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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 DROPS OPUS 5.5 + OpenAI GPT 6 SOL/LUNA (demo placeholder)
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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)