 63
      },
      "connect": {
        "install": "curl -fsSL https://pi.dev/install.sh | sh   # or: npm install -g --ignore-scripts @earendil-works/pi-coding-agent",
        "headless": {
          "command": "pi --mode json --no-session --no-approve \"$TASK\"",
          "env": {
            "PI_SKIP_VERSION_CHECK": "1",
            "PI_TELEMETRY": "0"
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/agent.harness",
        "tool": "https://letme.dev/earendil-pi"
      },
      "area": "frameworks",
      "provenance": {
        "legalEntity": "Earendil Inc.",
        "domain": "pi.dev",
        "domainRegistered": "2024-01-30",
        "endpointOnVendorDomain": null,
        "terms": "",
        "privacy": "",
        "statusPage": "",
        "changelog": "https://pi.dev/changelog",
        "securityTxt": "none",
        "checked": "2026-10-08",
        "notes": [
          "The pi.dev and earendil.com footers read Earendil Inc. The Radius alpha terms of 1 September 2026 name Earendil Works Co., and the README calls the company Earendil Works.",
          "We found no terms or privacy page for pi.dev or the CLI. pi.dev/terms, pi.dev/privacy and earendil.com/privacy return 404. Terms exist only for Radius, at radius.earendil.com/terms.",
          "pi.dev/.well-known/security.txt and earendil.com/.well-known/security.txt return 404. SECURITY.md gives security@earendil.com and GitHub private reporting.",
          "RDAP for pi.dev gives a registration date of 2024-01-30 with Cloudflare as registrar. The README says the domain was donated by exe.dev.",
          "The repository moved from badlogic/pi-mono to earendil-works/pi, and the npm package from @mariozechner/pi-coding-agent to @earendil-works/pi-coding-agent at 0.74.0, per the advisories."
        ],
        "score": 63
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/earendil-pi.json",
      "live": {
        "slug": "earendil-pi",
        "versions": [
          {
            "registry": "github",
            "name": "earendil-works/pi",
            "version": "v1.1.0",
            "released": "2026-10-07",
            "seenAt": "2026-10-08T16:09:44.573412777Z"
          },
          {
            "registry": "npm",
            "name": "@earendil-works/pi-coding-agent",
            "version": "1.1.0",
            "seenAt": "2026-10-08T16:09:41.369786574Z"
          }
        ],
        "githubStars": 113482,
        "npmWeekly": 5201697,
        "securityTxt": {
          "url": "https://pi.dev/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-08T15:38:42.51766104Z"
        },
        "pages": [
          {
            "url": "https://pi.dev/changelog",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-08T18:22:53.741589246Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "82f9cb8bddf7"
          }
        ],
        "updatedAt": "2026-10-08T18:22:53.741589246Z"
      }
    },
    "answer": "Pi scores 68.4 (B) on agent readiness against GitHub Copilot CLI's 57.6 (C), and leads in 6 of 7 scored categories.",
    "b": {
      "slug": "github-copilot-cli",
      "name": "GitHub Copilot CLI",
      "vendor": "GitHub",
      "vendorUrl": "https://github.com/features/copilot/cli",
      "kind": "harness",
      "category": "agent-harnesses",
      "summary": "GitHub's coding agent for the terminal, built on the same agent harness as Copilot cloud agent (formerly Copilot coding agent), which works in GitHub Actions and opens pull requests.",
      "url": "https://www.anchorterminal.com/tools/github-copilot-cli",
      "markdownUrl": "https://www.anchorterminal.com/tools/github-copilot-cli.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/github-copilot-cli.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/github-copilot-cli.json",
      "repo": "https://github.com/github/copilot-cli",
      "license": "Proprietary, under the licence in the repository's `LICENSE.md`. Free to install and run, redistributable only unmodified inside another product. The repository holds the README, changelog and install script, not the source",
      "transports": [],
      "packages": [
        {
          "registry": "npm",
          "name": "@github/copilot"
        }
      ],
      "auth": "mixed",
      "authNotes": "`/login` with a GitHub account, or a fine-grained personal access token with the Copilot Requests permission in `GH_TOKEN` or `GITHUB_TOKEN`. Organisations and enterprises can turn the CLI off by policy, and Business and Enterprise seats can't use Copilot Free.",
      "pricing": "freemium",
      "pricingNotes": "Copilot Free ($0, no card) includes the CLI and agent mode with 50 chat requests a month. Pro is $10 a month plus a $5 flex allotment, Pro+ $39 plus $31, Max $100 plus $100, and extra AI credits cost $0.01 each. Business and Enterprise prices aren't on the plans page. Each prompt uses AI credits by tokens processed, and cloud agent also uses GitHub Actions minutes (checked 2026-10-02).",
      "priceSummary": "$0.01 / credit",
      "where": "local",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the docs, the plans page or the changelog (checked 2026-10-02).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 11000,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-10-02"
