GPT-5.1: Benchmarks, Pricing & Context Window
GPT-5.1 is a language model from OpenAI, released in November 2025, with multimodal input, a 400K-token context window, and pricing from $1.25/M input and $10.00/M output.
The best model for coding and agentic tasks with configurable reasoning effort. GPT-5.1 is our flagship model for coding and agentic tasks with configurable reasoning and non-reasoning effort.
GPT-5.1 benchmarks
Capability tiers
Standing within each category, adjusted for leaderboard depth.
Real tasks performance
High-confidence performance for GPT-5.1 across real-world prompt categories. Only 95% intervals at most 4 points wide are shown.
Performance by conversation depth
How GPT-5.1 holds up as conversations get longer.
Quality Tracker
GPT-5.1 Performance Across Datasets
Scores sourced from the model's scorecard, paper, or official blog posts
llm-stats.com - Sun Sep 13 2026GPT-5.1 pricing
Providers
GPT-5.1 starts at $1.25 per million input tokens and $10.00 per million output tokens via OpenAI.
| Provider | Input $/M | Cached input $/M | Output $/M | Context in / out | TTFT p95 s | Output p5 c/s | Modalities in / out |
|---|---|---|---|---|---|---|---|
 OpenAI | $1.25 | — | $10.00 | 400.0K/128.0K | 2.00 | — | / |
Cached input is the discounted price for prompt tokens served from a provider cache. TTFT is time to first token. Output is characters per second; p5 is the sustained floor exceeded by 95% of observed requests.
GPT-5.1 context window
Input and output token limits for GPT-5.1, plus how it ranks on long-context understanding.
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GPT-5.1 latency
GPT-5.1 time to first token, sustained output throughput, and failed-request rate from live model usage over the trailing 7 days.
GPT-5.1 examples
Recent arena outputs from GPT-5.1, picked from the highest-ranked matchups.
GPT-5.1 license
GPT-5.1 is a proprietary model available under its provider's product and API terms, has a knowledge cutoff of September 2024.
- License
- Proprietary
- Hosted access
- Knowledge cutoff
- September 2024
Proprietary license - usage restrictions apply
GPT-5.1 resources
Official sources for GPT-5.1: provider documentation, official playground, official launch post.
GPT-5.1 vs other models
The most-compared alternatives to GPT-5.1 are Gemini 3 Pro, GPT-5 Medium, GPT-5.1 High. Open any pair side-by-side for benchmarks, pricing, context, and latency.
Models like GPT-5.1
Models ranked just above and below GPT-5.1 by LLM Stats score.
FAQ
Common questions about GPT-5.1.