Claude Sonnet 4.5 vs Mistral Small 4
Compare Anthropic and Mistral AI AI models
Cost Comparison (1000 input + 500 output tokens, 100 requests/day)
Claude Sonnet 4.5
Mistral Small 4
Cost Differences
Mistral Small 4 costs less than Claude Sonnet 4.5
Feature Comparison
| Feature | Claude Sonnet 4.5 | Mistral Small 4 |
|---|---|---|
| Provider | Anthropic | Mistral AI |
| Input Price | $3.00/1M tokens | $0.15/1M tokens |
| Output Price | $15.00/1M tokens | $0.60/1M tokens |
| Context Window | 200,000 tokens | 128,000 tokens |
| Max Output | 64,000 tokens | 16,384 tokens |
| Category | balanced | efficient |
| Capabilities | textvisioncode | textvisioncodereasoning |
| Release Date | 9/29/2025 | 3/18/2026 |
Claude Sonnet 4.5 vs Mistral Small 4: Which Should You Choose?
Choosing between Claude Sonnet 4.5 and Mistral Small 4 depends on your priorities: cost efficiency, context length, or raw capability. Mistral Small 4 is the more affordable option at $0.15/1M input tokens — 95% cheaper than Claude Sonnet 4.5. Meanwhile, Claude Sonnet 4.5 offers a significantly larger context window at 200,000 tokens vs 128,000 for Mistral Small 4.
These models come from different providers — Anthropic and Mistral AI — which means different API ecosystems, SDKs, rate limits, and terms of service. If you're already integrated with Anthropic, switching to Mistral AIinvolves migration effort beyond just pricing. Factor in your existing infrastructure when deciding.
These models target different tiers: Claude Sonnet 4.5 is a balanced model while Mistral Small 4 is efficient. This means they're optimized for different workloads. Mistral Small 4 targets more demanding workloads, while Claude Sonnet 4.5 provides a cost-effective option for everyday tasks.
Output costs matter too. Claude Sonnet 4.5 charges $15.00/1M output tokens vs $0.60 for Mistral Small 4. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. Mistral Small 4 has the edge here at $0.60/1M output tokens.
Multimodal capabilities: Both models support vision (image understanding), so you can send images alongside text prompts with either option.
Best Use Cases
Choose Claude Sonnet 4.5 when:
- • You need a larger context window (200,000 tokens)
- • You need longer outputs (up to 64,000 tokens)
- • You're already using Anthropic's API ecosystem
Choose Mistral Small 4 when:
- • Budget is a primary concern
- • You need more capabilities (reasoning)
- • You're already using Mistral AI's API ecosystem
- • You're running high-volume, latency-sensitive workloads
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
Claude Sonnet 4.5 (Anthropic)
Mistral Small 4 (Mistral AI)
Start using Claude Sonnet 4.5 today
Sign Up for Anthropic →Start using Mistral Small 4 today
Sign Up for Mistral AI →