GPT-5.1 Codex
| Released | 2025-11-13 |
|---|---|
| Price per 1M | $1.25 in · $10.00 out |
| Overall score | 54.2 · rank 80 |
| Context window | 400,000 tokens |
| Provider | OpenAI |
| Weights | Proprietary |
Scores
| Dimension | Score | Rank | Benchmarks |
|---|---|---|---|
| Overall: Balanced | 54.2 | 80 | 4 |
| Overall: Coding | 53.8 | 78 | 4 |
| Overall: Agentic work | 54.6 | 79 | 2 |
| Overall: Frontend | 47.5 | 116 | 3 |
| Coding | 56.9 | 58 | 1 |
| Agents | 53.6 | 84 | 1 |
| Frontend | 42.8 | 103 | 2 |
| Value vs price | +2.7 | 99 |
Configurations
| Configuration | Balanced | Benchmarks |
|---|---|---|
| Unspecified setting | 53.8 ±4.2 | 3 |
| High | 43.0 ±6.0 | 1 |
Evidence
Coding 56.9 ±5.3
| Benchmark | Result | Source | Date |
|---|---|---|---|
| LiveCodeBench (Vals run) | 85.6% | Vals AI | 2026-09-01 |
Agents 53.6 ±2.5
| Benchmark | Result | Source | Date |
|---|---|---|---|
| Terminal-Bench 2.0 | 57.8% | Epoch AI | 2025-11-16 |
Frontend 42.8 ±0.7
| Benchmark | Result | Source | Date |
|---|---|---|---|
| Vibe Code Bench v1.1 | 13.1% | Vals AI | 2026-11-09 |
| LMArena WebDev | 1,338 | LMArena | 2026-11-09 |
Results not used in the score
| Benchmark | Result | Source | Why not used |
|---|---|---|---|
| Terminal-Bench 2.0 | 57.8% | Epoch AI | A stronger configuration result was used |
| Terminal-Bench 2.0 | 53.5% | Epoch AI | A stronger configuration result was used |
| Terminal-Bench 2.0 | 36.9% | Epoch AI | A stronger configuration result was used |
Names matched to this model
gpt-5-1-codex