Mistral Releases Magistral RL Reasoning Model

The Mistral team at it again with Magistral! A reasoning model designed to excel in domain-specific, transparent, and multilingual reasoning.

GRPO with edits:

1. Removed KL Divergence 2. Normalize by total length (Dr. GRPO style) 3. Minibatch normalization for advantages 4. Relaxing trust region

https://arxiv.org/pdf/2506.10910

Simon Wilson: all LLM API vendors are converging to the same product:

• Code execution: Python in a sandbox
• Web search — like Anthropic, Mistral seem to use Brave
• Document library aka hosted RAG
• Image generation (FLUX for Mistral)
• Model Context Protocol