Anthropic and OpenAI roll out cheaper models in first release since call for slowdown

Summary

OpenAI added GPT-6 Sol and GPT-6 Luna to its GPT-6 family and cut API prices by 50% compared with GPT-5.6 promotional pricing. Anthropic released Claude Opus 5.5, which it says costs about 40% less to run than Opus 5. The releases come as both labs face pressure from cheaper open-weight models.

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