# Mistral Small 4

> Mistral Small 4 is a hybrid instruct-and-reasoning mixture-of-experts model on a 256k context window. Apache 2.0, and it takes image input as well as text. It folds Mistral's separate Instruct, reasoning and coding lines into one model, at $0.15 per 1M input and $0.60 per 1M output — roughly a tenth of Mistral Medium 3.5.

**ID**: `mistralai/mistral-small-4`  
**Creator**: Mistral AI  
**Category**: text  
**Context**: 262K tokens  
**Pricing**: $0.15 / $0.60 per 1M · billed by your provider (BYOK)  
**Released**: 2026-03-16  
**Web page**: https://anyrouter.dev/model/mistralai/mistral-small-4

**Input modalities**: text, image  
**Output modalities**: text  

**Tokenizer**: Mistral

**Capabilities**: chat, streaming, function-calling, vision, reasoning, coding

**Aliases**: `mistralai/mistral-small-2603`, `mistralai/mistral-small-latest`

## Usage

**Endpoint**: `POST https://anyrouter.dev/api/v1/chat/completions`

```bash
curl https://anyrouter.dev/api/v1/chat/completions \
  -H "Authorization: Bearer $ANYROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "mistralai/mistral-small-4",
  "messages": [
    {
      "role": "user",
      "content": "Say hi in 3 words."
    }
  ]
}'
```

## Providers

| Provider | Input | Output |
| --- | --- | --- |
| mistral-byok | $0.15/M (list) | $0.60/M (list) |
| openrouter-byok | $0.15/M (list) | $0.60/M (list) |

BYOK routes are billed by your own provider key — AnyRouter charges $0. Rates marked (list) are the provider's published list price.

## Source

- Upstream docs: https://docs.mistral.ai/getting-started/models/models_overview