GPT 5.1
OpenAI
An OpenAI model tracked on LMArena's text leaderboard. Pricing, context and licence below are sourced from LMArena's published dataset; this entry hasn't had an individual editorial write-up yet.
Pricing & specs verifiedSource: vendor documentation · checked Sep 3, 2026LMArena: 1438 (rank 94) · leaderboard · retrieved Sep 27, 2026
Pricing
$0.63 / $5 per 1M tokens
Context
400K tokens
LMArena Elo
1438
Overall rank
#94
Full Specifications
$0.63 / $5 per 1M tokens | |
|---|---|
| Identity | |
| Developer | OpenAI |
| Licence | Proprietary |
| Self-hostable | No |
| Cost | |
| Blended $/1M tokensinput × 0.75 + output × 0.25 | $1.723 / 1M tokens |
| Input price | $0.630 / 1M tokens |
| Output price | $5.000 / 1M tokens |
| Capacity | |
| Context window | 400K tokens |
| Measured quality | |
| LMArena Elo | 1438 (checked Sep 2026) |
| LMArena rank | Rank 94 |
| Elo per dollarLMArena Elo ÷ blended $/1M tokens | 835 |