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

- GPT-6: 5 events in the last 90 days
- Previous: earlier the same day · Better prompt caching for GPT-6
What happened
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 […] The post Anthropic releases Claude Opus 5.5 and OpenAI counters with two cheaper GPT-6 mod…
Summary assembled by rule from the sources below