Must-readSimon WillisonSep 22, 2026
Price war intensifies between Claude Opus 5.5 and GPT-6
Recently, Claude Opus 5.5 and GPT-6 Sol/Luna were announced simultaneously, triggering major moves in enterprise pricing strategies. New plans and licensing changes affect enterprise adoption costs and choices. Developers can benefit from evaluating the latest features early.
Why it mattersPrice trends and feature differences between major models influence deployment decisions.
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