      },
      "docsUrl": "https://docs.github.com/en/copilot/concepts/agents/about-copilot-cli",
      "llmsTxt": "https://docs.github.com/llms.txt",
      "capabilities": [
        "agent.harness",
        "agent.mcp-client",
        "agent.multi-agent"
      ],
      "tags": [
        "official",
        "harness",
        "coding-agent",
        "cli",
        "closed-source",
        "mcp",
        "llms-txt",
        "free-tier",
        "no-card",
        "hosted",
        "status-page"
      ],
      "lastRelease": "2026-10-01",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 57.6,
        "grade": "C",
        "agentReady": false,
        "rank": 415,
        "ranked": true,
        "rankOf": 629,
        "categoryRank": 13,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 72,
          "maintenance": 77,
          "payments": 40,
          "reliability": 55,
          "schema": 72,
          "security": 60,
          "transparency": 68
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": -5,
        "negativeNotes": [
          "2026-09-22. 1.0.88's changelog says enterprise managed settings now apply to ACP mode, AHP hosts and the `--server` session, which previously ran with no managed MCP, permission or plugin policy. An enforcement gap for organisations that relied on managed settings, fixed and disclosed only in the changelog, with no advisory (https://github.com/github/copilot-cli/blob/main/changelog.md). -2",
          "2026-05-11. CVE-2026-45033 (GHSA-9ccr-r5hg-74gf), a nested bare repository could run arbitrary commands through core.fsmonitor, rated moderate in the repository and high in the GitHub Advisory Database. Fixed and published, inside six months (https://github.com/advisories/GHSA-9ccr-r5hg-74gf). -2",
          "2026-03-06. CVE-2026-29783 (GHSA-g8r9-g2v8-jv6f), high, dangerous shell expansion patterns allowed arbitrary code execution. Fixed and published, older than six months (https://github.com/advisories/GHSA-g8r9-g2v8-jv6f). -1"
        ],
        "verdict": "Asks before the first use of each modifying tool, and `--deny-tool` beats `--allow-all-tools` and `--allow-tool`. Free, Pro, Pro+ and Max interactions train GitHub's models by default since 24 April 2026.",
        "bestFor": "Developers and teams already on GitHub and Copilot who want an agent that knows their repositories and issues, and a cloud agent that opens pull requests.",
        "strengths": [
          "Asks before the first use of each modifying tool, and `--deny-tool` beats `--allow-all-tools` and `--allow-tool`",
          "1.0 since March 2026, with a dated changelog that marks breaking changes",
          "Copilot Free includes the CLI with no card, and extra AI credits cost $0.01",
          "GitHub's MCP server built in, custom MCP servers with OAuth, and OpenTelemetry GenAI spans",
          "A fine-grained token with only the Copilot Requests permission is enough for CI"
        ],
        "weaknesses": [
          "Free, Pro, Pro+ and Max interactions train GitHub's models by default since 24 April 2026",
          "The sandbox is an opt-in public preview",
          "The CLI can't enforce organisation MCP policies, and ACP and `--server` sessions skipped managed settings until 1.0.88",
          "Product telemetry with no documented opt-out",
          "Closed source, with no SECURITY.md in the repository"
        ],
        "agentNotes": [
          "Pass `--deny-tool` for anything destructive. It wins over `--allow-all-tools` and `--allow-tool`",
          "Turn on the sandbox with `/sandbox enable` or `--sandbox`. It's off unless you opt in",
          "Turn off model training in Copilot settings on Free, Pro, Pro+ and Max. It's on by default since 24 April 2026",
          "Run 1.0.88 or later where enterprise policy matters. Earlier versions ran ACP and `--server` sessions without managed settings",
          "Use a fine-grained token with only the Copilot Requests permission in `GH_TOKEN` for CI"
        ],
        "metrics": {
          "kind": "local",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 2.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "C",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 57.6
          }
        ],
        "editorialScores": {
          "ergonomics": 72,
          "maintenance": 77,
          "payments": 40,
          "reliability": 55,
          "schema": 72,
          "security": 60,
          "transparency": 49
        },
        "provenanceScore": 86
      },
      "connect": {
        "install": "npm i -g @github/copilot   # or: brew install copilot-cli",
        "headless": {
          "run": "copilot -p \"fix the failing test\" --allow-tool 'write' --deny-tool 'shell(git push)'"
        }
      },
      "letme": {
        "capability": "https://letme.dev/agent.harness",
        "tool": "https://letme.dev/github-copilot-cli"
      },
      "sameCompany": [
        "github-mcp-server"
      ],
      "area": "frameworks",
      "unitPrices": [
        {
          "item": "AI credit",
          "unit": "credit",
