LOADING DATASHEET
GROUNDED IN REAL HUMAN CONVERSATIONSYOUR BENCH
GPT 5.1 Codex Max
by OpenAI
CLOSEDHOSTEDAPILONG CONTEXTPAIDREASONING
RANKED #48 OF 228 ASSISTANTS · OVERALL #82 OF 6,618 · VIBE SCORE 6.4 · 269 VOICES
GPT-5.1-Codex-Max is OpenAI’s latest agentic coding model, designed for long-running, high-context software development tasks. It is based on an updated version of the 5.1 reasoning stack and trained on agentic...
HAPPY9.5
18 mentions
SAD5.5
11 mentions
VIBE TRAJECTORY
26 weeks · 93 voices
HONEYMOON FADING
Early praise is cooling off in recent weeks.
HOW TO USE IT
Closed model. OpenAI hosts it, so you use it through an app or an API.
PREFER OPEN SOURCE? THE CROWD HAS PICKS
GPT 5.1 Codex Max is closed, so you rent it. These open-weight models can genuinely stand in for it. Download once, own forever.
- OPEN WEIGHTS6.9
Kimi K3MoonshotTop tier open multimodal model for frontier reasoning and long horizon coding.🏆 NEAR-PEER QUALITY💻 STRONG AT CODE💸 COST EFFICIENT1.7k VOICESMATCH★★★ - OPEN WEIGHTS7.5
Qwen3.8 27BAlibabaRun frontier multimodal coding workflows fully offline on consumer GPUs.🔒 PRIVATE & OFFLINE💻 STRONG AT CODE🪶 RUNS ON LESS5.7k VOICESMATCH★★★ - OPEN WEIGHTS7.5Dots3 NoteXiaohongshuStrong multimodal MoE model built for complex reasoning and long horizon agents.💻 STRONG AT CODE🏆 NEAR-PEER QUALITY💸 COST EFFICIENT2.6k VOICESMATCH★★★
WHAT THE INTERNET SAYS
People are mostly frustrated with GPT 5.1 Codex Max right now.
253 POSTS · 16 COMMENTS · HACKER NEWS · GITHUB · REDDIT · BLOG · LEMMY · DEV FORUMS · X
PEOPLE LOVE
- No fan mail yet. The crowd is still warming up.
PEOPLE COMPLAIN ABOUT
- Outages, errors, or limits get in the way (3 mentions)
TOPIC BY TOPIC
- Working when you need itA SORE SPOT
0 thumbs up · 3 thumbs down
LOOKING FOR AN ALTERNATIVE?
Checked picks first: tags say why you would switch, stars say how fully each one stands in for GPT 5.1 Codex Max.
Gemini 3.7 Flash
Grok 4.6> SOURCES (12)
- REDDIT · 2025-12-04 · 912 UPVOTESGemini 3 "Deep Think" benchmarks released: Hits 45.1% on ARC-AGI-2 more than doubling GPT-5.1
Gemini 3 "Deep Think" benchmarks released: Hits 45.1% on ARC-AGI-2 more than doubling GPT-5.1
- HACKER NEWS · 2025-11-19 · 483 UPVOTESBuilding more with GPT-5.1-Codex-Max
Building more with GPT-5.1-Codex-Max
- REDDIT · 2025-12-08 · 479 UPVOTESOpenAI has by far THE WORST guardrails of every single model provider
OpenAI has by far THE WORST guardrails of every single model provider
- REDDIT · 2025-12-12 · 430 UPVOTESGPT 5.2 underperforms on RAG
GPT 5.2 underperforms on RAG
- REDDIT · 2025-12-05 · 372 UPVOTESLMArena Leaderboard, GPT 5.1 is falling more and more behind
LMArena Leaderboard, GPT 5.1 is falling more and more behind
- REDDIT · 2025-12-05 · 359 UPVOTESGemini 3 Pro Vision benchmarks: Finally compares against Claude Opus 4.5 and GPT-5.1
Gemini 3 Pro Vision benchmarks: Finally compares against Claude Opus 4.5 and GPT-5.1
- REDDIT · 2025-12-22 · 344 UPVOTESZhipu AI releases GLM-4.7: Beating GPT-5.2 and Claude 4.5 Sonnet in Coding & Reasoning Benchmarks
Zhipu AI releases GLM-4.7: Beating GPT-5.2 and Claude 4.5 Sonnet in Coding & Reasoning Benchmarks
- REDDIT · 2025-12-17 · 260 UPVOTESGPT-5.2-High falling to #15 on LMArena is crazy, behind GPT 5.1, Opus4.5 and even Gemini-3-Flash
GPT-5.2-High falling to #15 on LMArena is crazy, behind GPT 5.1, Opus4.5 and even Gemini-3-Flash
- REDDIT · 2025-12-04 · 254 UPVOTESGPT-5.1 Codex Max Extra High Fast
GPT-5.1 Codex Max Extra High Fast
- REDDIT · 2026-02-24 · 184 UPVOTESThere's something seriously wrong with GPT 5.2 in ChatGPT
There's something seriously wrong with GPT 5.2 in ChatGPT
- REDDIT · 2025-11-19 · 184 UPVOTESGPT-5.1-Codex-Max is coming
GPT-5.1-Codex-Max is coming
- REDDIT · 2025-12-14 · 149 UPVOTESSurprised at all the negative feedback about GPT-5.2
Surprised at all the negative feedback about GPT-5.2