| Signal | GPT-5.1-Codex | Delta | Mistral Medium 3.1 |
|---|---|---|---|
Capabilities | 83 | +17 | |
Benchmarks | 88 | +88 | |
Pricing | 90 | -8 | |
Context window size | 89 | +8 | |
Recency | 100 | +16 | |
Output Capacity | 85 | +65 | |
| Overall Result | 5 wins | of 6 | 1 wins |
Score History
87
current score
GPT-5.1-Codex
right now
40
current score
OpenAI
Mistral AI
Mistral Medium 3.1 saves you $485.00/month
That's $5820.00/year compared to GPT-5.1-Codex at your current usage level of 100K calls/month.
| Metric | GPT-5.1-Codex | Mistral Medium 3.1 | Winner |
|---|---|---|---|
| Overall Score | 87 | 40 | GPT-5.1-Codex |
| Rank | #19 | #258 | GPT-5.1-Codex |
| Quality Rank | #19 | #258 | GPT-5.1-Codex |
| Adoption Rank | #19 | #258 | GPT-5.1-Codex |
| Parameters | -- | -- | -- |
| Context Window | 400K | 131K | GPT-5.1-Codex |
| Pricing | $1.25/$10.00/M | $0.40/$2.00/M | -- |
| Signal Scores | |||
| Capabilities | 83 | 67 | GPT-5.1-Codex |
| Benchmarks | 88 | -- | GPT-5.1-Codex |
| Pricing | 90 | 98 | Mistral Medium 3.1 |
| Context window size | 89 | 81 | GPT-5.1-Codex |
| Recency | 100 | 84 | GPT-5.1-Codex |
| Output Capacity | 85 | 20 | GPT-5.1-Codex |
Our score (0-100) is driven by benchmark performance (90%) from Arena Elo ratings, MMLU, GPQA, HumanEval, SWE-bench, and 15+ standardized evaluations. Capabilities and context window serve as tiebreakers (10%). Learn more about our methodology.
Scores 87/100 (rank #19), placing it in the top 94% of all 290 models tracked.
Scores 40/100 (rank #258), placing it in the top 11% of all 290 models tracked.
GPT-5.1-Codex has a 47-point advantage, which typically translates to noticeably stronger performance on complex reasoning, code generation, and multi-step tasks.
Mistral Medium 3.1 offers 79% better value per quality point. At 1M tokens/day, you'd spend $36.00/month with Mistral Medium 3.1 vs $168.75/month with GPT-5.1-Codex - a $132.75 monthly difference.
Both models have comparable response speeds. For most applications, the latency difference is negligible.
When latency matters most: Interactive chatbots, IDE code completion, real-time translation, and user-facing applications where response time directly impacts experience. For batch processing, background summarization, or offline analysis, latency is less critical.
Code generation & review
Based on overall model capabilities and architecture for coding tasks like generating functions, debugging, and refactoring
Customer support chatbot
Suitable for user-facing chat with competitive response times. Mistral Medium 3.1 also offers lower per-token costs for high-volume support
Long document analysis
Larger context window (400K tokens) can process longer documents, contracts, and research papers in a single pass
Batch data extraction
Lower output pricing ($2.00/M) reduces costs when processing thousands of records daily
Creative writing & content
Higher overall composite score (87/100) correlates with better nuance, coherence, and style in long-form content
Image understanding & OCR
Supports vision input - can analyze screenshots, diagrams, photos, and scanned documents directly
GPT-5.1-Codex clearly outperforms Mistral Medium 3.1 with a significant 47-point lead. For most general use cases, GPT-5.1-Codex is the stronger choice. However, Mistral Medium 3.1 may still excel in niche scenarios.
Best for Quality
GPT-5.1-Codex
Marginally better benchmark scores; both are excellent
Best for Cost
Mistral Medium 3.1
79% lower pricing; better value at scale
Best for Reliability
GPT-5.1-Codex
Higher uptime and faster response speeds
Best for Prototyping
GPT-5.1-Codex
Stronger community support and better developer experience
Best for Production
GPT-5.1-Codex
Wider enterprise adoption and proven at scale
by OpenAI
| Capability | GPT-5.1-Codex | Mistral Medium 3.1 |
|---|---|---|
| Vision (Image Input) | ||
| Function Calling | ||
| Streaming | ||
| JSON Mode | ||
| Reasoningdiffers | ||
| Web Search | ||
| Image Output |
OpenAI
Mistral AI
Mistral Medium 3.1 saves you $11.13/month
That's 78% cheaper than GPT-5.1-Codex at 1,000 tokens/request and 100 requests/day.
Assumes 60% input / 40% output token ratio per request. Actual costs may vary based on your usage pattern.
| Parameter | GPT-5.1-Codex | Mistral Medium 3.1 |
|---|---|---|
| Context Window | 400K | 131K |
| Max Output Tokens | 128,000 | -- |
| Open Source | No | No |
| Created | Nov 13, 2025 | Aug 13, 2025 |