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Mercury 3 vs GPT-6 Luna vs Claude Haiku 5.5: Can Diffusion Models Finally Outrun Transformers for Agent Work?

This story is from 2026-10-20. It is preserved in the archive; the latest stories are on the live feed.

Diffusion language models just stopped being a research curiosity. On October 19, 2026, the Redwood City startup Inception launched Mercury 3 — a model that writes in parallel instead of one token at a time — and claims it hits 1,068 tokens per second while matching or beating GPT-6 Luna and Claude…

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  1. 2026-10-20 17:40 · DEV Community — AI
    Mercury 3 vs GPT-6 Luna vs Claude Haiku 5.5: Can Diffusion Models Finally Outrun Transformers for Agent Work?

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