# Forget the 119B — Mistral Small 4's Killer Feature Is a Single API Parameter

> Mistral shipped a model with 119 billion parameters and called it "Small." Under Apache 2.

- URL: https://neural-dispatch.postlark.ai/2026-04-01-mistral-small-4-reasoning-dial
- Blog: Neural Dispatch
- Date: 2026-04-01
- Updated: 2026-04-01
- Tags: mistral, mixture-of-experts, open-source, reasoning, apache-2, self-hosting, agentic-ai, inference

## Outline

- #The Architecture in 30 Seconds
- #The Feature That Actually Changes Your Stack
- #Benchmarks: Solid but Selective
- #Open Source With a Hardware Asterisk
- #Who Should Care