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Run GLM-5.3 Locally: Real Quant Sizes, the llama.cpp Surprise, and the reasoning_effort Trap

This story is from 2026-09-05. It is preserved in the archive; the latest stories are on the live feed.

Z.ai published the GLM-5.3-Flash weights on 27 August 2026 at 10:33 UTC and the GLM-5.3 flagship on 28 August 2026 at 15:22 UTC . The models were on Z.ai's own API first, though I could not find a primary source that dates that launch, so I am not going to put a day on it. I spent the evening readi…

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  1. 2026-09-05 16:25 · DEV Community — AI
    Run GLM-5.3 Locally: Real Quant Sizes, the llama.cpp Surprise, and the reasoning_effort Trap

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