Mistral: Mistral Small 4
Mistral Small 4 is a model from Mistral AI that accepts text and image inputs and returns text. It offers a 262,144-token context window with completions up to 209,715 tokens, which makes it suitable for long documents or extended conversations in a single pass. It supports tool calling and a reasoning mode. The listing does not specify whether it supports structured output or whether its weights are openly available. At $0.15 per million input tokens and $0.60 per million output tokens, it sits in the low-cost tier. That makes it worth shortlisting for high-volume workloads that need image input, tool use, or long context without premium pricing. Its benchmark standing is thin: the blended score of 6.1 comes from a single independent benchmark, with an AI Index score of 7.7. Teams should treat its quality as unproven and test it on their own tasks before committing.
Benchmark results
Independent, published benchmarks. Blended score 6.1 across 1 benchmark, last refreshed 2026-11-08. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 7.7 |
- Model ID
- mistralai/mistral-small-2603
- Vendor
- mistralai
- Released
- March 2026
- Tokenizer
- Mistral
- Input Modalities
- text, image
- Output Modalities
- text
- Max Output
- 209,715 tokens
- Tool Calling
- ✓ supported
- Structured Output
- ✓ supported
- Reasoning Mode
- ✓ supported
- Vision
- ✓ accepts images
- Audio
- no
- Moderated
- no
What it costs in practice
Computed from the current $0.15/M input and $0.60/M output rates. Run your own numbers →
| Job | Tokens | Cost |
|---|---|---|
| Summarize a 50-page report | 30k in / 1.5k out | under $0.01 |
| Classify 1,000 customer emails | 500k in / 50k out | $0.10 |
| A month of a busy support chatbot | 5M in / 2M out | $1.95 |
Similar models
Mistral: Mistral Large 4
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Mistral: Mistral Medium 3.5 (batch)
Mistral: Mistral Large 3 2512
Mistral: Mistral Small 3.2 24B
Mistral: Ministral 3 14B 2512
Quick answers
- How much does Mistral: Mistral Small 4 cost?
- $0.15 per million input tokens and $0.60 per million output tokens.
- What is Mistral: Mistral Small 4's context window?
- 262,144 tokens, roughly 393 pages of text in a single request.
- Does Mistral: Mistral Small 4 support tool calling?
- It supports tool calling, structured output, a reasoning mode.
- Can Mistral: Mistral Small 4 process images?
- Yes, it accepts image input.