GPT-5.1 Codex mini
| Released | 2025-11-13 |
|---|---|
| Price per 1M | $0.25 in · $2.00 out |
| Overall score | 50.3 (early, few results) |
| Context window | 400,000 tokens |
| Provider | OpenAI |
| Weights | Proprietary |
Scores
| Dimension | Score | Rank | Benchmarks |
|---|---|---|---|
| Overall: Balanced | 50.3 | 2 | |
| Overall: Coding | 45.4 | 2 | |
| Overall: Agentic work | 54.6 | 1 | |
| Overall: Frontend | 33.2 | 1 | |
| Agents | 54.6 | 1 | |
| Frontend | 33.2 | 1 | |
| Value vs price | +3.7 |
Evidence
Agents 54.6 ±2.5
| Benchmark | Result | Source | Date |
|---|---|---|---|
| Terminal-Bench 2.0 | 61.6% | Epoch AI | 2025-11-12 |
Frontend 33.2 ±3.0
| Benchmark | Result | Source | Date |
|---|---|---|---|
| LMArena WebDev | 1,244 | LMArena | 2026-11-09 |
Results not used in the score
| Benchmark | Result | Source | Why not used |
|---|---|---|---|
| Terminal-Bench 2.0 | 43.2% | Epoch AI | A stronger configuration result was used |
| Terminal-Bench 2.0 | 43.1% | Epoch AI | A stronger configuration result was used |
Names matched to this model
gpt-5-1-codex-mini