Model comparison
Grok 4.20 Reasoning vs Mistral Medium 3.5
Compare Grok 4.20 Reasoning vs Mistral Medium 3.5 API pricing: input/output token costs, cache pricing, context windows, workload estimates, and routing fit.
Grok 4.20 Reasoning
xai · grok-4.20-0309-reasoning
- Input
- $1.25
- Output
- $2.5
- Context
- 1M
Mistral Medium 3.5
mistral · mistral/mistral-medium-3-5
- Input
- $1.5
- Output
- $7.5
- Context
- 262.1K
Quick take
Grok 4.20 Reasoning has the lower input price at $1.25 per 1M input tokens. Grok 4.20 Reasoning is cheaper for the example blended workload below. Grok 4.20 Reasoning has the larger context window at 1M tokens.
Choose Grok 4.20 Reasoning if...
- Grok 4.20 Reasoning is the better default for cost-sensitive traffic and repeated high-volume calls.
- Grok 4.20 Reasoning is safer for long documents, repository analysis, and RAG prompts because it has the larger context window.
- Grok 4.20 Reasoning gives more room for long generated answers, reports, or code output.
Choose Mistral Medium 3.5 if...
- Mistral Medium 3.5 is required if images, screenshots, or visual documents are part of the workflow.
Example workload cost
Estimates use input tokens plus 20% output tokens. They exclude provider discounts, cache hits, and tool/search surcharges.
| Workload | Grok 4.20 Reasoning | Mistral Medium 3.5 | Cheaper |
|---|---|---|---|
| 1M input + 200K output | $1.75 | $3.00 | Grok 4.20 Reasoning |
| 10M input + 2M output | $17.50 | $30.00 | Grok 4.20 Reasoning |
| 100M input + 20M output | $175.00 | $300.00 | Grok 4.20 Reasoning |
Context, output, and capability fit
Grok 4.20 Reasoning provides the larger context window. Check max output separately when the task needs long reports, code generation, or full-document rewrites.
- Grok 4.20 Reasoning max output
- 1M
- Mistral Medium 3.5 max output
- 262.1K
- Grok 4.20 Reasoning features
- prompt caching, function calling
- Mistral Medium 3.5 features
- function calling, vision
Risk notes for Grok 4.20 Reasoning
- No major capability risk is flagged in this snapshot, but provider pages should still be verified before production routing.
Risk notes for Mistral Medium 3.5
- No prompt caching in this snapshot: repeated long-context calls may be more expensive.
Routing tags
frontierreasoningagentslong-contextmultimodalragcodingopen-weightenterpriselocal-open