Claude Sonnet 4 vs Mistral Small
A complete head-to-head: pricing, context window, benchmarks, modality coverage, and openness, with a programmatic verdict synthesized from the underlying data.
Updated
Claude Sonnet 4 specs · Mistral Small specs- PriceMistral Small
Mistral Small is roughly 25.0× cheaper on output tokens ($0.60 vs $15.00 per 1M).
- Context windowClaude Sonnet 4
Claude Sonnet 4 accepts 200K tokens vs 128K, 1.6× the room for long documents and codebases.
- BenchmarksTie
No directly comparable public benchmarks are available for both models, check the spec sheets for individual scores.
- ModalitiesClaude Sonnet 4
Claude Sonnet 4 supports 2 modalities (text, vision) vs 1 for Mistral Small.
- OpennessMistral Small
Mistral Small ships open weights (Apache-2.0); Claude Sonnet 4 is API-only.
It's a genuine coin-flip between Claude Sonnet 4 and Mistral Small: 2 category wins each, with the rest tied. Mistral Small is roughly 25.0× cheaper on output tokens ($0.60 vs $15.00 per 1M). Claude Sonnet 4 accepts 200K tokens vs 128K, 1.6× the room for long documents and codebases.
No directly comparable public benchmarks are available for both models, check the spec sheets for individual scores. They differ in modality coverage, Claude Sonnet 4 handles text, vision while Mistral Small handles text, which can be the deciding factor before you even look at benchmarks. Mistral Small ships open weights (Apache-2.0); Claude Sonnet 4 is API-only.
Claude Sonnet 4 is the newer of the two, released 8 months after Mistral Small, which usually means a more recent knowledge cutoff and updated safety post-training. Claude Sonnet 4 is usually picked for coding llm and rag workloads, while Mistral Small sees more deployments in cheapest llm and fastest llm. If pricing matters more than every last benchmark point, run the numbers in the calculator below before committing.
Side-by-side specs
| Spec | Claude Sonnet 4 | Mistral Small |
|---|---|---|
| Provider | Anthropic | Mistral |
| Released | May 2025 | Sep 2024 |
| Modalities | text, vision | text |
| Context window | 200K tokens | 128K tokens |
| Max output | , | , |
| Input · 1M | $3.00 / 1M tokens | $0.20 / 1M tokens |
| Output · 1M | $15.00 / 1M tokens | $0.60 / 1M tokens |
| Knowledge cutoff | 2025-03 | , |
| Open weights | No | Yes (Apache-2.0) |
| API available | Yes | Yes |
Pricing at scale
What you'd actually pay at typical workloads. Numbers come from each model's published per-million-token rates.
- Light usage, 100k in / 50k out per day$31.50 vs $1.50
- Heavy usage, 1M in / 500k out per day$315 vs $15.00
- RAG workload, 5M in / 200k out per day$540 vs $33.60
Light usage, 100k in / 50k out per day: $31.50 vs $1.50 per month, model B comes out ahead. Heavy usage, 1M in / 500k out per day: $315 vs $15.00 per month, model B comes out ahead. RAG workload, 5M in / 200k out per day: $540 vs $33.60 per month, model B comes out ahead.
Estimated spend for the listed models at your usage. Numbers are derived from each model's published per-million-token rates.
- Claude Sonnet 4$1.05
- Mistral Small$0.050
Benchmarks compared
Only sourced numbers. Where a benchmark is missing for one model we show the available value rather than fabricating the other.
- SWE-bench Verified65.0
Claude Sonnet 4 fits when…
- Solid all-rounder
- Mature deployment ecosystem
- Long-context tasks, handles 200K tokens vs 128K for Mistral Small.
- Multimodal needs covering vision.
Mistral Small fits when…
- Apache-2.0 open-weight
- Fast and cheap
- Cost-sensitive workloads, 25.0× cheaper than Claude Sonnet 4 on output tokens.
- Self-hosting and on-prem requirements, open weights (Apache-2.0).
Consider Claude Opus 4.7
Anthropic's mid-2026 flagship, ahead on SWE-bench, agent reliability, and writing quality.
Frequently asked
Is Claude Sonnet 4 or Mistral Small cheaper?
Mistral Small is cheaper at $0.60 / 1M tokens per million output tokens, vs $15.00 / 1M tokens for Claude Sonnet 4.Which has the larger context window?
Claude Sonnet 4 accepts 200K tokens vs 128K for Mistral Small.Is Claude Sonnet 4 or Mistral Small better for coding?
Both Claude Sonnet 4 and Mistral Small are competitive on coding benchmarks. See each model's individual spec page for HumanEval and SWE-bench scores where published. For an opinionated pick, consult our Best LLM for Coding ranking.Are either of these models open source?
Mistral Small ships open weights (Apache-2.0). Claude Sonnet 4 is API-only.When were Claude Sonnet 4 and Mistral Small released?
Claude Sonnet 4 was released by Anthropic on 2025-05-22. Mistral Small was released by Mistral on 2024-09-18.
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