GPT-5.1 Thinking
Overview
GPT-5.1 Thinking is the next iteration of GPT-5, designed with enhanced adaptive reasoning capabilities. Unlike GPT-5.1 Instant, GPT-5.1 Thinking adapts thinking time more precisely to each question, providing more thorough reasoning for complex queries. It offers improved conversational abilities with clearer and more engaging interactions, reducing jargon and enhancing user comprehension. GPT-5.1 Thinking demonstrates significant improvements in coding tasks and complex reasoning scenarios, making it valuable for developers and users who need deeper analysis.
GPT-5.1 Thinking was released on November 12, 2025. API access is available through OpenAI.
Performance
Timeline
Specifications
Benchmarks
GPT-5.1 Thinking Performance Across Datasets
Scores sourced from the model's scorecard, paper, or official blog posts
llm-stats.com - Thu Jan 08 2026Pricing
Pricing, performance, and capabilities for GPT-5.1 Thinking across different providers:
| Provider | Input ($/M) | Output ($/M) | Max Input | Max Output | Latency (s) | Throughput | Quantization | Input | Output |
|---|---|---|---|---|---|---|---|---|---|
OpenAI | $1.25 | $10.00 | 400.0K | 128.0K | 3.0 | 80.0 c/s | — | Text Image Audio Video | Text Image Audio Video |
API Access
API Access Coming Soon
API access for GPT-5.1 Thinking will be available soon through our gateway.
Recent Posts
Recent Reviews
FAQ
Common questions about GPT-5.1 Thinking