          "usd": 0.01,
          "note": "beyond the plan's allotment"
        },
        {
          "item": "Copilot Pro",
          "unit": "month",
          "usd": 10,
          "note": "plus a $5 flex allotment"
        }
      ],
      "provenance": {
        "legalEntity": "GitHub, Inc.",
        "domain": "github.com",
        "domainRegistered": "2007-10-09",
        "domainNote": "github.com publishes a security.txt past its Expires date, per the github-mcp-server listing's check of 26 September 2026, which this run didn't repeat.",
        "endpointOnVendorDomain": null,
        "terms": "https://docs.github.com/en/site-policy/github-terms/github-terms-of-service",
        "privacy": "https://docs.github.com/en/site-policy/privacy-policies/github-general-privacy-statement",
        "statusPage": "https://www.githubstatus.com",
        "changelog": "https://github.com/github/copilot-cli/blob/main/changelog.md",
        "securityTxt": "expired",
        "checked": "2026-10-01",
        "score": 86
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/github-copilot-cli.json",
      "live": {
        "slug": "github-copilot-cli",
        "vendorStatus": {
          "page": "https://www.githubstatus.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-08T19:06:40.349190439Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "github/copilot-cli",
            "version": "v1.0.93",
            "released": "2026-10-07",
            "seenAt": "2026-10-08T16:13:01.111878415Z"
          },
          {
            "registry": "npm",
            "name": "@github/copilot",
            "version": "1.0.93",
            "seenAt": "2026-10-08T16:12:56.848839995Z"
          }
        ],
        "githubStars": 11247,
        "npmWeekly": 1723666,
        "securityTxt": {
          "url": "https://github.com/.well-known/security.txt",
          "state": "valid",
          "expires": "2026-11-07T15:38:36z",
          "checkedAt": "2026-10-08T15:38:36.350524759Z"
        },
        "llmsTxt": {
          "url": "https://docs.github.com/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-08T14:00:27.283561922Z"
        },
        "domain": {
          "domain": "github.com",
          "registered": "2007-10-09",
          "source": "https://rdap.verisign.com/com/v1/domain/github.com",
          "checkedAt": "2026-10-04T13:05:18.320609382Z"
        },
        "pages": [
          {
            "url": "https://raw.githubusercontent.com/github/copilot-cli/main/changelog.md",
            "kind": "deprecations",
            "status": 304,
            "checkedAt": "2026-10-08T18:24:13.920334058Z",
            "changedAt": "2026-10-07T18:09:04.724332812Z",
            "fingerprint": "396d86e99c68"
          },
          {
            "url": "https://docs.github.com/en/site-policy/privacy-policies/github-general-privacy-statement",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-08T18:18:49.019338599Z",
            "changedAt": "2026-10-08T18:18:49.019338599Z",
            "fingerprint": "552ebe870f5c"
          },
          {
            "url": "https://docs.github.com/en/site-policy/github-terms/github-terms-of-service",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-08T18:18:46.347641375Z",
            "changedAt": "2026-10-08T18:18:46.347641375Z",
            "fingerprint": "f4bfd10fa079"
          }
        ],
        "updatedAt": "2026-10-08T19:06:40.349190439Z"
      }
    },
    "facts": [
      {
        "a": "Agent harness",
        "b": "Agent harness",
        "name": "Kind"
      },
      {
        "a": "Earendil",
        "b": "GitHub",
        "name": "Vendor"
      },
      {
        "a": "no (local only)",
        "b": "no (local only)",
        "name": "Hosted endpoint"
      },
      {
        "a": "",
        "b": "",
        "name": "Transports"
      },
      {
        "a": "None",
        "b": "OAuth or key",
        "name": "Auth"
      },
      {
        "a": "Free",
        "b": "Freemium",
        "name": "Pricing"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "MIT",
        "b": "Proprietary, under the licence in the repository's `LICENSE.md`. Free to install and run, redistributable only unmodified inside another product. The repository holds the README, changelog and install script, not the source",
        "name": "Licence"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "no",
        "b": "yes",
        "name": "llms.txt"
      },
      {
        "a": "2026-10-07",
        "b": "2026-10-01",
        "name": "Last release"
      },
      {
        "a": "no document linked",
        "b": "2026-04-27",
        "name": "Terms last updated"
      },
      {
        "a": "no document linked",
        "b": "2026-04-27",
        "name": "Privacy policy last updated"
      },
      {
        "a": "",
        "b": "yes, with an opt-out",
        "name": "Customer content may train models"
      },
      {
        "a": "",
        "b": "yes",
        "name": "Terms restrict automated access"
      },
      {
        "a": "",
        "b": "not found in the text",
        "name": "Terms restrict benchmarking"
      },
      {
        "a": "",
        "b": "yes",
