GPT-5.1legacy
OpenAI · released Oct 8, 2025
Iterative GPT-5 update with improved chat behaviour.
42.3
Podium Score
#336 of 673
1455
Arena Elo
56 on Arena
60 t/s
Output Speed
$10/M
Output Price
$2.5/M in
400K
Context Window
Scores by Source
Category Scores
Benchmark Results
Model Details
| Release date | Oct 8, 2025 |
|---|---|
| Parameters | Not disclosed |
| License | Proprietary |
| Context Window | 400,000 tokens |
| Input Price | $2.5/M |
| Output Price | $10/M |
| Output Speed | 60 t/s |
| Time to First Token | — |