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OpenRouter

MAI DS R1 (free) API

OpenRouter
About

Build advanced reasoning agents with MAI DS R1 (free), a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers available completely free of charge, native tool calling support, open weights architecture. Access MAI DS R1 (free) via the OpenRouter API with up to 164K output tokens.

Capabilities

Input Modalities

text

Output Modalities

text
Reasoning
Yes
Structured Output
No
Tool Use
Yes
WeightsOpen
Temperature
Adjustable
Attachment
Not Supported
Limits
Context Window
164K

Tokens

Input Limit
164K

Tokens

Max Output
164K

Tokens

Pricing

Standard (per 1M tokens)

Input
Free
Output
Free
Frequently Asked Questions

MAI DS R1 (free) by OpenRouter costs Free per 1M input tokens and Free per 1M output tokens.

Model Details
ID
microsoft/mai-ds-r1:free
Provider
OpenRouter
Family
mai
Release Date
Apr 21, 2025
Knowledge Cutoff
Apr 1, 2025
API Integration
NPM Package
@openrouter/ai-sdk-provider
Environment Variables
OPENROUTER_API_KEY
API Base URL
https://openrouter.ai/api/v1
Documentation