openai/codex
View on GitHub ↗ ★ 132,828 Rust
Lightweight coding agent that runs in your terminal
220 mentions on Hacker News by 164 people: 64 stories, 156 comments · first 2025-04-16 · latest 2026-10-27
20082026
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Looks like codex has it too since last week, https://github.com/openai/codex/releases/tag/rust-v0.130.0
comment by rovr138 · 2026-05-14 · in Codex is now in the ChatGPT mobile app -
Related https://github.com/openai/codex/issues/21199
comment by roflcopter69 · 2026-05-12 · in Codex downloaded by Xcode 26.4.1 reported as Malware -
I think codex has done something along the line: https://github.com/openai/codex/pull/6041 But it is trying to use git as a backend to save file states, and at the same time NOT showing it in the user's git history.
comment by cosimo-dw · 2026-05-08 · in Show HN: Git for AI Agents -
…and imaginative inside their own thinking. You are an epistemically curious collaborator. … ( https://github.com/openai/codex/blob/main/codex-rs/models-ma... ) I am still baffled why prompts are written in this style, telling an imaginary…
comment by jameshart · 2026-04-30 · in Where the goblins came from -
…relevant to the user's query. [1] https://x.com/arb8020/status/2048958391637401718 [2] https://github.com/openai/codex/blob/main/codex-rs/models-ma...
comment by ollin · 2026-04-30 · in Where the goblins came from -
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Business and Enterprise Codex plans now default to Fast Mode (2.5x usage)story by ladon86 · 2026-04-29 · 0 comments
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A GPT-5.4 bug led to OpenAI banning goblins and raccoonsstory by prabal97 · 2026-04-29 · 1 comment
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https://github.com/openai/codex
comment by milkshakes · 2026-04-28 · in OpenAI models coming to Amazon Bedrock: Interview with OpenAI and AWS CEOs -
…version of Codex still read sensitive data on your file system without even asking? Just curious. https://github.com/openai/codex/issues/2847
comment by thomas34298 · 2026-04-16 · in Codex for almost everything -
https://github.com/openai/codex/discussions/8338
comment by FergusArgyll · 2026-04-15 · in Ask HN: Who is using OpenClaw? -
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OpenAI Codex Compaction Failingstory by obahareth · 2026-04-14 · 1 comment
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OpenAI Codex Telepathy feature flag: sidecar for passive screen-context memoriesstory by matthieu_bl · 2026-04-14 · 0 comments
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…1) Pin to an earlier version of codex (sorry) - 0.55 is the best experience IME, but YMMV (see https://github.com/openai/codex/issues/11940 , https://github.com/openai/codex/issues/8272 ). 2) Use the older completions endpoint (llama.cpp's…
comment by vsrinivas · 2026-04-13 · in I ran Gemma 4 as a local model in Codex CLI -
The also removed Chat mode (from their Codex VSCode extension): https://github.com/openai/codex/issues/11007
comment by hbcondo714 · 2026-04-12 · in Tell HN: OpenAI silently removed Study Mode from ChatGPT -
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Codex GUI's spinner uses 70% of GPUstory by Einenlum · 2026-04-11 · 1 comment
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…love to understand the reasoning for the poor support for this relatively simple protocol. [0] https://github.com/openai/codex/issues/5059 [1] https://modelcontextprotocol.io/specification/2025-06-18/ser...
comment by CharlieDigital · 2026-04-10 · in I still prefer MCP over skills -
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Burning Tokens Faststory by 0x1997 · 2026-04-01 · 0 comments
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Codex is open source: https://github.com/openai/codex
comment by MallocVoidstar · 2026-03-31 · in Claude Code's source code has been leaked via a map file in their NPM registry -
You may have mistaken it with Codex https://github.com/openai/codex
comment by agluszak · 2026-03-31 · in Claude Code's source code has been leaked via a map file in their NPM registry -
This one: https://github.com/openai/codex/tree/main/codex-rs/app-serve...
comment by SeriousM · 2026-03-27 · in Agent-to-agent pair programming -
…dynamically compose the set of skills without needing to do any syncs, git sub-modules, etc. [0] https://github.com/openai/codex/issues/5059
comment by CharlieDigital · 2026-03-26 -
Sadly, this issue is systemic: https://github.com/openai/codex/issues/2847
comment by nulld3v · 2026-03-26 · in Updates to GitHub Copilot interaction data usage policy -
Thanks for recommending these tools; very helpful! https://codewiki.google/github.com/openai/codex
comment by dr_kiszonka · 2026-03-16 · in LLM Architecture Gallery -
…you think of sandbox-exec being marked as deprecated? https://news.ycombinator.com/item?id=31973232 https://github.com/openai/codex/issues/215
comment by brutuscat · 2026-03-09 · in Agent Safehouse – macOS-native sandboxing for local agents -
It's the other way around - Claude Code is the proprietary one. Codex CLI is open source: https://github.com/openai/codex You can definitely access the latest models via the API. That's how Codex CLI works.
comment by mike_hearn · 2026-03-08 · in SWE-CI: Evaluating Agent Capabilities in Maintaining Codebases via CI -
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Updating Codex Contribution Guidelinesstory by kator · 2026-03-03 · 1 comment
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…your coding agent right away, you can just reroute Codex to a different model for the time being. https://github.com/openai/codex/issues/26#issuecomment-28116...
