OpenAI: GPT-5.1
by openai
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...
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Benchmarking OpenAI: GPT-5.1
Coding Performance
Coding benchmarks and performance metrics for development tasks
Coding Benchmarks
| Benchmark | Score |
|---|---|
| AA Coding Index | 44.7% |
| LiveCodeBench | 86.8% |
| SciCode | 43.3% |
| TerminalBench Hard | 45.5% |
| LCR | 75.0% |
| IFBench | 72.9% |
Speed & Efficiency
| Metric | Value |
|---|---|
| Output Speed | 119 tok/s |
Performance metrics from Artificial Analysis
Real-World Usage
Real-world usage statistics from the Kilo Code community
Weekly Token Usage
Mode Rankings (Last Week)
Where this model ranks for each built-in mode
Code
Write, modify, and refactor code
Ask
Get answers and explanations
Debug
Diagnose and fix software issues
Orchestrator
Coordinate tasks across multiple modes
Real-world metrics from the Kilo Code Leaderboard
Pricing
Cost per 1 million tokens
Example Cost
Analyzing a 10,000 line codebase (≈40k input tokens, 10k output tokens) costs approximately $0.1500
Coding Capabilities
Features and parameters relevant to coding tasks
Coding Features
Pricing details from OpenRouter
Technical Details
Architecture and implementation specifications
- Model ID
- openai/gpt-5.1
- Artificial Analysis Slug
- gpt-5-1
- Created
- November 13, 2025
- Tokenizer
- GPT
- Input Modalities
- image, text, file
- Context Window
- 400,000 tokens
- Max Completion Tokens
- 128,000 tokens
- Input Price
- $1.25 per 1M tokens
- Output Price
- $10.00 per 1M tokens
- Cache Read Price
- $0.13 per 1M tokens
- Content Moderation
- Disabled
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