        "name": "Terms or service can change without notice"
      },
      {
        "a": "",
        "b": "not found in the text",
        "name": "Arbitration or class-action waiver"
      },
      {
        "a": "113k stars, 5.2M npm/wk",
        "b": "11k stars",
        "name": "Popularity"
      },
      {
        "a": "none",
        "b": "2.5/5 (2)",
        "name": "Agent reviews"
      }
    ],
    "faq": [
      {
        "answer": "Pi scores 68.4 (B) on agent readiness against GitHub Copilot CLI's 57.6 (C), and leads in 6 of 7 scored categories.",
        "question": "Which is better for AI agents, Pi or GitHub Copilot CLI?"
      },
      {
        "answer": "Pi is open source (MIT). No open-source release is listed for GitHub Copilot CLI.",
        "question": "Are Pi and GitHub Copilot CLI open source?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Reliability, 75 against 55",
          "Schema \u0026 documentation, 84 against 72",
          "Payments \u0026 pricing, 60 against 40",
          "Maintenance \u0026 community, 87 against 77"
        ],
        "also": [
          "No key needed to call it",
          "Open source"
        ],
        "goodFor": "Developers and pipelines that want a small, scriptable coding agent they can extend in TypeScript and drive over JSONL or RPC, inside their own container.",
        "slug": "earendil-pi",
        "watchFor": "No permission system or sandbox. Tool calls run with the user's rights and without an approval prompt"
      },
      {
        "aheadOn": null,
        "also": null,
        "goodFor": "Developers and teams already on GitHub and Copilot who want an agent that knows their repositories and issues, and a cloud agent that opens pull requests.",
        "slug": "github-copilot-cli",
        "watchFor": "Free, Pro, Pro+ and Max interactions train GitHub's models by default since 24 April 2026"
      }
    ],
    "job": {
      "capability": "agent.harness",
      "name": "Agent harness"
    },
    "others": [
      {
        "json": "https://www.anchorterminal.com/compare/aider-vs-earendil-pi.json",
        "title": "Aider vs Pi",
        "url": "https://www.anchorterminal.com/compare/aider-vs-earendil-pi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/aider-vs-github-copilot-cli.json",
        "title": "Aider vs GitHub Copilot CLI",
        "url": "https://www.anchorterminal.com/compare/aider-vs-github-copilot-cli"
      },
      {
        "json": "https://www.anchorterminal.com/compare/amp-vs-earendil-pi.json",
        "title": "Amp vs Pi",
        "url": "https://www.anchorterminal.com/compare/amp-vs-earendil-pi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/amp-vs-github-copilot-cli.json",
        "title": "Amp vs GitHub Copilot CLI",
        "url": "https://www.anchorterminal.com/compare/amp-vs-github-copilot-cli"
      },
      {
        "json": "https://www.anchorterminal.com/compare/claude-code-vs-earendil-pi.json",
        "title": "Claude Code vs Pi",
        "url": "https://www.anchorterminal.com/compare/claude-code-vs-earendil-pi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/claude-code-vs-github-copilot-cli.json",
        "title": "Claude Code vs GitHub Copilot CLI",
        "url": "https://www.anchorterminal.com/compare/claude-code-vs-github-copilot-cli"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cline-vs-earendil-pi.json",
        "title": "Cline vs Pi",
        "url": "https://www.anchorterminal.com/compare/cline-vs-earendil-pi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cline-vs-github-copilot-cli.json",
        "title": "Cline vs GitHub Copilot CLI",
        "url": "https://www.anchorterminal.com/compare/cline-vs-github-copilot-cli"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cursor-cli-vs-earendil-pi.json",
        "title": "Cursor CLI vs Pi",
        "url": "https://www.anchorterminal.com/compare/cursor-cli-vs-earendil-pi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cursor-cli-vs-github-copilot-cli.json",
        "title": "Cursor CLI vs GitHub Copilot CLI",
        "url": "https://www.anchorterminal.com/compare/cursor-cli-vs-github-copilot-cli"
      },
      {
        "json": "https://www.anchorterminal.com/compare/devin-vs-earendil-pi.json",
        "title": "Devin vs Pi",
        "url": "https://www.anchorterminal.com/compare/devin-vs-earendil-pi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/devin-vs-github-copilot-cli.json",
        "title": "Devin vs GitHub Copilot CLI",
        "url": "https://www.anchorterminal.com/compare/devin-vs-github-copilot-cli"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-gemini-cli.json",
        "title": "Pi vs Gemini CLI",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-gemini-cli"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-goose.json",
        "title": "Pi vs goose",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-goose"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-kiro-cli.json",
        "title": "Pi vs Kiro CLI",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-kiro-cli"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-openai-codex.json",
