GPT-5.1
OpenAIProprietaryReleased Nov 13, 2025
GPT-5.1 is not on the arena.ai Agents leaderboard, so it has no rank on our default leaderboard; the other data below is for reference. GPT-5.1 ranks #69 on the LMArena Text leaderboard (style control) with an Arena score of 1455.7 (±3.7, 41,639 votes). API price: $1.25 input / $10.00 output per 1M tokens. Context: 400K. Nearest rivals: GLM-5 (1457.2) above and Qwen3.7 Plus (1455.7) below.
Quick answer
- Agents leaderboard
- No result yet
- Text (LMArena)
- #69 · 1455.7
- API price (in / out)
- $1.25 / $10.00 per 1M tokens
- Closest rival
- GLM-5 · 1457.2
- Cheaper alternative
- MiMo V2.5 Pro: Text 1466.6, output $1.02 (90% cheaper)
- Data updated
- Oct 30, 2026 · synced daily
Sources: arena.ai, LMArena, Artificial Analysis, OpenRouter
Key metrics
Rank history
LMArena rank, last 15 days#68 on Oct 16, #69 now; best #68 in this period.
Models ranked nearby
Sorted by Arena score| # | Model | Arena | Intel. | Output $ | tok/s |
|---|---|---|---|---|---|
| 44 |  Kimi K2.6 | 1461.0 | – | $4.00 | – |
| 45 |  Qwen3.6 Max | 1460.2 | – | – | – |
| 46 |  GLM-5 | 1457.2 | – | $3.20 | – |
| 47 | GPT-5.1This page | 1455.7 | – | $10.00 | – |
| 48 | Qwen3.7 Plus | 1455.7 | – | $1.60 | 55 |
| 49 |  Grok 4.6 | 1455.5 | – | $6.00 | – |
| 50 |  Hy3 | 1454.5 | – | $0.56 | 84 |
More from OpenAI
| # | Model | Arena | Intel. | Output $ | tok/s |
|---|---|---|---|---|---|
| 19 | GPT-5.6 Sol | 1484.9 | – | $20.00 | – |
| 23 | GPT-5.5 | 1481.7 | – | $30.00 | – |
| 24 | GPT-6.1 Sol | 1481.3 | 54.5 | $10.00 | 89 |
| 30 | GPT-5.2 Chat | 1475.7 | – | $14.00 | – |
| 31 | GPT-6 Astra | 1475.6 | 56.9 | $50.00 | 89 |
| 33 | GPT-5.4 | 1475.3 | – | $15.00 | – |
Pricing
- Official API list price: $1.25 input and $10.00 output per 1M tokens (USD).
- At a typical 3:1 input-to-output ratio, the blended cost is about $3.44 per 1M tokens.
- Among 67 models with an output price, it is the #38 cheapest.
- The cheapest OpenRouter route charges $1.25 input / $10.00 output.
Sources & methodology
GPT-5.1 is not on the arena.ai Agents leaderboard, so it has no rank on our default leaderboard; the other data below is for reference.
- arena.ai Agents — agent Net Improvement, 95% interval, sessions and rank (via the public Hugging Face dataset, CC BY 4.0).
- LMArena — Arena score (Text leaderboard with style control, the same view arena.ai shows by default), 95% confidence interval, votes and rank.
- Artificial Analysis — Intelligence / Coding Index, output speed and latency (medians).
- OpenRouter — Route prices, context length and listing date.
Arena scores use the Bradley-Terry model (not Elo); ± is the half-width of the 95% confidence interval. Latency figures are Artificial Analysis medians; for reasoning models, time to first token and to first answer include the thinking phase. Data syncs daily at 14:20 (UTC+8).
Limits: Arena scores come from anonymous users voting on chats, so they reflect conversational preference rather than agent or coding benchmarks; with few votes the interval is wide and ranks move. Prices and speeds change as providers update them.
FAQ
What rank is GPT-5.1 right now?
GPT-5.1 is #47 on our leaderboard of 63 scored models (Arena score 1455.7); its raw LMArena rank is #69.
What does GPT-5.1 cost via API?
Input $1.25 / output $10.00 per 1M tokens (official API list price; the OpenRouter quote when no official price is available). At a typical 3:1 input-to-output ratio, the blended cost is about $3.44 per 1M tokens.
How close is GPT-5.1 to the models ranked next to it?
It is 1.5 points behind GLM-5 (1457.2) and 0.0 points ahead of Qwen3.7 Plus (1455.7); gaps smaller than the confidence interval (±3.7) are not significant.
Is GPT-5.1 open source? Can it be self-hosted?
GPT-5.1 is a closed model, available only via official APIs or hosted services.
What is the context length of GPT-5.1?
400K (400,000 tokens, as listed on OpenRouter).
GPT-5.1 vs GLM-5: which is better?
On the LMArena Text leaderboard GPT-5.1 scores 1455.7 and GLM-5 scores 1457.2 (a 1.5-point gap, within the confidence interval, so not significant). On price, GPT-5.1 costs $10.00 and GLM-5 $3.20 per 1M output tokens.
Is there a cheaper model close to GPT-5.1?
Yes: MiMo V2.5 Pro scores 1466.6 on the Text leaderboard (GPT-5.1: 1455.7) and costs $1.02 per 1M output tokens, about 90% less than GPT-5.1 ($10.00).
Where does the GPT-5.1 data come from and how often is it updated?
Agent success rates come from the arena.ai Agents leaderboard (CC BY 4.0), Text scores from LMArena, intelligence and speed from Artificial Analysis, and prices and context from official list prices and OpenRouter. 17NAS syncs daily at 06:20 UTC; this page was last updated Oct 30, 2026.