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My effective cost per million tokens: Sonnet 5 $0.26, Fable 5.1 $0.69, Opus 5 $0.72. Has anyone measured the same for OpenAI models?

This story is from 2026-09-10. It is preserved in the archive; the latest stories are on the live feed.

I build LLM gateway infrastructure, so treat this as interested. The numbers are from my own coding traffic, not a benchmark I designed. I route my own Claude Code through a gateway I wrote that records every request: model, tokens in and out, cache reads and writes, and what each call actually cos…

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  1. 2026-09-10 21:44 · r/ChatGPTCoding
    My effective cost per million tokens: Sonnet 5 $0.26, Fable 5.1 $0.69, Opus 5 $0.72. Has anyone measured the same for OpenAI models?

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