Sources & verification notes
Qwen3.5-4B
Qwen/Qwen3.5-4BExact identifier & access
Identity and lifecycle apply to this exact identifier and serving surface.
- Qwen/Qwen3.5-4B model card (Hugging Face) ↗Qwen · provider-authored · checked Oct 1, 2026
First availability
Effective Mar 2, 2026. Checked Oct 1, 2026.
README news: "2026-03-02: Qwen3.5-9B, Qwen3.5-4B, Qwen3.5-2B, and Qwen3.5-0.8B are now available".
- QwenLM/Qwen3.8 README (news) ↗Qwen · provider-authored · checked Oct 1, 2026
Availability status
Effective date not established; this is an observation. Checked Oct 1, 2026.
Repository is listed in the Qwen organization on Hugging Face and the card was readable on the observation date.
- Qwen/Qwen3.5-4B model card (Hugging Face) ↗Qwen · provider-authored · checked Oct 1, 2026
Capabilities & limits
Effective date not established; this is an observation. Checked Oct 1, 2026.
Image input follows the Hugging Face pipeline tag and the card type; tool and structured-output support were not verified. Context from the "Context Length" line of the model card ("Context Length: 262,144 natively and extensible up to 1,010,000 tokens."). Review 2026-10-01: Tools: the card's Agentic Usage section says "Qwen3.5 excels in tool calling capabilities." No structured-output support documented. The card recommends an output length of 32,768 tokens for most queries; that is a usage recommendation, not a stated maximum, so maxOutput is recorded as not published.
- Qwen/Qwen3.5-4B model card (Hugging Face) ↗Qwen · provider-authored · checked Oct 1, 2026
Input price
Effective date not established; this is an observation. Checked Oct 1, 2026.
Downloadable weights.
- Qwen/Qwen3.5-4B model card (Hugging Face) ↗Qwen · provider-authored · checked Oct 1, 2026
Output price
Effective date not established; this is an observation. Checked Oct 1, 2026.
Downloadable weights.
- Qwen/Qwen3.5-4B model card (Hugging Face) ↗Qwen · provider-authored · checked Oct 1, 2026
Model card
Effective date not established; this is an observation. Checked Oct 1, 2026.
Parameter and architecture fields are copied from the model card text; fields the card does not state are left empty.
- Qwen/Qwen3.5-4B model card (Hugging Face) ↗Qwen · provider-authored · checked Oct 1, 2026
Provider description
Effective date not established; this is an observation. Checked Oct 1, 2026.
- Qwen/Qwen3.5-4B model card (Hugging Face) ↗Qwen · provider-authored · checked Oct 1, 2026
License
Effective date not established; this is an observation. Checked Oct 1, 2026.
- Qwen/Qwen3.5-4B model card (Hugging Face) ↗Qwen · provider-authored · checked Oct 1, 2026