OpenAI: GPT-5.3-Codex
openai/gpt-5.3-codex
Context: 400,000In: $1.75/1MOut: $14.00/1MUpdated 2026-08-05
GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance of GPT-5.2-Codex with the broader reasoning and professional knowledge capabilities of GPT-5.2. It achieves state-of-the-art results...
Intelligence
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Coding
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Agentic
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Metric profile
Trend over time
Intelligence
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Coding
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Agentic
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Only 1 snapshot so far (data refreshes daily) — the trend line appears after the 2nd snapshot.
Classic evals (curated from model cards)
OpenAI GPT — manually maintained, may lag releases
MMLU-Pro
79.6%
GPQA Diamond
81.5%
HumanEval
96.8%
MATH-500
93%
Design Arena (ELO by category)
| Category | ELO | Win rate | Rank |
|---|---|---|---|
| gamedev | 1206 | 51.3% | #45 |
| dataviz | 1190 | 50.5% | #54 |
| asciiart | 1189 | 51.2% | #28 |
| website | 1186 | 48.6% | #62 |
| svg | 1177 | 54% | #40 |
| codecategories | 1173 | 47.2% | #62 |
| uicomponent | 1173 | 47.3% | #60 |
| godotgamedev | 1124 | 45.1% | #24 |
| mobileapps | 1114 | 41.4% | #31 |
| androidnative | 1084 | 35.2% | #26 |
| webapps | 1082 | 36.9% | #30 |
| 3d | 1063 | 35.3% | #87 |
| fullstack | 1025 | 36.4% | #32 |