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openai/codex

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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

Mentions per year 220 mentions · busiest year 2026 (153)
20082026
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  1. ▲ 3
    Codex app for macOS repeatedly triggers syspolicyd/trustd CPU and memory runaway
    story by enraged_camel · 2026-07-19 · 2 comments
  2. ▲ 371
    OpenAI reduces Codex Model Context Size from 372k to 272k
    story by AmazingTurtle · 2026-07-19 · 166 comments
  3. …[2]: https://github.com/anthropics/claude-code/issues/73125#event... [3]: https://github.com/openai/codex/issues/28969
    comment by cube00 · 2026-07-17 · in Claude Code: Anatomy of a Misfeature
  4. ▲ 3
    High GPU usage while Codex app is "thinking" due to tiny useless animation
    story by jeromechoo · 2026-07-15 · 1 comment
  5. Given that codex itself now ships a proxy that wraps the subscription, it seems unlikely https://github.com/openai/codex/blob/main/codex-rs/responses...
    comment by CjHuber · 2026-07-14 · in Codex starts encrypting sub-agent prompts
  6. ▲ 425
    Codex starts encrypting sub-agent prompts
    story by embedding-shape · 2026-07-14 · 249 comments
  7. ▲ 3
    Codex GPT 5.6 Sol Reduced to 258K Context Window
    story by ex1box · 2026-07-13 · 0 comments
  8. ▲ 6
    Tell HN: The Codex App is replaced by ChatGPT
    story by vintagedave · 2026-07-13 · 4 comments
  9. ▲ 3
    Codex now encrypts messages passed to subagents
    story by gck1 · 2026-07-11 · 0 comments
  10. …it with an individual Pro account (5x or 20x) for a month. Download the Codex CLI client from https://github.com/openai/codex and auth it in the browser via the URL it provides. Set the model to 5.6-Sol and effort to max.
    comment by gruntled-worker · 2026-07-09 · in GPT-5.6
  11. …are getting because the overall result is dramatically worse than stated by Open AI advertising: https://github.com/openai/codex/issues/30364
    comment by jiggawatts · 2026-07-09 · in GPT-5.6
  12. Understood thanks; will 5.6 fix this issue that makes Pro unusable? https://github.com/openai/codex/issues/30364 "GPT-5.5 Codex reasoning-token clustering at 516/1034/1552 may be leading to degraded performance on complex tasks"
    comment by dude250711 · 2026-07-09 · in GPT-5.6
  13. Will be there soon according to the last commits in the codex repo: https://github.com/openai/codex/pull/31684/changes Also, confirmed it works for me by using --model gpt-5.6-sol
    comment by denysvitali · 2026-07-09 · in GPT-5.6
  14. sources for easy confirmation: https://github.com/openai/codex/blob/98d28aab54ed86714901b66... https://github.com/openai/codex/blob/98d28aab54ed86714901b66... https://github.com/openai/codex/blob/98d28aab54ed86714901b66...
    comment by Szpadel · 2026-07-06 · in GPT-5.6 Sol Ultra will be in Codex
  15. …laziness. Switched back to 5.4 and it's much better. Maybe they're getting ready to launch 5.6? https://github.com/openai/codex/issues/30364
    comment by oxmom · 2026-07-06 · in GPT-5.6 Sol Ultra will be in Codex
  16. …the model gets confused about what's an intermediate update vs what's the final answer? [1] [1] https://github.com/openai/codex/issues/30364#issuecomment-48...
    comment by nsingh2 · 2026-07-05 · in GPT-5.5 Codex reasoning-token clustering may be leading to degraded performance
  17. …getting confused between what's supposed to be an intermediate update vs the final result. [1] https://github.com/openai/codex/issues/30364#issuecomment-48...
    comment by nsingh2 · 2026-07-05 · in GPT-5.5 Codex reasoning-token clustering may be leading to degraded performance
  18. …getting confused between what's supposed to be an intermediate update vs the final result. [1] https://github.com/openai/codex/issues/30364#issuecomment-48...
    comment by nsingh2 · 2026-07-05 · in GPT-5.5 Codex reasoning-token clustering may be leading to degraded performance
  19. …GitHub workflow/UX and not actually the intended reason) without a acknowledgement or a response. https://github.com/openai/codex/issues/29353 What even is the point of a public-facing bug tracker “for devs, by devs” when this is how…
    comment by ComputerGuru · 2026-07-05 · in GPT-5.5 Codex reasoning-token clustering may be leading to degraded performance
  20. ▲ 3
    Codex ticket: first-class Jujutsu support
    story by xlii · 2026-07-05 · 1 comment
  21. …compiled, there's nothing stopping you from making some other harness act like such a fork. [1] https://github.com/openai/codex
    comment by miki123211 · 2026-07-05 · in GPT-5.5 Codex reasoning-token clustering may be leading to degraded performance
  22. ▲ 372
    GPT-5.5 Codex reasoning-token clustering may be leading to degraded performance
    story by maille · 2026-07-04 · 152 comments
  23. Codex apparently added this too, I only noticed a few days ago: https://github.com/openai/codex/issues/28969 I'm usually at my desk, and get a notification when it stops to ask a question, so I've never accidentally had it timeout yet.…
    comment by nsingh2 · 2026-07-02 · in Claude's AskUserQuestion: "No response after 60s – continued without an answer"
  24. …one that causes frequent reauthenticate request from the client. for example codex has this bug ( https://github.com/openai/codex/issues/20503 ). many servers solve this with some workarounds or increasing the token life. In v2 of mcp-use…
    comment by tonxxd · 2026-07-02 · in Launch HN: Manufact (YC S25) – MCP Cloud
  25. I thought codex was open source https://github.com/openai/codex
    comment by subarctic · 2026-07-01 · in ZCode – Harness for GLM-5.2
  26. codex is open source https://github.com/openai/codex/ it's definitely geared towards openai but it is completely open source
    comment by FergusArgyll · 2026-07-01 · in ZCode – Harness for GLM-5.2
  27. Codex is open source: https://github.com/openai/codex
    comment by InvertedRhodium · 2026-07-01 · in ZCode – Harness for GLM-5.2
  28. ▲ 13
    Codex reasoning-token clustering at 516 may be leading to degraded performance
    story by 0x_rs · 2026-07-01 · 2 comments
  29. Most likely reasoning being truncated. Refer to this: https://github.com/openai/codex/issues/30364 https://www.reddit.com/r/codex/comments/1ugyvez/half_of_your...
