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

Summary

Anthropic released Claude Opus 5.5 and OpenAI released GPT-6 Sol and GPT-6 Luna on the same day, with OpenAI's models arriving about an hour after Anthropic's. The new models carry lower per-token prices, with GPT-6 Luna at $0.10 input and $0.50 output per million tokens, and Opus 5.5 cut to $4 input and $20 output per million tokens.

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