Atomo moves to the latest AI models

Atomo now runs on Claude Sonnet 5.5 and Claude Opus 5.5 across chat, enrichment and batch work, for sharper answers and better reasoning on long tasks. The OpenAI and Gemini options are refreshed too, with GPT-6 Sol and GPT-6 Luna, Gemini 3.8 Flash for heavier work, Gemini 3.5 Flash-Lite for quick tasks and Gemini 3.1 Flash Image for images.