Grok 3 Mini vs Mistral Magistral Small 2509
Grok 3 Mini (2025) and Mistral Magistral Small 2509 (2025) are general-purpose language models from xAI and MistralAI. Grok 3 Mini ships a 131k-token context window, while Mistral Magistral Small 2509 ships a not-yet-sourced context window. On pricing, Grok 3 Mini costs $0.3/1M input tokens versus $0.5/1M for the alternative. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit.
Grok 3 Mini is ~67% cheaper at $0.3/1M; pay for Mistral Magistral Small 2509 only for provider fit.
Specs
| Released | 2025-02-17 | 2025-09-01 |
| Context window | 131k | — |
| Parameters | — | — |
| Architecture | - | - |
| License | Proprietary | Proprietary |
| Knowledge cutoff | - | - |
Pricing and availability
| Grok 3 Mini | Mistral Magistral Small 2509 | |
|---|---|---|
| Input price | $0.3/1M tokens | $0.5/1M tokens |
| Output price | $0.5/1M tokens | $1.5/1M tokens |
| Providers |
Capabilities
| Grok 3 Mini | Mistral Magistral Small 2509 | |
|---|---|---|
| Vision | ||
| Multimodal | ||
| Reasoning | ||
| Function calling | ||
| Tool use | ||
| Structured outputs | ||
| Code execution |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on multimodal input: Grok 3 Mini and structured outputs: Grok 3 Mini. Both models share the core language-model surface, so the practical split is not just feature count. Use those differences to decide whether the page is about raw model quality, agentic coding support, multimodal ingestion, or predictable structured API behavior.
For cost, Grok 3 Mini lists $0.3/1M input and $0.5/1M output tokens, while Mistral Magistral Small 2509 lists $0.5/1M input and $1.5/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Grok 3 Mini lower by about $0.44 per million blended tokens. Availability is 1 providers versus 1, so concentration risk also matters.
Choose Grok 3 Mini when provider fit and lower input-token cost are central to the workload. Choose Mistral Magistral Small 2509 when provider fit are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship. This keeps the decision grounded in measurable tradeoffs instead of brand-level assumptions. It also helps separate model capability from provider packaging, which can change cost and latency.
FAQ
Which is cheaper, Grok 3 Mini or Mistral Magistral Small 2509?
Grok 3 Mini is cheaper on tracked token pricing. Grok 3 Mini costs $0.3/1M input and $0.5/1M output tokens. Mistral Magistral Small 2509 costs $0.5/1M input and $1.5/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Grok 3 Mini or Mistral Magistral Small 2509 open source?
Grok 3 Mini is listed under Proprietary. Mistral Magistral Small 2509 is listed under Proprietary. License labels affect whether you can self-host, redistribute weights, or rely only on hosted APIs, so confirm the upstream license before deployment.
Which is better for multimodal input, Grok 3 Mini or Mistral Magistral Small 2509?
Grok 3 Mini has the clearer documented multimodal input signal in this comparison. If multimodal input is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for structured outputs, Grok 3 Mini or Mistral Magistral Small 2509?
Grok 3 Mini has the clearer documented structured outputs signal in this comparison. If structured outputs is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run Grok 3 Mini and Mistral Magistral Small 2509?
Grok 3 Mini is available on OpenRouter. Mistral Magistral Small 2509 is available on AWS Bedrock. Provider coverage can affect latency, region availability, compliance posture, and fallback options. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
When should I pick Grok 3 Mini over Mistral Magistral Small 2509?
Grok 3 Mini is ~67% cheaper at $0.3/1M; pay for Mistral Magistral Small 2509 only for provider fit. If your workload also depends on provider fit, start with Grok 3 Mini; if it depends on provider fit, run the same evaluation with Mistral Magistral Small 2509.
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Last reviewed: 2026-04-24. Data sourced from public model cards and provider documentation.