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GPT-5.3 Codex (Xhigh)
OpenAI · Released 2026-02-05 · Independent benchmark scores from Artificial Analysis
Intelligence Index
32.5
Output speed
94.1
tokens/sec
Blended price
$4.81
per 1M tokens
Time to first token
34.45s
Model metadata
| Model ID | 59b5b14b-5365-4ee7-824a-18a8e6309644 |
|---|---|
| Slug | gpt-5-3-codex |
| Release date | 2026-02-05 |
| Provider | OpenAI |
| Provider slug | openai |
| Output speed | 94.1 tok/s |
| Time to first token | 34.45s |
| Time to first answer | 34.45s |
| Blended price ($/1M) | $4.81 |
| Input price ($/1M) | $1.75 |
| Output price ($/1M) | $14.00 |
All evaluation scores (18)
| aime | — |
|---|---|
| aime 25 | — |
| artificial analysis coding index | — |
| artificial analysis intelligence index | 32.50 |
| artificial analysis math index | — |
| gpqa | 91.5% |
| hle | 42.5% |
| ifbench | 75.4% |
| lcr | 83.3% |
| livecodebench | — |
| math 500 | — |
| mmlu pro | — |
| scicode | — |
| tau banking | — |
| tau2 | 86.0% |
| terminalbench hard | 53.0% |
| terminalbench v2 1 | — |
| terminalbench v4 0 | — |
Source: artificialanalysis.ai/models/gpt-5-3-codex
Benchmark data from Artificial Analysis.