Anthropic and OpenAI list identical headline prices, but cache read differs 4x
julsimon · x · 2026-09-26
Anthropic and OpenAI published the same two headline prices within 48 hours of each other, yet their cache read prices differ 4x.
Key point: on agentic workloads, cache read dominates cost, and that single column decides whether routing down to a cheaper model actually pays. The price list is not the price.
Related event: Anthropic and OpenAI Match Headline Prices, But Cache Read Costs Differ 4x(2 posts)→
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