    comment by 0x_rs · 2026-07-01 · in Ask HN: Is Codex with GPT 5.5 Extra High being dumbed down?
  30. ▲ 4
    macOS: Code_sign_clone grows unbounded (62 GB+) across Codex auto-updates
    story by ValentineC · 2026-06-30 · 0 comments
  31. ▲ 227
    A way to exclude sensitive files issue still open for OpenAI Codex
    story by pikseladam · 2026-06-28 · 143 comments
  32. ▲ 2
    GPT-5.6 family added to codex
    story by FergusArgyll · 2026-06-28 · 2 comments
  33. …in the model card. It's for sure a codex harness feature. EDIT: yeah, it's the same thing. https://github.com/openai/codex/blob/main/codex-rs/core/test...
    comment by gck1 · 2026-06-26 · in Previewing GPT‑5.6 Sol: a next-generation model
  34. Yeah... one of the relevant issues: https://github.com/openai/codex/issues/11940#issuecomment-45... You would think they would support their own GPT-OSS model, but, not really anymore. I wish they would release a GPT-OSS 2, but this…
    comment by coder543 · 2026-06-23 · in Elevated error rate across multiple models
  35. ▲ 1
    GPT-5.6 leaks in Codex PR
    story by denysvitali · 2026-06-23 · 0 comments
  36. Looks like this was fixed[0], so it should land in the next release. [0] https://github.com/openai/codex/commit/e98d43ac372ddf7f513c0...
    comment by ewsbr · 2026-06-22 · in Codex logging bug may write TBs to local SSDs
  37. …would stop getting locked up from a lack of disk space from codex logging. You can find it here: https://github.com/openai/codex/issues/28224#issuecomment-47... I have been making noise about this bug for a week, so I'm glad to see this is…
    comment by Zenul_Abidin · 2026-06-22 · in Codex logging bug may write TBs to local SSDs
  38. …should, but just a reminder, unlike Claude Code, Codex is officially available to customize here: https://github.com/openai/codex It's fairly easy to patch.
    comment by christophilus · 2026-06-22 · in Codex logging bug may write TBs to local SSDs
  39. …they landed a major regression for an entire team of folks I work with. No response, no workaround. https://github.com/openai/codex/issues/23762
    comment by purpleidea · 2026-06-22 · in Codex logging bug may write TBs to local SSDs
  40. ▲ 510
    Codex logging bug may write TBs to local SSDs
    story by vantareed · 2026-06-22 · 271 comments
  41. ▲ 7
    Codex (GPT-5.5, Plus plan) – rate-limit cost per token jumped 10x+ since June 16
    story by e2e4 · 2026-06-20 · 5 comments
  42. …is re-invented twice monthly. https://www.facebook.com/groups/vibecodinglife/posts/1946207... https://github.com/openai/codex/discussions/10628 https://build5nines.com/stop-burning-premium-requests-how-to... > Not because it is…
    comment by mpalmer · 2026-06-12 · in /architect: Reduce Fable tokens by 80%, Fable orchestrates/reviews, Codex builds
  43. You can absolutely do that by using subprocess.run, or use the codex sdk https://github.com/openai/codex/tree/main/sdk/python
    comment by sgc · 2026-06-12 · in Apache Burr: Build reliable AI agents and applications
  44. …to read ALL FILES on my PC without explicit permission unless you spawn them within a container: https://github.com/openai/codex/issues/2847 It seems like OpenAI stealing sensitive data from their customers is not a big problem for them as…
    comment by thomas34298 · 2026-06-06 · in Lockdown Mode
  45. …and other agents? I still routinely see these agents throwing away work because the editing failed? https://github.com/openai/codex/issues/11601 https://github.com/anthropics/claude-code/issues/25775 It seems they didn't look into it…
    comment by faangguyindia · 2026-05-31 · in Cache hit rates of Inference are more meaningful than the headline costs
  46. …server rendering of the prompts. AFAIK, Codex is the only major harness to not support this. [0] https://github.com/openai/codex/issues/5059#issuecomment-453...
    comment by CharlieDigital · 2026-05-30 · in MCP is dead?
  47. ▲ 3
    Codex is flagged as malware on macOS
    story by vldszn · 2026-05-23 · 3 comments
  48. It seems HN removed the deep-link, so here it is: https://github.com/openai/codex/issues/23794#issuecomment-45...
    comment by gobdovan · 2026-05-22 · in OpenAI intentionally removed Codex's visible context usage indicator
  49. ▲ 2
    OpenAI intentionally removed Codex's visible context usage indicator
    story by gobdovan · 2026-05-22 · 1 comment
  50. Codex is open source if you’re interested https://github.com/openai/codex
    comment by ralfhn · 2026-05-15 · in How Claude Code works in large codebases