OpenAI and Anthropic cut their LLM prices by up to 80% within a few months. Why?
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Analysis of dramatic LLM price cuts by OpenAI and Anthropic, directly relevant to AI cost and infrastructure decisions.
Summary
Let’s look at a quick timeline of the major LLM model announcements from both OpenAI and Anthropic over the past few months. All pricing numbers provided are input MTok / output MTok / cache read MTok . June 26, 2026 # OpenAI announced GPT-5.6 Sol and Luna. Sol is the direct successor to GPT 5.5 at the same price of $5 / $30 / $0.50 , while Luna is a small model specifically designed for cheaper use cases at $1 / $6 / $0.10 . They also announced a Terra model that’s in between those two models, but few cared about it.