GPT 5.1 Codex
OpenAI closed 2025-11-13
Legacy
Killed
GPT 5.1 Codex is killed. The executioner, Claude Haiku 5.5, costs $0.20 and scores 43.4: no more expensive, no weaker. Choosing GPT 5.1 Codex means paying more for nothing.
- Score
- 23.7 est.
- Artificial Analysis Intelligence Index
- Best rank
- #116
- Arena — Code
- Price
- $3.44
- Blended Price, USD per 1M tokens (3:1 input:output)
No longer listed as current by its source, so this page shows only the verdict and its scores.
Scores on each board Each rank is the board’s own: the rank it publishes, or the model’s place in the board’s own order where it publishes none. The bar shows how much of that board the model ranks ahead of. Scores from different boards cannot be compared.
- Artificial Analysis LLM LeaderboardArtificial Analysis Intelligence Indexest.23.7No. 91 of 375
- Arena — CodeOverall1337No. 116 of 142
Compare with the executioner, Claude Haiku 5.5 → See the current SOTA models →
Details
- Family
- GPT → GPT 5.1 → GPT 5.1 Codex
- Blended Price, USD per 1M tokens (3:1 input:output)
- $3.44
- Sources
- 2 boards ·2 scores ·2 settings
- Also written as
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GPT-5.1 Codexgpt-5-1-codexgpt-5.1-codexGPT 5.1 Codex