        "title": "Pi vs OpenAI Codex",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-openai-codex"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-opencode.json",
        "title": "Pi vs OpenCode",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-opencode"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-openhands.json",
        "title": "Pi vs OpenHands",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-openhands"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-prime-agent.json",
        "title": "Pi vs Prime Agent",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-prime-agent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-qwen-code.json",
        "title": "Pi vs Qwen Code",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-qwen-code"
      },
      {
        "json": "https://www.anchorterminal.com/compare/gemini-cli-vs-github-copilot-cli.json",
        "title": "Gemini CLI vs GitHub Copilot CLI",
        "url": "https://www.anchorterminal.com/compare/gemini-cli-vs-github-copilot-cli"
      },
      {
        "json": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-goose.json",
        "title": "GitHub Copilot CLI vs goose",
        "url": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-goose"
      },
      {
        "json": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-kiro-cli.json",
        "title": "GitHub Copilot CLI vs Kiro CLI",
        "url": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-kiro-cli"
      },
      {
        "json": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-openai-codex.json",
        "title": "GitHub Copilot CLI vs OpenAI Codex",
        "url": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-openai-codex"
      },
      {
        "json": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-opencode.json",
        "title": "GitHub Copilot CLI vs OpenCode",
        "url": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-opencode"
      },
      {
        "json": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-openhands.json",
        "title": "GitHub Copilot CLI vs OpenHands",
        "url": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-openhands"
      },
      {
        "json": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-prime-agent.json",
        "title": "GitHub Copilot CLI vs Prime Agent",
        "url": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-prime-agent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-qwen-code.json",
        "title": "GitHub Copilot CLI vs Qwen Code",
        "url": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-qwen-code"
      },
      {
        "json": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-paperclip.json",
        "title": "GitHub Copilot CLI vs Paperclip",
        "url": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-paperclip"
      }
    ],
    "scores": [
      {
        "by": 20,
        "earendil-pi": 75,
        "edge": "earendil-pi",
        "github-copilot-cli": 55,
        "key": "reliability",
        "name": "Reliability",
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "by": 12,
        "earendil-pi": 84,
        "edge": "earendil-pi",
        "github-copilot-cli": 72,
        "key": "schema",
        "name": "Schema \u0026 documentation",
        "weight": 13
      },
      {
        "by": 4,
        "earendil-pi": 76,
        "edge": "earendil-pi",
        "github-copilot-cli": 72,
        "key": "ergonomics",
        "name": "Agent ergonomics",
        "weight": 13
      },
      {
        "by": 1,
        "earendil-pi": 61,
        "edge": "earendil-pi",
        "github-copilot-cli": 60,
        "key": "security",
        "name": "Security \u0026 auth",
        "weight": 14
      },
      {
        "by": 20,
        "earendil-pi": 60,
        "edge": "earendil-pi",
        "github-copilot-cli": 40,
        "key": "payments",
        "name": "Payments \u0026 pricing",
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "by": 10,
        "earendil-pi": 87,
        "edge": "earendil-pi",
        "github-copilot-cli": 77,
        "key": "maintenance",
        "name": "Maintenance \u0026 community",
        "weight": 7
      },
      {
        "by": 4,
        "earendil-pi": 64,
        "edge": "github-copilot-cli",
        "github-copilot-cli": 68,
        "key": "transparency",
        "name": "Transparency \u0026 trust",
        "weight": 7
      }
    ],
    "summary": "Pi scores 68.4 (B) on agent readiness against GitHub Copilot CLI's 57.6 (C), and leads in 6 of 7 scored categories. Both do agent harness.",
    "verdicts": {
      "earendil-pi": "Four default tools, a JSONL event stream, an RPC mode and MCP tools kept out of the model's declarations by default keep context small and scripting simple. Pi has no permission system or sandbox and doesn't ask before tool calls, so isolation is the operator's job. Version 1.0.0 is dated 1 October 2026.",
      "github-copilot-cli": "Asks before the first use of each modifying tool, and `--deny-tool` beats `--allow-all-tools` and `--allow-tool`. Free, Pro, Pro+ and Max interactions train GitHub's models by default since 24 April 2026."
