GPT-5.1 Chat vs Mistral Medium 3.1
How do these models stack up? Below is an expert side-by-side comparison of specifications, context window capacity, live pricing per million tokens, and standardized benchmark scores for GPT-5.1 Chat and Mistral Medium 3.1.
GPT-5.1 Chat
GPT-5.1 Chat (AKA Instant is the fast, lightweight member of the 5.1 family, optimized for low-latency chat while retaining strong general intelligence. It uses adaptive reasoning to selectively “think” on...
Mistral Medium 3.1
Mistral Medium 3.1 is an updated version of Mistral Medium 3, which is a high-performance enterprise-grade language model designed to deliver frontier-level capabilities at significantly reduced operational cost. It balances...
Technical Specifications
| Specification | GPT-5.1 Chat | Mistral Medium 3.1 |
|---|---|---|
| Provider | OpenAI | Mistral |
| Context Window | 128,000 tokens | 131,072 tokens |
| Agent Suitability | N/A | N/A |
| Time to First Token (TTFT) | N/A | N/A |
| Deployment Model | managed api | self hostable |
| Production Stability | stable | stable |
| API Available | Yes | Yes |
| Released Date | 2025-11-13 | 2025-08-13 |
API Pricing Comparison
Input Price per Million Tokens
GPT-5.1 Chat
$1.25
Mistral Medium 3.1
$0.40
Output Price per Million Tokens
GPT-5.1 Chat
$10.00
Mistral Medium 3.1
$2.00
Want to test both models live?
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Benchmark Performance Metrics
Scores show the raw performance percentages verified across key evaluation suites. Higher bars indicate superior accuracy and capability in that domain.
GPT-5.1 Chat Quirks & Gotchas
No developer gotchas reported.
Mistral Medium 3.1 Quirks & Gotchas
No developer gotchas reported.