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Qwen3.5-0.8B

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Model Details

Qwen3.5 0.8B

Quick answer: Qwen3.5 0.8B is Alibaba's September 2025 ultra-compact model scoring 50.5% C-Eval and 21.0% IFBench. Apache 2.0 — smallest in the Qwen3.5 family.

What Qwen3.5 0.8B Is

Qwen3.5 0.8B is the smallest model in Alibaba's September 2025 Qwen3.5 generation. At 0.8B parameters, it targets extreme edge deployment — smartphones, IoT, and embedded systems.

Specifications

FieldValue
OrganizationAlibaba
LicenseApache 2.0
HuggingFaceQwen/Qwen3.5-0.8B
Release dateSeptember 2025
Parameters0.8B
ModalityText only

Public Benchmark Scores

BenchmarkScoreSourceDate
C-Eval50.5%Benchgen evaluation2025-09
IFBench21.0%Benchgen evaluation2025-09

Pricing

Open weights under Apache 2.0 — self-host at no cost.

Qwen3.5 0.8B vs Alternatives

ModelC-EvalIFBenchLicenseParams
Qwen3.5 0.8B50.5%21.0%Apache 2.00.8B
Qwen3.5 2B—41.3%Apache 2.02B
Qwen3.5 4B—59.2%Apache 2.04B

Qwen3.5 0.8B vs 2B: IFBench 21.0% vs 41.3%. Choose 2B or 4B for better instruction quality; 0.8B only when extreme compactness is required.

Frequently Asked Questions

What is Qwen3.5 0.8B? Alibaba's September 2025 0.8B Apache 2.0 model scoring 50.5% C-Eval, 21.0% IFBench. Smallest in the Qwen3.5 family — for extreme edge/IoT.

Specs from Alibaba's Qwen3.5 0.8B release (September 2025) and Benchgen evaluations. Last updated 2026-07-24.

Benchmark Leaderboards

This model isn’t on any benchmark leaderboard yet.