GPT-5.6 Sol vs Mistral Medium 3.5
GPT-5.6 Sol (OpenAI) and Mistral Medium 3.5 (Mistral AI) compared on benchmarks, pricing, context window, and use-case rankings.
- Mistral Medium 3.5 is cheaper on input tokens — $1.50 vs $5.00 per 1M.
- GPT-5.6 Sol has a larger context window (1.1M vs 262K tokens).
- GPT-5.6 Sol ranks higher for coding (95th vs 23th percentile).
| Attribute | GPT-5.6 Sol | Mistral Medium 3.5 |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 162 | — |
| Coding | 95 | 23 |
| Math | 97 | — |
| Reasoning & Knowledge | 95 | 23 |
| Agentic & Tools | 67 | 77 |
| Specifications | ||
| Developer | OpenAI | Mistral AI |
| Family | GPT | Mistral |
| Released | Jul 9, 2026 | Apr 28, 2026 |
| Parameters | — | — |
| Availability | API access | Open weights (restricted use) |
| Context window | 1.1M | 262K |
| Price — $/M input | $5.00 | $1.50 |
| Price — $/M output | $30.00 | $7.50 |
| Inputs | file, image, text | text, image, file |
| Outputs | text | text |
| Benchmarks | ||
| AIME 2024/2025 | 100% | — |
| APEX | 40% | — |
| ARC-AGI | 98% | — |
| ARC-AGI-2 | 93% | — |
| GPQA Diamond | 93% | 75% |
| Humanity's Last Exam | 47% | 13% |
| SciCode | 56% | 40% |
| SimpleBench | 72% | — |
| SimpleQA Verified | 72% | — |
| WeirdML | 89% | 44% |
| τ²-bench | 85% | 94% |
| WebDev Arena | — | 1267 |
Use-case scores are 0–100 percentile composites across each area’s benchmarks, ranked against every model from the past year. Highlighted cells lead each row. Open a model for the full picture.
Frequently asked questions
Which is cheaper, GPT-5.6 Sol or Mistral Medium 3.5?
Mistral Medium 3.5 is cheaper on input tokens at $1.50 per million, versus $5.00 (representative OpenRouter pricing).
Which has a larger context window, GPT-5.6 Sol or Mistral Medium 3.5?
GPT-5.6 Sol supports up to 1.1M tokens, compared with 262K for the other.
Which is better for coding, GPT-5.6 Sol or Mistral Medium 3.5?
Across coding benchmarks like SWE-bench Verified and Terminal-Bench, GPT-5.6 Sol ranks higher — 95th vs 23th percentile among the models tracked on Model Beat.
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Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.