Yi-1.5-9B-Chat

01-ai

Parameters

8.8B

Downloads

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Likes

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Avg score

29.5

6 benchmarks

Weights

Open

Released

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About

Yi-1.5-9B-Chat is a 8.8B-parameter open-weights model in the Yi family from 01-ai. Benchmarked on 6 evals, averaging 29.5.

apache-2.0

Benchmark scores · 6

avg 29.5 — higher is better

IFEvalOpen LLM LB · 2026-05

60.5

BIG-Bench HardOpen LLM LB · 2026-05

37.0

MMLU-ProOpen LLM LB · 2026-05

33.1

MATH Lvl 5Open LLM LB · 2026-05

22.6

MuSROpen LLM LB · 2026-05

12.8

GPQA DiamondOpen LLM LB · 2026-05

11.3

Details

Publisher01-ai

FamilyYi

Parameters8.8B

Licenseapache-2.0

WeightsOpen

Released—

History

Capability over time

Append-only ledger — every observed change to this model's numbers.