Grok 4.5 vs Mistral Medium 3.5
Grok 4.5 (xAI) 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 $2.00 per 1M.
- Grok 4.5 has a larger context window (500K vs 262K tokens).
- Grok 4.5 ranks higher for coding (91th vs 23th percentile).
| Attribute | Grok 4.5 | Mistral Medium 3.5 |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 154 | — |
| Coding | 91 | 23 |
| Math | 85 | — |
| Reasoning & Knowledge | 70 | 23 |
| Agentic & Tools | 76 | 77 |
| Specifications | ||
| Developer | xAI | Mistral AI |
| Family | Grok | Mistral |
| Released | Jul 8, 2026 | Apr 28, 2026 |
| Parameters | — | — |
| Availability | API access | Open weights (restricted use) |
| Context window | 500K | 262K |
| Price — $/M input | $2.00 | $1.50 |
| Price — $/M output | $6.00 | $7.50 |
| Inputs | text, image, file | text, image, file |
| Outputs | text | text |
| Benchmarks | ||
| AIME 2024/2025 | 98% | — |
| APEX | 34% | — |
| ARC-AGI | 87% | — |
| ARC-AGI-2 | 53% | — |
| GPQA Diamond | 93% | 75% |
| Humanity's Last Exam | 40% | 13% |
| SciCode | 54% | 40% |
| SimpleBench | 70% | — |
| SimpleQA Verified | 54% | — |
| WebDev Arena | 1551 | 1267 |
| WeirdML | 46% | 44% |
| τ²-bench | — | 94% |
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, Grok 4.5 or Mistral Medium 3.5?
Mistral Medium 3.5 is cheaper on input tokens at $1.50 per million, versus $2.00 (representative OpenRouter pricing).
Which has a larger context window, Grok 4.5 or Mistral Medium 3.5?
Grok 4.5 supports up to 500K tokens, compared with 262K for the other.
Which is better for coding, Grok 4.5 or Mistral Medium 3.5?
Across coding benchmarks like SWE-bench Verified and Terminal-Bench, Grok 4.5 ranks higher — 91th 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.