Mistral: Mistral Small 4 API
About
Build advanced reasoning agents with Mistral: Mistral Small 4, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $0.15/1M input and $0.60/1M output tokens, native tool calling support, open weights architecture. Access Mistral: Mistral Small 4 via the Kilo Gateway API with up to 262K output tokens.
Capabilities
Input Modalities
imagetext
Output Modalities
text
Reasoning
Yes
Structured Output
Limits
Context Window
262K
Tokens
Input Limit
262K
Tokens
Max Output
262K
Tokens
Pricing
Standard (per 1M tokens)
Input
$0.15
Output
$0.60
Caching (per 1M tokens)
Read
$0.01
Frequently Asked Questions
Mistral: Mistral Small 4 by Kilo Gateway costs $0.15 per 1M input tokens and $0.60 per 1M output tokens. Cached reads cost $0.01 per 1M tokens.
Model Details
ID
mistralai/mistral-small-2603
Provider
Kilo GatewayFamily
Release Date
Mar 16, 2026
Knowledge Cutoff
N/A
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
KILO_API_KEY
API Base URL
https://api.kilo.ai/api/gateway