Qwen3.5-4B | Epoch AI

ECI

N/A

Alibaba

Feb. 24, 2026

Open weights

Qwen3.5-4B is an open-weights model from Alibaba, released February 24, 2026.

Input price—

Output price—

Parameters4.0e9

Training computeUnknown

Qwen3.5-4B vs select alternatives

Domain	Benchmark	Qwen3.5-4B Alibaba Feb. 24, 2026 Open weights	GPT-5.3 Codex OpenAI Feb. 5, 2026 Closed weights	Claude Opus 4.6 Anthropic Feb. 5, 2026 Closed weights	Gemini 3.1 Pro Google DeepMind Feb. 19, 2026 Closed weights
Mathematics	OTIS Mock AIME 2024-2025Best score 100.0%	55.8%	n/a	94.4%	95.6%

Model metadata

General
Organization	Alibaba
Release date	Feb. 24, 2026
Model accessibility	Open weights
Country	China
Knowledge cutoff	Unknown
Provider notes	Qwen3.5: Towards Native Multimodal Agents

Pricing
Input price	—
Output price	—

Training
Parameters	4.0e9
Training compute	Unknown
Training hardware	Unknown
Training time	Unknown
Training dataset size	Unknown