| Signal | GPT-5.5 | Delta | Mistral Medium 3.5 |
|---|---|---|---|
Capabilities | 100 | +17 | |
Benchmarks | 93 | +23 | |
Pricing | 70 | -22 | |
Context window size | 86 | +9 | |
Recency | 100 | -- | |
Output Capacity | 85 | +65 | |
| Overall Result | 4 wins | of 6 | 1 wins |
Score History
92.2
current score
GPT-5.5
right now
71.2
current score
OpenAI
Mistral AI
Mistral Medium 3.5 saves you $1475.00/month
That's $17700.00/year compared to GPT-5.5 at your current usage level of 100K calls/month.
| Metric | GPT-5.5 | Mistral Medium 3.5 | Winner |
|---|---|---|---|
| Overall Score | 92 | 71 | GPT-5.5 |
| Rank | #6 | #85 | GPT-5.5 |
| Quality Rank | #6 | #85 | GPT-5.5 |
| Adoption Rank | #6 | #85 | GPT-5.5 |
| Parameters | -- | -- | -- |
| Context Window | 1050K | 262K | GPT-5.5 |
| Pricing | $5.00/$30.00/M | $1.50/$7.50/M | -- |
| Signal Scores | |||
| Capabilities | 100 | 83 | GPT-5.5 |
| Benchmarks | 93 | 70 | GPT-5.5 |
| Pricing | 70 | 93 | Mistral Medium 3.5 |
| Context window size | 86 | 77 | GPT-5.5 |
| Recency | 100 | 100 | GPT-5.5 |
| Output Capacity | 85 | 20 | GPT-5.5 |
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 92/100 (rank #6), placing it in the top 98% of all 290 models tracked.
Scores 71/100 (rank #85), placing it in the top 71% of all 290 models tracked.
GPT-5.5 has a 21-point advantage, which typically translates to noticeably stronger performance on complex reasoning, code generation, and multi-step tasks.
Mistral Medium 3.5 offers 74% better value per quality point. At 1M tokens/day, you'd spend $135.00/month with Mistral Medium 3.5 vs $525.00/month with GPT-5.5 - a $390.00 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 3.5 also offers lower per-token costs for high-volume support
Long document analysis
Larger context window (1050K tokens) can process longer documents, contracts, and research papers in a single pass
Batch data extraction
Lower output pricing ($7.50/M) reduces costs when processing thousands of records daily
Creative writing & content
Higher overall composite score (92/100) 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-5.5 clearly outperforms Mistral Medium 3.5 with a significant 21-point lead. For most general use cases, GPT-5.5 is the stronger choice. However, Mistral Medium 3.5 may still excel in niche scenarios.
Best for Quality
GPT-5.5
Marginally better benchmark scores; both are excellent
Best for Cost
Mistral Medium 3.5
74% lower pricing; better value at scale
Best for Reliability
GPT-5.5
Higher uptime and faster response speeds
Best for Prototyping
GPT-5.5
Stronger community support and better developer experience
Best for Production
GPT-5.5
Wider enterprise adoption and proven at scale
by OpenAI
| Capability | GPT-5.5 | Mistral Medium 3.5 |
|---|---|---|
| Vision (Image Input) | ||
| Function Calling | ||
| Streaming | ||
| JSON Mode | ||
| Reasoning | ||
| Web Searchdiffers | ||
| Image Output |
OpenAI
Mistral AI
Mistral Medium 3.5 saves you $33.30/month
That's 74% cheaper than GPT-5.5 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-5.5 | Mistral Medium 3.5 |
|---|---|---|
| Context Window | 1.1M | 262K |
| Max Output Tokens | 128,000 | -- |
| Open Source | No | No |
| Created | Apr 24, 2026 | Apr 30, 2026 |