OpenAI cut GPT-5.6 Luna's price by 80%, and Anthropic's Opus 5.5 costs 20% less than Opus 5
OpenAI cut the price of GPT-5.6 Luna by 80% and GPT-5.6 Terra by 20%, roughly three weeks after the models launched. Anthropic priced Claude Opus 5.5 at $4 per million input tokens and $20 per million output tokens, 20% less than Opus 5.
A post on the cuts has 323 upvotes on Hacker News, up from 26 in 12 hours - about 11 times the typical pace of other stories SteadyVane tracks on Hacker News. It has 316 comments, about 13 hours after it was submitted.
Why it matters: Luna is now $0.20 per million input tokens and $1.20 per million output tokens, down from $1 and $6. If an AI feature was shelved over API cost, the numbers are worth redoing. OpenAI attributes the cuts to efficiency gains; Anthropic says Opus 5.5 costs about 40% less than Opus 5 on typical workloads at default settings.