comment by 2001zhaozhao · 2026-02-28 · in How do I cancel my ChatGPT subscription? -
…was redeemed as high risk. It seems like they currently have a lot of false positives: https://github.com/openai/codex/issues?q=High%20risk
comment by super256 · 2026-02-19 · in Anthropic officially bans using subscription auth for third party use -
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Tell HN: OpenAI has been silently routing GPT-5.3-Codex requests to GPT-5.2story by prodigycorp · 2026-02-15 · 0 comments
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Ask HN: GPT-5.3-Codex being silently routed to GPT-5.2?story by tardis_thad · 2026-02-12 · 3 comments
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GPT-5.3-Codex being silently routed to GPT-5.2story by tardis_thad · 2026-02-12 · 1 comment
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Codex 0.100.0story by tosh · 2026-02-12 · 0 comments
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…subagents, but it looks like the `/experimental` feature in codex-cli has the SubAgent setting ( https://github.com/openai/codex/issues/2604#issuecomment-387... )
comment by properbrew · 2026-02-12 · in GPT‑5.3‑Codex‑Spark -
…or required tool calls work. Codex does in fact use a schema for constrained sampling, it's here: https://github.com/openai/codex/blob/main/codex-rs/core/src/... It still has to work to get an exact match, or at least I didn't read the…
comment by matheist · 2026-02-12 · in Improving 15 LLMs at Coding in One Afternoon. Only the Harness Changed -
Filed an issue for codex https://github.com/openai/codex/issues/11601
comment by 0xdeafbeef · 2026-02-12 · in Improving 15 LLMs at Coding in One Afternoon. Only the Harness Changed -
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GPT-5.3-Codex being routed to GPT-5.2story by cactusplant7374 · 2026-02-11 · 30 comments
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…Codex changelog: https://developers.openai.com/codex/changelog/ Codex CLI commit history: https://github.com/openai/codex/commits/main/
comment by tedsanders · 2026-02-05 · in Claude Opus 4.6 -
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Personality should be an Option that you can set to Nonestory by tosh · 2026-02-05 · 0 comments
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…It never works. Is it in the main Codex build? There doesn’t seem to be an experiment for it. https://github.com/openai/codex/issues/2604
comment by turblety · 2026-02-02 · in The Codex App -
…Here's the macOS kernel-enforced sandbox profile that gets applied to processes spawned by the LLM: https://github.com/openai/codex/blob/main/codex-rs/core/src/... I think skepticism is healthy here, but there's no need to just guess.
comment by valleyer · 2026-02-01 · in What I learned building an opinionated and minimal coding agent -
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OpenAI Codex 0.93 adds SQLite backed log databasestory by tosh · 2026-01-31 · 0 comments
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…of OpenAI trying and failing to fix it for two weeks is not indicative of a functional company: https://github.com/openai/codex/issues/9253 OTOH, if Anthropic did that to Claude Code, there wasn’t a moderately straightforward workaround,…
comment by amluto · 2026-01-31 · in The $100B megadeal between OpenAI and Nvidia is on ice -
…> The Rust implementation is now the maintained Codex CLI and serves as the default experience [0] https://github.com/openai/codex/tree/main/codex-rs#whats-new...
comment by vorticalbox · 2026-01-24 · in Unrolling the Codex agent loop -
Wow, this part where they describe skills sounds quite odd https://github.com/openai/codex/blob/99f47d6e9a3546c14c43af9... Why wouldnt they just expose the files directly? Having the model ask for them as regular files sounds a bit odd
comment by gzalo · 2026-01-24 · in Unrolling the Codex agent loop -
Hmm, this seems promising? https://github.com/openai/codex/pull/9796
comment by copperx · 2026-01-24 · in Unrolling the Codex agent loop -
…their CLI a while ago and have been following their releases and PRs to broaden my knowledge. [0] https://github.com/openai/codex/tree/main/codex-rs
comment by vinhnx · 2026-01-24 · in Unrolling the Codex agent loop -
…1 are ignored and removed, since the model does not reuse reasoning items from previous turns. [0] https://github.com/openai/codex/pull/5857 [1] https://github.com/openai/codex/pull/5986 [2] https://cookbook.openai.com/examples/responses_ap…
comment by jumploops · 2026-01-24 · in Unrolling the Codex agent loop -
…communication is exceptional, too. Eric Traut (of Pyright fame) is all over the issues and PRs. https://github.com/openai/codex
comment by postalcoder · 2026-01-23 · in Unrolling the Codex agent loop -
…a couple of issues [0][1] opened about on GitHub, but it doesn't seem a priority for the team. [0] https://github.com/openai/codex/issues/2788 [1] https://github.com/openai/codex/issues/3585
comment by coffeeaddict1 · 2026-01-23 · in Unrolling the Codex agent loop -
…scrapes terminal output for an approval request. Codex has had a feature request open for a while: https://github.com/openai/codex/issues/3052
comment by jackcarter · 2026-01-20 · in Running Claude Code dangerously (safely)