Anthropic releases Claude Opus 5.5 and OpenAI counters with two cheaper GPT-6 models

Anthropic releases Claude Opus 5.5 and OpenAI counters with two cheaper GPT-6 models

Despite rampant worries about runaway artificial intelligence, the two big AI model makers aren’t yet slowing down: Anthropic PBC released Claude Opus 5.5 today and cut its price 20%, and minutes later OpenAI Group PBC put out two new GPT-6 models, Sol and Luna, at half what their predecessors cost.

Input on Opus 5.5 costs $4 per million tokens and output $20, which Anthropic said works out…