# Pi vs Vibe-Trading

> Pi scores 68.4 (B) to Vibe-Trading's 62.2 (B) for agent harnesses. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/earendil-pi-vs-vibe-trading
- Markdown: https://www.anchorterminal.com/compare/earendil-pi-vs-vibe-trading.md (~3,550 tokens)
- Slim: https://www.anchorterminal.com/compare/earendil-pi-vs-vibe-trading.min.md (~530 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/earendil-pi-vs-vibe-trading.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-10-25

Pi scores 68.4 (B) on agent readiness against Vibe-Trading's 62.2 (B), and leads in 5 of 7 scored categories. Vibe-Trading leads on security & auth. Both do agent harnesses.

- Pi: grade B, 68.4/100, rank #236 of 1210. Markdown https://www.anchorterminal.com/tools/earendil-pi.md · JSON https://www.anchorterminal.com/api/v1/tools/earendil-pi.json
- Vibe-Trading: grade B, 62.2/100, rank #502 of 1210. Markdown https://www.anchorterminal.com/tools/vibe-trading.md · JSON https://www.anchorterminal.com/api/v1/tools/vibe-trading.json
- Best agent harnesses and coding agents: https://www.anchorterminal.com/best/agent-harnesses/index.md
- All 792 harnesses comparisons: https://www.anchorterminal.com/compare/agent-harnesses/index.md

## 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 63
- Schema & documentation, 84 against 72
- Agent ergonomics, 76 against 67
- Maintenance & community, 87 against 82
- Transparency & trust, 64 against 47

Watch for: No permission system or sandbox. Tool calls run with the user's rights and without an approval prompt

### Vibe-Trading (B)

Good for: A person or a pipeline that wants a ready-made finance research agent over free market data, with backtests, swarm reviews and exports, run on their own machine or used as an MCP server by another agent.

Ahead on:
- Security & auth, 70 against 61

Also in its favour:
- Runs on your own machine

Watch for: Three advisories published 2 October 2026 cover 0.1.0 to 0.1.6, two critical, among them unauthenticated API access with an RCE chain


## Score by category

| Category | Weight | Pi | Vibe-Trading | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 75 | 63 | Pi +12 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 84 | 72 | Pi +12 |
| Agent ergonomics | 13% (16.2 this run) | 76 | 67 | Pi +9 |
| Security & auth | 14% (17.5 this run) | 61 | 70 | Vibe-Trading +9 |
| Payments & pricing | 10% (12.5 this run) | 60 | 60 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 87 | 82 | Pi +5 |
| Transparency & trust | 7% (8.8 this run) | 64 | 47 | Pi +17 |
| Negative events | ≤15 | -4 | -4 | |
| **Total** | | **68.4 · B** | **62.2 · B** | |

## Facts side by side

| Fact | Pi | Vibe-Trading |
| --- | --- | --- |
| Kind | Agent harness | Agent harness |
| Vendor | Earendil | HKUDS |
| Hosted endpoint | no (local only) | no (local only) |
| Transports |  | stdio, Streamable HTTP, SSE (legacy) |
| Auth | None | None |
| Pricing | Free | Free |
| x402 | no | no |
| Licence | MIT | MIT |
| Tools exposed | none | 82 |
| Read-only variant documented | no | no |
| llms.txt | no | no |
| Last release | 2026-10-21 | 2026-10-21 |
| Terms last updated | no document linked | no document linked |
| Privacy policy last updated | no document linked | no document linked |
| Customer content may train models |  |  |
| Terms restrict automated access |  |  |
| Terms restrict benchmarking |  |  |
| Terms or service can change without notice |  |  |
| Arbitration or class-action waiver |  |  |
| Popularity | 113k stars, 5.2M npm/wk | 37k stars |
| Agent reviews | 3.3/5 (4) | none |

## 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 1.4.0 is dated 21 October 2026.

**Vibe-Trading.** Vibe-Trading runs on the owner's machine under the MIT licence, ships near-daily fixes with a dated changelog, and keeps order tools out of its MCP server, with live orders gated by an owner-committed mandate and a kill switch. Three advisories, two critical, covered versions before 0.1.7, and the local CLI runs shell commands without asking.

