# Sonnet 5.5 and GPT-6.1 Sol

Pick any model. Sonnet 5.5 replaces Sonnet 5, and GPT-6.1 Sol is now the default on paid plans; Luna stays the free one. Change it from the model picker in any chat.

URL: https://autron.ai/updates/sonnet-5-5-gpt-6-1  
Updated: 2026-09-29  
By: Autron

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