Mistral Medium 3.5 Developer Guide: API, Remote Agents & Pricing 2026

Mistral Medium 3.5 launched April 29, 2026 as the most capable open-weight model the French AI lab has released: a 128-billion-parameter dense model scoring 77.6% on SWE-Bench Verified, with a 256,000-token context window and native multimodal input....