Claude Opus 5.5, GPT-6 Sol, GPT-6 Luna, and a new price war

T2Covered by 1 source · first reported by Simon Willison's Weblog at 22 Sept, 23:46 UTC

Yesterday was Grok 4.7 (pelicans) and MiMo v2.6 Flash/Pro (more pelicans). Today Anthropic released Claude Opus 5.5, and around an hour later OpenAI released GPT-6 Sol and GPT-6 Luna. It's going to take a while to get a good read on all of these new models, but here are my impressions so far. GPT-6…