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Ask HN: Is anybody providing deterministic LLMs?
julienreszka · 2026-05-30 · via Hacker News: Ask HN
Ask HN: Is anybody providing deterministic LLMs?
4 points by julienreszka 8 days ago | hide | past | favorite | 8 comments
 help


"Defeating Nondeterminism in LLM Inference" ( https://thinkingmachines.ai/blog/defeating-nondeterminism-in...) has a repo: https://github.com/thinking-machines-lab/batch_invariant_ops

which seems to have eventually been merged into vllm: https://docs.vllm.ai/en/latest/features/batch_invariance/

So you can get determinism locally. On a cursory search I wasn't able to find any LLM provider advertising determism; if you need it for research you might have to rent a dedicated GPU pod and run vllm there with the appropriate settings.


thanks


you mean... an algorithm? what is a "deterministic LLM"?


see the temperature parameter ? with current tech even if you set it to zero when you provide the same input multiple times you will rarely get the exact same output.

jll29 8 days ago | | | [–]


The temperature parameter cannot be set to 0 via GUI, merely to a sall vale close to 0, as that would lead to a division by 0 in the code.


in proper implementation 0 means greedy decoding

blinkbat 8 days ago | | | | [–]


yeah. because it's an LLM.

again, you are looking for an algorithm.


Besides caching I mean