LLM Countdowns / Anthropic

Lab

Anthropic

Next expected: Claude Fable 5.5, around Nov 5, 2026.

Current flagship: Claude Opus 5.5, 57.6 on the Intelligence Index, released Sep 22, 2026 ()

Upcoming from Anthropic

November 2026

1. Nov 5 Claude Fable 5.5

December 2026

1. Dec 8 Claude Opus 5.6
2. Dec 15 Claude Sonnet 5.6

Other labs

• Anthropic
• OpenAI
• Google DeepMind
• xAI
• Meta
• DeepSeek
• Alibaba
• Mistral AI
• Moonshot / Kimi
• Xiaomi
• MiniMax
• Z.ai