/news
Anthropic DROPS OPUS 5.5 + OpenAI GPT 6 SOL/LUNA
Anthropic dropped Opus 5.5 today. OpenAI answered with GPT-6 Sol and Luna minutes later at half the price. Both cut costs. Only one of them called for a slowdown eight days ago.
Sep 22, 2026World of AI

Anthropic dropped Opus 5.5 today. OpenAI answered with GPT-6 Sol and Luna minutes later at half the price. Both cut costs. Only one of them called for a slowdown eight days ago.
[Source: World of AI](https://intheworldofai.com/p/anthropic-drops-opus-5-5-openai-gpt-6-sol-luna)