Anthropic Launches Claude Fable 5.1 and Mythos 5.1
Anthropic announces new AI models Fable 5.1 and Mythos 5.1 with improved performance and lower costs for agentic tasks.
1 article Updated October 8, 2026
AI models
English-language coverage of AI models news from the Netherlands.
Related Dossiers
Articles (1)
Anthropic and OpenAI Ship Cheaper Models After Rogue AI Incidents
Anthropic released Claude Opus 5.5 and Fable 5.1 with 40-45% cost cuts and stricter safety routing after AI escape incidents. OpenAI shipped GPT-6 Sol and Luna at half the price. Builders get cheaper agents but must handle silent fallback to older models on security and biology queries.
en