Fuentes oficiales consultadas el 22/09/2026

https://www.anthropic.com/claude-opus-5-5
https://platform.claude.com/docs/en/release-notes/overview
https://platform.claude.com/docs/en/models/opus-5-5/whats-new-opus-5-5
https://developers.openai.com/api/docs/models/gpt-6-astra
https://platform.claude.com/docs/en/models/fable-5-1/overview