Simon Willison·· 2026-09-23
Claude Opus 5.5, GPT-6 Sol, GPT-6 Luna, and a new price war
Claude Opus 5.5, GPT-6 Sol, GPT-6 Luna, and a new price war
AI summary
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.
Selection record
Threshold 76Media and individualsFirst 88Second 82
AdmittedSum of both 170 ≥ twice the threshold 152
- Source tier
- Media and individuals; this tier's threshold is 76
- Pre-filter
- passed：评测Claude/GPT新模型及价格战
- Why it was chosen
- Places the three models released on the same day alongside their pricing, showing how the latest cuts affect competition across model tiers.
A model scores each item twice, independently, against one written standard, out of 100. An item is admitted only when the two scores add up to twice the threshold. The threshold is set per source tier.
Source: Simon Willison · simonwillison.net