GPT 5.3 Codex
OpenAI closed 2026-02-05
Killed
GPT 5.3 Codex is killed. The executioner, Claude Haiku 5.5, costs $0.20 and scores 43.4: no more expensive, no weaker. Choosing GPT 5.3 Codex means paying more for nothing.
- Score
- 32.5 est.
- Artificial Analysis Intelligence Index
- Best rank
- #87
- Arena — Code
- Price
- $4.81
- Blended Price, USD per 1M tokens (3:1 input:output)
Not among the SOTA models right now, so this page keeps to the verdict and the 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.32.5No. 48 of 375
- Arena — CodeOverall1409No. 87 of 142
Compare with the executioner, Claude Haiku 5.5 → See the current SOTA models →
Details
- Family
- GPT → GPT 5.3
- Blended Price, USD per 1M tokens (3:1 input:output)
- $4.81
- Sources
- 2 boards ·3 scores ·2 settings
- Also written as
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GPT-5.3 Codexgpt-5-3-codexgpt-5.3-codexGPT 5.3 Codex