TL;DR: Mistral Medium 3.5 is a 128B open-weight model released April 29, 2026, with a 256K context window, configurable reasoning, and native multimodal input. It scores 77.6% on SWE-Bench Verified — close but not ahead of Claude Sonnet 4.6 — and ships alongside Vibe, a cloud coding agent that submits pull requests directly to GitHub without you babysitting it. API pricing is $1.50 per million inp
Everyone told me I needed Python for AI. I didn't listen. Here's what happened. Let me be real with you. Every time I say "I'm building an AI agent," people assume I'm wrist-deep in Python virtual environments, pip dependencies, and a LangChain tutorial from 2023. And when I say "in Java?" — I get the look. You know the one. So I built it anyway. A fully functional AI agent. With tool use. With R