Anthropic and OpenAI release Opus 5.5, GPT-6 Sol and Luna in a sharp price war
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Anthropic released Claude Opus 5.5, and about an hour later OpenAI released GPT-6 Sol and GPT-6 Luna. GPT-6 Luna is half the price of GPT-5.6 Luna, and GPT-6 Sol saw a similar cut; GPT-6 is half the cost of GPT-5.6’s planned November promotional pricing after a scheduled 25% increase. Grok 4.7’s $2/$6 pricing now matches GPT-6 Sol on input, and GPT-6 Luna at $0.10/$0.50 is among OpenAI’s cheapest models ever.
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