# GPT-5.1-Codex

10 Hacker News commenters recommended GPT-5.1-Codex and 3 criticized it, November 2025 to November 2026. It was recommended in 3 of 13 months.

**Verdict:** Recommended as a strong coding model that people rate above Gemini 3 Pro for usable results. Critics note it is slow, unresponsive, and sometimes misdiagnoses bugs.

## Why people recommend it

- Strong results versus rival models (4 comments): "both Sonnet and GPT-5.1-Codex are both pretty effective" ([source](https://news.ycombinator.com/item?id=46040368)) "GPT 5.1-codex is better than Gemini 3 Pro" ([source](https://news.ycombinator.com/item?id=45969128)) "5.1 codex has been the best by far." ([source](https://news.ycombinator.com/item?id=46127836))
- Effective for coding tasks (3 comments): "both Sonnet and GPT-5.1-Codex are both pretty effective" ([source](https://news.ycombinator.com/item?id=46040368)) "GPT-5.1-Codex had a working version in a couple hours" ([source](https://news.ycombinator.com/item?id=46734523)) "5.1 codex has been the best by far." ([source](https://news.ycombinator.com/item?id=46127836))

## What people warn about

- Slow and unresponsive (2 comments): "GPT 5.1/codex is excellent for brainstorming in the UX, but I found it too unresponsive and intransparent as a code assistant." ([source](https://news.ycombinator.com/item?id=46086049)) "the speed was a big downer for me" ([source](https://news.ycombinator.com/item?id=46043059))
- Fixes sometimes questionable or wrong (2 comments): "The compression ratio is not amazing, so not sure if it really worked, but at least it ran without errors." ([source](https://news.ycombinator.com/item?id=46132904)) "misdiagnosed the issue and attempted a weird fix despite my prompt" ([source](https://news.ycombinator.com/item?id=46317414))

## Alternatives hackers recommend

- [Cursor Composer](https://hackerapproved.com/p/composer-2-5.md): 214 recommend
- [Qwen3-Coder](https://hackerapproved.com/p/qwen3-coder-next.md): 165 recommend
- [GPT-5.3-Codex](https://hackerapproved.com/p/gpt-5-3-codex.md): 135 recommend
- [Meta Muse Glimmer 30B](https://hackerapproved.com/p/meta-muse-glimmer.md): 70 recommend
- [GPT-5.2-Codex](https://hackerapproved.com/p/gpt-5-2-codex.md): 54 recommend

## Where to get it

- [Visit the official site](https://openai.com/)

## Cite as

Hacker Approved, "GPT-5.1-Codex", https://hackerapproved.com/p/gpt-5-1-codex/ (counts from 1,795,640 Hacker News comments, November 2025 to November 2026).