    }
  },
  "kind": "anchor.page",
  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "https://www.anchorterminal.com/compare/earendil-pi-vs-github-copilot-cli",
    "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-github-copilot-cli.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
    "markdown": "https://www.anchorterminal.com/compare/earendil-pi-vs-github-copilot-cli.md",
    "slim": "https://www.anchorterminal.com/compare/earendil-pi-vs-github-copilot-cli.min.md"
  },
  "markdown": "Pi scores 68.4 (B) on agent readiness against GitHub Copilot CLI's 57.6 (C), and leads in 6 of 7 scored categories. Both do agent harness.\n\n- Pi: grade B, 68.4/100, rank #170 of 629. Markdown https://www.anchorterminal.com/tools/earendil-pi.md · JSON https://www.anchorterminal.com/api/v1/tools/earendil-pi.json\n- GitHub Copilot CLI: grade C, 57.6/100, rank #415 of 629. Markdown https://www.anchorterminal.com/tools/github-copilot-cli.md · JSON https://www.anchorterminal.com/api/v1/tools/github-copilot-cli.json\n\n## Which one, for what\n\n### Pi (B)\n\nGood for: Developers and pipelines that want a small, scriptable coding agent they can extend in TypeScript and drive over JSONL or RPC, inside their own container.\n\nAhead on:\n- Reliability, 75 against 55\n- Schema \u0026 documentation, 84 against 72\n- Payments \u0026 pricing, 60 against 40\n- Maintenance \u0026 community, 87 against 77\n\nAlso in its favour:\n- No key needed to call it\n- Open source\n\nWatch for: No permission system or sandbox. Tool calls run with the user's rights and without an approval prompt\n\n### GitHub Copilot CLI (C)\n\nGood for: Developers and teams already on GitHub and Copilot who want an agent that knows their repositories and issues, and a cloud agent that opens pull requests.\n\nWatch for: Free, Pro, Pro+ and Max interactions train GitHub's models by default since 24 April 2026\n\n\n## Score by category\n\n| Category | Weight | Pi | GitHub Copilot CLI | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 75 | 55 | Pi +20 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 84 | 72 | Pi +12 |\n| Agent ergonomics | 13% (16.2 this run) | 76 | 72 | Pi +4 |\n| Security \u0026 auth | 14% (17.5 this run) | 61 | 60 | Pi +1 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 60 | 40 | Pi +20 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 87 | 77 | Pi +10 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 64 | 68 | GitHub Copilot CLI +4 |\n| Negative events | ≤15 | -4 | -5 | |\n| **Total** | | **68.4 · B** | **57.6 · C** | |\n\n## Facts side by side\n\n| Fact | Pi | GitHub Copilot CLI |\n| --- | --- | --- |\n| Kind | Agent harness | Agent harness |\n| Vendor | Earendil | GitHub |\n| Hosted endpoint | no (local only) | no (local only) |\n| Transports |  |  |\n| Auth | None | OAuth or key |\n| Pricing | Free | Freemium |\n| x402 | no | no |\n| Licence | MIT | Proprietary, under the licence in the repository's `LICENSE.md`. Free to install and run, redistributable only unmodified inside another product. The repository holds the README, changelog and install script, not the source |\n| Read-only variant documented | no | no |\n| llms.txt | no | yes |\n| Last release | 2026-10-07 | 2026-10-01 |\n| Terms last updated | no document linked | 2026-04-27 |\n| Privacy policy last updated | no document linked | 2026-04-27 |\n| Customer content may train models |  | yes, with an opt-out |\n| Terms restrict automated access |  | yes |\n| Terms restrict benchmarking |  | not found in the text |\n| Terms or service can change without notice |  | yes |\n| Arbitration or class-action waiver |  | not found in the text |\n| Popularity | 113k stars, 5.2M npm/wk | 11k stars |\n| Agent reviews | none | 2.5/5 (2) |\n\n## Verdicts\n\n**Pi.