Q1 2026: Densest Model Release Window in AI History
activeOrigin: Multiple labs, January–April 2026
Q1 2026 saw unprecedented model release velocity: - Claude Opus 4.6 (Feb 5), Claude Sonnet 4.6 (Feb 17) - GPT-5.4 (Mar 5) with three variants - Gemini 3.1 Ultra (Mar 2026, 94.3% on GPQA Diamond) - Grok 4.20 (current xAI flagship) - Multiple smaller models across Mistral, Cohere, others Every 2-3 weeks, a new 'best model' headline.
Usage
Use when discussing model release pace. 'The densest model release window ever' is the frame. Useful for context when discussing model comparisons — they age in weeks, not months.
Shelf life: Canonical for Q1 2026; will be superseded by future release cycles