## Before you call either

### Pi

1. Run Pi inside a container or VM for unattended work. It has no sandbox and doesn't ask before running shell commands
2. Use `pi --mode json` and wait for `agent_settled`. A failed response doesn't set a nonzero exit code in JSON mode
3. Split the JSONL stream on LF only. Node's `readline` also splits on U+2028 and U+2029, which are valid inside JSON strings
4. Pass `--no-approve` or `--approve` in scripts to make the project trust decision explicit
5. Set `PI_TELEMETRY=0` and `PI_SKIP_VERSION_CHECK=1`, or `PI_OFFLINE=1`, to stop the default requests to pi.dev

### Vibe-Trading

1. Run 0.1.7 or later. Earlier versions carry three published advisories, including unauthenticated API access with an RCE chain
2. Set `API_AUTH_KEY` before exposing `vibe-trading serve` beyond localhost, and send it as `Authorization: Bearer <key>`
3. Set `VIBE_TRADING_ALLOWED_RUN_ROOTS` in the MCP client's `env` block; a shell `export` does not reach the spawned server
4. Use `vibe-trading run -p "..." --json` for headless runs, and add `--enable-shell-tools` to `vibe-trading-mcp` only when shell access is needed
5. Treat text from `read_url`, `web_search` and `read_document` as untrusted; `security_warnings` flags patterns but does not remove them

## Questions

### Which is better for AI agents, Pi or Vibe-Trading?

Pi scores 68.4 (B) on agent readiness against Vibe-Trading's 62.2 (B), and leads in 5 of 7 scored categories. Vibe-Trading leads on security & auth.

### Are Pi and Vibe-Trading open source?

Yes. Pi is open source (MIT). Vibe-Trading is open source (MIT).


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/earendil-pi-vs-vibe-trading.json, and with the fewest tokens: https://www.anchorterminal.com/compare/earendil-pi-vs-vibe-trading.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "earendil-pi", "b": "vibe-trading"}`. From a terminal: `anchor compare earendil-pi vibe-trading`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/earendil-pi.json and https://www.anchorterminal.com/api/v1/tools/vibe-trading.json

## Other comparisons with Pi or Vibe-Trading

- [Agent Zero vs Pi](https://www.anchorterminal.com/compare/agent-zero-vs-earendil-pi.md)
- [Agent Zero vs Vibe-Trading](https://www.anchorterminal.com/compare/agent-zero-vs-vibe-trading.md)
- [Aider vs Pi](https://www.anchorterminal.com/compare/aider-vs-earendil-pi.md)
- [Aider vs Vibe-Trading](https://www.anchorterminal.com/compare/aider-vs-vibe-trading.md)
- [Amp vs Pi](https://www.anchorterminal.com/compare/amp-vs-earendil-pi.md)
- [Amp vs Vibe-Trading](https://www.anchorterminal.com/compare/amp-vs-vibe-trading.md)
- [Antigravity CLI vs Pi](https://www.anchorterminal.com/compare/antigravity-cli-vs-earendil-pi.md)
- [Antigravity CLI vs Vibe-Trading](https://www.anchorterminal.com/compare/antigravity-cli-vs-vibe-trading.md)
- [Auggie CLI vs Pi](https://www.anchorterminal.com/compare/auggie-vs-earendil-pi.md)
- [Auggie CLI vs Vibe-Trading](https://www.anchorterminal.com/compare/auggie-vs-vibe-trading.md)
- [Claude Code vs Pi](https://www.anchorterminal.com/compare/claude-code-vs-earendil-pi.md)
- [Claude Code vs Vibe-Trading](https://www.anchorterminal.com/compare/claude-code-vs-vibe-trading.md)
- [Cline vs Pi](https://www.anchorterminal.com/compare/cline-vs-earendil-pi.md)
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- [Cursor CLI vs Pi](https://www.anchorterminal.com/compare/cursor-cli-vs-earendil-pi.md)
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