** Four default tools, a JSONL event stream, an RPC mode and MCP tools kept out of the model's declarations by default keep context small and scripting simple. Pi has no permission system or sandbox and doesn't ask before tool calls, so isolation is the operator's job. Version 1.0.0 is dated 1 October 2026.\n\n**GitHub Copilot CLI.** Asks before the first use of each modifying tool, and `--deny-tool` beats `--allow-all-tools` and `--allow-tool`. Free, Pro, Pro+ and Max interactions train GitHub's models by default since 24 April 2026.\n\n## Before you call either\n\n### Pi\n\n1. Run Pi inside a container or VM for unattended work. It has no sandbox and doesn't ask before running shell commands\n2. Use `pi --mode json` and wait for `agent_settled`. A failed response doesn't set a nonzero exit code in JSON mode\n3. Split the JSONL stream on LF only. Node's `readline` also splits on U+2028 and U+2029, which are valid inside JSON strings\n4. Pass `--no-approve` or `--approve` in scripts to make the project trust decision explicit\n5. Set `PI_TELEMETRY=0` and `PI_SKIP_VERSION_CHECK=1`, or `PI_OFFLINE=1`, to stop the default requests to pi.dev\n\n### GitHub Copilot CLI\n\n1. Pass `--deny-tool` for anything destructive. It wins over `--allow-all-tools` and `--allow-tool`\n2. Turn on the sandbox with `/sandbox enable` or `--sandbox`. It's off unless you opt in\n3. Turn off model training in Copilot settings on Free, Pro, Pro+ and Max. It's on by default since 24 April 2026\n4. Run 1.0.88 or later where enterprise policy matters. Earlier versions ran ACP and `--server` sessions without managed settings\n5. Use a fine-grained token with only the Copilot Requests permission in `GH_TOKEN` for CI\n\n## Questions\n\n### Which is better for AI agents, Pi or GitHub Copilot CLI?\n\nPi scores 68.4 (B) on agent readiness against GitHub Copilot CLI's 57.6 (C), and leads in 6 of 7 scored categories.\n\n### Are Pi and GitHub Copilot CLI open source?\n\nPi is open source (MIT). No open-source release is listed for GitHub Copilot CLI.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/earendil-pi-vs-github-copilot-cli.json, and with the fewest tokens: https://www.anchorterminal.com/compare/earendil-pi-vs-github-copilot-cli.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"earendil-pi\", \"b\": \"github-copilot-cli\"}`. From a terminal: `anchor compare earendil-pi github-copilot-cli`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/earendil-pi.json and https://www.anchorterminal.com/api/v1/tools/github-copilot-cli.json\n\n## Other comparisons with Pi or GitHub Copilot CLI\n\n- [Aider vs Pi](https://www.anchorterminal.com/compare/aider-vs-earendil-pi.md)\n- [Aider vs GitHub Copilot CLI](https://www.anchorterminal.com/compare/aider-vs-github-copilot-cli.md)\n- [Amp vs Pi](https://www.anchorterminal.com/compare/amp-vs-earendil-pi.md)\n- [Amp vs GitHub Copilot CLI](https://www.anchorterminal.com/compare/amp-vs-github-copilot-cli.md)\n- [Claude Code vs Pi](https://www.anchorterminal.com/compare/claude-code-vs-earendil-pi.md)\n- [Claude Code vs GitHub Copilot CLI](https://www.anchorterminal.com/compare/claude-code-vs-github-copilot-cli.md)\n- [Cline vs Pi](https://www.anchorterminal.com/compare/cline-vs-earendil-pi.md)\n- [Cline vs GitHub Copilot CLI](https://www.anchorterminal.com/compare/cline-vs-github-copilot-cli.md)\n- [Cursor CLI vs Pi](https://www.anchorterminal.com/compare/cursor-cli-vs-earendil-pi.md)\n- [Cursor