Anthropic and OpenAI cut prices 90 minutes apart
TL;DR Nobody launched a smarter model that afternoon. Everyone launched a cheaper one.
On 22 September, Anthropic shipped Claude Opus 5.5 at $4/$20 per million tokens, 20% under Opus 5. Ninety minutes later, OpenAI released GPT-6 Sol and Luna at roughly half the price of the 5.6 versions.
Nobody launched a smarter model that afternoon. Everyone launched a cheaper one. Both say the savings come from inference and caching efficiency, not smaller models. The price war has started, and for anyone building on AI, that's great news.
Try this
Re-check your model choice every quarter. Last quarter's sensible default may now cost double.
