Mistral Small 4: One Open-Source Model That Replaces Three (March 2026)

May 2 · 9 min read · On March 16, 2026, Mistral AI released what might be the most significant open-source AI model of the year. Mistral Small 4 is not just another incremental update — it is a complete rethinking of what a single model can do. While other labs push tril...