OpenAI: GPT-5.1
Analysis Summary
GPT-5.1 is OpenAI's mid-generation flagship, posting an intelligence index of 47.7 and an agentic index of 63.7. GPQA at 0.873, MMLU Pro at 0.870, and livecodebench at 0.868 confirm strong performance across reasoning, knowledge, and coding tasks. Vision, tool use, function calling, and a 400K context window round out a broad capability profile suited to complex business use.
For businesses, GPT-5.1 is well-suited to autonomous coding agents, long-document analysis, multimodal content workflows, and customer-facing applications requiring reliable instruction following. The terminalbench hard score of 0.455 and tau2 of 0.819 support agentic reliability. Its main limitation is that newer GPT-5.x variants now exceed it on most benchmarks.
At $1.25 input and $10.00 output, pricing is reasonable for the capability tier. Teams already in the OpenAI ecosystem will find GPT-5.1 a strong, well-rounded choice for high-value tasks, with the understanding that the latest GPT-5.5 variants offer further gains.
Assessed June 6, 2026
Editorial notes
GPT-5.1 from OpenAI delivers excellent reasoning, strong agentic performance, vision, and a 400K context window, making it a capable all-round model for demanding business workflows.
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
Performance Profile
How OpenAI: GPT-5.1 compares
OpenAI: GPT-5.1 ranks #125 of 378 AI models we track for overall intelligence, #100 of 315 for coding, #126 of 289 for agentic tasks. Its 400K-token context window is larger than 85% of the models we list. At $1.25 per million input tokens it is cheaper than 21% of comparable models.
About OpenAI: GPT-5.1
GPT-5.1 is the latest frontier-grade model in the GPT-5 series, offering stronger general-purpose reasoning, improved instruction adherence, and a more natural conversational style compared to GPT-5. It uses adaptive reasoning..
Capabilities
Performance Indices
Source: Artificial Analysis
Benchmark Scores
Intelligence
Technical
Content
Benchmark data from Artificial Analysis and Hugging Face
How does OpenAI: GPT-5.1 stack up?
Compare side-by-side with other professional models.
Model Information
| OpenRouter ID |
openai/gpt-5.1
|
| Provider | openai |
| Release Date | November 13, 2025 |
| Context Length | 400,000 tokens |
| Max Completion | 128,000 tokens |
| Status | Active |
Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $1.25 | $0.001250 |
| Output | $10.00 | $0.010000 |
Live Performance
Live endpoint metrics, refreshed every 30 minutes.
Leaderboard Categories
External Resources
Frequently asked questions about OpenAI: GPT-5.1
How much does OpenAI: GPT-5.1 cost?
OpenAI: GPT-5.1 costs $1.25 per million input tokens and $10.00 per million output tokens.
What is the context window of OpenAI: GPT-5.1?
OpenAI: GPT-5.1 has a context window of 400,000 tokens (400K).
Is OpenAI: GPT-5.1 good for coding?
On our coding benchmark index, OpenAI: GPT-5.1 ranks #100 of 315 models, placing it in the broader range of the field for code generation and debugging.
What can OpenAI: GPT-5.1 do?
OpenAI: GPT-5.1 supports image/vision input, tool use, and function calling.
Who created OpenAI: GPT-5.1?
OpenAI: GPT-5.1 is developed by OpenAI and was released on November 13, 2025.
