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

Simon WillisonImportantConfirmed

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

Significant price reductions across frontier models (GPT-6 Luna at 50% of GPT-5.6, Claude Opus 5.5 at 20% reduction) directly impact cost-of-deployment economics for LLM-based applications and force vendor evaluation cycles for organizations with existing API commitments.

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CoFabrix summarises and comments on this story. The original reporting belongs to Simon Willison.

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