- pi-web-access 0.38.0.
- Web searches with no API key (Parallel) no longer fail with "free-tier rate limit".
- On a ChatGPT subscription, OpenAI web search now uses the newer, much cheaper gpt-6-luna, so searches take far less of your usage.
- fetchcontent answer mode works with models whose provider signs in without an API key.
- Requests through a proxy keep their method, headers and body.
- Adds Ceramic, a paid search provider used only when you select it.
Feynman by Companion
The open source AI research agent.
Recently added on Oct 10, 2026. The description, category and pricing were filled in from public metadata and have not been checked by an editor yet.
Price
Free (OSS)
free and open source
Popularity
#7 in Research
Gid Score 33 / 100 · #177 of 378 overall
Trend
Gaining stars
about +10 GitHub stars a day
Development
Actively updated
latest 0.5.33, yesterday
Community
9,922 GitHub stars
18.9K package downloads a week
What Feynman does
Key facts
| Maker | Companion |
|---|---|
| First released | March 2026 |
| License | MIT |
| Main language | TypeScript |
Pricing
Open source under the MIT licence; check the website for any paid hosted plans.
, checked Oct 10, 2026. Prices change often; confirm before you buy.
Quick answers
- Free to start?Yes
- Open source?Yes (MIT)
- Closest alternativeConsensus · all alternatives
Get started with Feynman
| npm | npm install -g @companion-ai/feynman |
|---|
These commands use the packages tracked on this page. The vendor may recommend a different installer.
Feynman alternatives
| # | Agent | Gid Score | Downloads 7d | 7d | 30d | VS Code installs | Stars | Latest release | Price | ||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 92 |
ConsensusConsensus |
43 | — | — | — | — | — | — | Free + $20/mo | ||
| 101 |
|
43 | — | — | — | — | 42.4K+9/day | 3.0.09mo ago | Free (OSS) | ||
| 110 |
AutoresearchAndrej |
41 | — | — | — | — | 97.6K+69/day | — | — | ||
| 144 |
|
36 | — | — | — | — | 5,450+1/day | — | — | ||
| 147 |
ElicitElicit |
36 | — | — | — | — | — | — | Free + $49/mo | ||
| 148 |
SciSpace AgentPubGenius Inc. |
36 | — | — | — | — | — | — | Free + $20/mo | ||
| No agents match that filter. | |||||||||||
Ratings from people who use Feynman
No ratings yet. Used Feynman? Rate it and say what it is good and bad at.
Feynman news
-
74 agents added to AgentGid
Symphony, OpenShell, Codex Security, NemoClaw, Agent Browser, Opensre, Caveman, Brag, Open Code Review, Understand-Anything, Codegraph, BrowserSkill and 62 more
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Feynman 0.5.33 released
pi-web-access 0.38.0.; Web searches with no API key (Parallel) no longer fail with "free-tier rate limit".; On a ChatGPT subscription, OpenAI web search now uses the newer, much cheaper gpt-6-luna, so searches take far less of your usage. (+2 more releases…
-
Feynman 0.5.30 released
Pi 1.1.0. Claude browser login no longer fails with "localhost refused to connect" when port 53692 is reserved or in use (common with Hyper-V/WSL on Windows); it falls back to a free port.…
-
Feynman downloads down 33% in a week
20.7K npm and PyPI downloads in the 7 days to Oct 6, against 30.9K the week before.
-
Feynman downloads down 31% in a week
30.9K npm and PyPI downloads in the 7 days to Sep 29, against 44.7K the week before.
What changed: recent Feynman releases
78 stable releases in the last 90 days · Full changelog
- A rejected sign-in now says what to do. When feynman model login or feynman setup ended with invalidgrant, usually after Sign in with ChatGPT, Feynman printed only the provider's error. It now…
- Feynman starts again if you once installed the old session-search package. Its entry stayed in ~/.feynman/agent/settings.json after the preset was removed. On Node 24 that made every launch fail…
- Pi 1.1.0. Claude browser login no longer fails with "localhost refused to connect" when port 53692 is reserved or in use (common with Hyper-V/WSL on Windows); it falls back to a free port.…
- PubMed titles and abstracts keep their italic terms. Text inside inline tags such as <i>BRCA1</i> was dropped, so a title read "patient with germline mutation" instead of "germline BRCA1…
- PubMed authors keep all their affiliations. An author listed with two or more affiliations came back with none. Thanks to @KennyMcSimpson (#327).
- Security: GHSA-6qxp-vccf-f47h (MCP SDK OAuth client). Feynman's own copies of @modelcontextprotocol/sdk move to 1.32.1. pi-web-access still pins 1.27.1 for its separate npx pi-web-access MCP…
- Pi 1.0.4, pi-subagents 0.76.1, pi-web-access 0.37.0.
- Pi: syntax highlighting keeps its colors across multiline strings and comments, MCP sign-in works on servers using OpenID Connect registration, and stalled Bedrock streams are retried.
- pi-subagents: when a subagent's result wakes the main session, that turn keeps its normal system prompt (subagent list, MCP servers, other extensions) and the provider's prompt cache. A per-tool…
- pi-web-access: a websearch or fetchcontent call where nothing succeeded is now reported as a tool error, so the model knows to try something else; Perplexity results include page snippets and cost…
Feynman popularity and usage data
Feynman was downloaded 18.9K times from npm in the week ending Oct 8, 2026, down 3.1% on the week before. Its download count moved to a different level overnight on Aug 16, 2026. A jump like that comes from automated installs switching on or off or from a change in how the registry counts, so growth rates across that date are not shown. The GitHub repository has 9,922 stars, 636 of them added in the last 30 days. The latest stable release is 0.5.33, published Oct 9, 2026; there were 36 stable releases in the past 30 days.
Download the raw daily series: feynman.csv
Gid Score breakdown
Adoption28
Community42
Attention—
Momentum53
Each component is scored 0 to 100 from public signals; a dash means no data for it. Methodology.
Feynman FAQ
How much does Feynman cost?
Open source under the MIT licence; check the website for any paid hosted plans.
Is Feynman open source?
Yes. Feynman is open source, released under the MIT license.
How popular is Feynman?
Feynman was downloaded 18.9K times from npm in the week ending Oct 8, 2026, down 3.1% on the week before. Its download count moved to a different level overnight on Aug 16, 2026. A jump like that comes from automated installs switching on or off or from a change in how the registry counts, so growth rates across that date are not shown. The GitHub repository has 9,922 stars, 636 of them added in the last 30 days.
What is the latest version of Feynman?
The latest stable release we track is 0.5.33, published on Oct 9, 2026.
What are the alternatives to Feynman?
The closest alternatives in the same category by Gid Score are Consensus, BettaFish, Autoresearch, PRAXIST.
For the makers of Feynman badges, corrections
Add a live badge to your README or site:
[](https://agentgid.com/agents/feynman/)[](https://agentgid.com/agents/feynman/)[](https://agentgid.com/agents/feynman/)Something wrong or outdated on this page? Send a correction with a link to the official source. More for makers.
Where these numbers come from
npm: @companion-ai/feynman. GitHub: companion-inc/feynman. Site rank: feynman.is on the Tranco list. See data sources for how each one is collected.
Product facts and pricing were checked against: feynman.is, github.com, npmjs.com.