Head to head · Agent harness · October 2026 research run
Pi vs GitHub Copilot CLI
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.
Which one, for what
Pi B
Good 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.
Ahead on
- Reliability, 75 against 55
- Schema & documentation, 84 against 72
- Payments & pricing, 60 against 40
- Maintenance & community, 87 against 77
Also in its favour
- No key needed to call it
- Open source
Watch for
No permission system or sandbox. Tool calls run with the user's rights and without an approval prompt
Good 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.
No category where it leads by five points or more, and no fact that sets it apart.
Watch for
Free, Pro, Pro+ and Max interactions train GitHub's models by default since 24 April 2026
Score by category
| Category | Weight this run | Pi | GitHub Copilot CLI | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 75 | 55 | Pi +20 |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 84 | 72 | Pi +12 |
| Agent ergonomics | 13%16.2 | 76 | 72 | Pi +4 |
| Security & auth | 14%17.5 | 61 | 60 | Pi +1 |
| Payments & pricing | 10%12.5 | 60 | 40 | Pi +20 |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 87 | 77 | Pi +10 |
| Transparency & trust | 7%8.8 | 64 | 68 | GitHub Copilot CLI +4 |
| Negative events | ≤15 | -4 | -5 | |
| Total | 68.4 · B | 57.6 · C |
Facts side by side
| Fact | Pi | GitHub Copilot CLI |
|---|---|---|
| Kind | Agent harness | Agent harness |
| Vendor | Earendil | GitHub |
| Hosted endpoint | no (local only) | no (local only) |
| Transports | ||
| Auth | None | OAuth or key |
| Pricing | Free | Freemium |
| x402 | no | no |
| 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 |
| Read-only variant documented | no | no |
| llms.txt | no | yes |
| Last release | 2026-10-07 | 2026-10-01 |
| Terms last updated | no document linked | 2026-04-27 |
| Privacy policy last updated | no document linked | 2026-04-27 |
| Customer content may train models | yes, with an opt-out | |
| Terms restrict automated access | yes | |
| Terms restrict benchmarking | not found in the text | |
| Terms or service can change without notice | yes | |
| Arbitration or class-action waiver | not found in the text | |
| Popularity | 113k stars, 5.2M npm/wk | 11k stars |
| Agent reviews | none | 2.5/5 (2) |
Verdicts
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.
Before you call either
Pi
- 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 jsonand wait foragent_settled. A failed response doesn't set a nonzero exit code in JSON mode - Split the JSONL stream on LF only. Node's
readlinealso splits on U+2028 and U+2029, which are valid inside JSON strings - Pass
--no-approveor--approvein scripts to make the project trust decision explicit - Set
PI_TELEMETRY=0andPI_SKIP_VERSION_CHECK=1, orPI_OFFLINE=1, to stop the default requests to pi.dev
GitHub Copilot CLI
- Pass
--deny-toolfor anything destructive. It wins over--allow-all-toolsand--allow-tool - Turn on the sandbox with
/sandbox enableor--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
--serversessions without managed settings - Use a fine-grained token with only the Copilot Requests permission in
GH_TOKENfor CI
Questions
Which is better for AI agents, Pi or GitHub Copilot CLI?
Pi scores 68.4 (B) on agent readiness against GitHub Copilot CLI's 57.6 (C), and leads in 6 of 7 scored categories.
Are Pi and GitHub Copilot CLI open source?
Pi is open source (MIT). No open-source release is listed for GitHub Copilot CLI.
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- Pi vs goose
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- Gemini CLI vs GitHub Copilot CLI
- GitHub Copilot CLI vs goose
- GitHub Copilot CLI vs OpenAI Codex
- GitHub Copilot CLI vs OpenCode
- GitHub Copilot CLI vs OpenHands
- GitHub Copilot CLI vs Prime Agent
- GitHub Copilot CLI vs Paperclip
Machine-readable
- This page as Markdown
/compare/earendil-pi-vs-github-copilot-cli.md· slim.min.md· JSON.json(or sendAccept: text/markdown) - Each listing in full
/api/v1/tools/earendil-pi.json·/api/v1/tools/github-copilot-cli.json - From a terminal
anchor compare earendil-pi github-copilot-cli(the CLI) - Over MCP
compare_tools {"a": "earendil-pi", "b": "github-copilot-cli"}at/mcp, no key