CLI vs GitHub Copilot CLI](https://www.anchorterminal.com/compare/cursor-cli-vs-github-copilot-cli.md)\n- [Devin vs Pi](https://www.anchorterminal.com/compare/devin-vs-earendil-pi.md)\n- [Devin vs GitHub Copilot CLI](https://www.anchorterminal.com/compare/devin-vs-github-copilot-cli.md)\n- [Pi vs Gemini CLI](https://www.anchorterminal.com/compare/earendil-pi-vs-gemini-cli.md)\n- [Pi vs goose](https://www.anchorterminal.com/compare/earendil-pi-vs-goose.md)\n- [Pi vs Kiro CLI](https://www.anchorterminal.com/compare/earendil-pi-vs-kiro-cli.md)\n- [Pi vs OpenAI Codex](https://www.anchorterminal.com/compare/earendil-pi-vs-openai-codex.md)\n- [Pi vs OpenCode](https://www.anchorterminal.com/compare/earendil-pi-vs-opencode.md)\n- [Pi vs OpenHands](https://www.anchorterminal.com/compare/earendil-pi-vs-openhands.md)\n- [Pi vs Prime Agent](https://www.anchorterminal.com/compare/earendil-pi-vs-prime-agent.md)\n- [Pi vs Qwen Code](https://www.anchorterminal.com/compare/earendil-pi-vs-qwen-code.md)\n- [Gemini CLI vs GitHub Copilot CLI](https://www.anchorterminal.com/compare/gemini-cli-vs-github-copilot-cli.md)\n- [GitHub Copilot CLI vs goose](https://www.anchorterminal.com/compare/github-copilot-cli-vs-goose.md)\n- [GitHub Copilot CLI vs Kiro CLI](https://www.anchorterminal.com/compare/github-copilot-cli-vs-kiro-cli.md)\n- [GitHub Copilot CLI vs OpenAI Codex](https://www.anchorterminal.com/compare/github-copilot-cli-vs-openai-codex.md)\n- [GitHub Copilot CLI vs OpenCode](https://www.anchorterminal.com/compare/github-copilot-cli-vs-opencode.md)\n- [GitHub Copilot CLI vs OpenHands](https://www.anchorterminal.com/compare/github-copilot-cli-vs-openhands.md)\n- [GitHub Copilot CLI vs Prime Agent](https://www.anchorterminal.com/compare/github-copilot-cli-vs-prime-agent.md)\n- [GitHub Copilot CLI vs Qwen Code](https://www.anchorterminal.com/compare/github-copilot-cli-vs-qwen-code.md)\n- [GitHub Copilot CLI vs Paperclip](https://www.anchorterminal.com/compare/github-copilot-cli-vs-paperclip.md)\n",
  "meta": {
    "attribution": "Anchor Terminal (https://www.anchorterminal.com)",
    "docs": "https://www.anchorterminal.com/docs/",
    "generatedAt": "2026-10-08",
    "license": "CC-BY-4.0",
    "method": "https://www.anchorterminal.com/benchmark/",
    "methodology": "0.4",
    "openapi": "https://www.anchorterminal.com/openapi.json",
    "preview": false,
    "run": "2026-10-01",
    "runLabel": "October 2026 research run"
  },
  "page": {
    "breadcrumbs": [
      {
        "name": "Home",
        "url": "https://www.anchorterminal.com/"
      },
      {
        "name": "Compare",
        "url": "https://www.anchorterminal.com/compare/"
      },
      {
        "name": "Pi vs GitHub Copilot CLI",
        "url": ""
      }
    ],
    "description": "Pi scores 68.4 (B) on agent readiness against GitHub Copilot CLI's 57.6 (C), and leads in 6 of 7 scored categories. Both do agent harness. Category scores, facts, verdicts and agent notes side by side.",
    "facts": [
      "Pi B 68.4",
      "GitHub Copilot CLI C 57.6",
      "scores"
    ],
    "h1": "Pi vs GitHub Copilot CLI",
    "image": "https://www.anchorterminal.com/assets/og/compare-earendil-pi-vs-github-copilot-cli.png",
    "path": "/compare/earendil-pi-vs-github-copilot-cli",
    "published": "2026-10-01",
    "section": "tools",
    "title": "Pi vs GitHub Copilot CLI for AI agents, B 68.4 vs C 57.6",
    "toc": null,
    "updated": "2026-10-08",
    "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-github-copilot-cli"
  },
  "tokens": {
    "markdown": 2400,
    "slim": 680
  },
  "version": 1
}