Leaderboard / Model
GPT-5.3 Codex
OpenAI · Closed weights · Released Feb 5, 2026 · $1.75 in · $14 out per 1M tokens
n/aOverall · not enough data
Score by job
Coding
Not enough data · 2 of 5 benchmarks
| Benchmark | Result | Variant | z |
|---|---|---|---|
| Terminal-Bench | 78.4% | gpt-5.3-codex | 0.75 |
| SWE-bench Verified | 74.8% | gpt-5.3-codex_high | -0.47 |
Agents
Not enough data · 1 of 4 benchmarks
| Benchmark | Result | Variant | z |
|---|---|---|---|
| METR Time Horizons | 5.8 h | gpt-5.3-codex | -0.08 |
Reasoning
Not enough data · 0 of 4 benchmarks
Math
Not enough data · 0 of 5 benchmarks
Writing
Not enough data · 0 of 2 benchmarks
Design
8 · rank 43 · 1 of 1 benchmarks
| Benchmark | Result | Variant | z |
|---|---|---|---|
| LMArena WebDev | 1409 rating | gpt-5.3-codex (codex-harness) | -1.48 |