Qwen3.5 9B Base
Summary
Qwen3.5 9B Base is an open-weight language model from Alibaba (Qwen), released on 26 Feb 2026. It accepts text and generates text, with a 66K-token context window and up to 66K output tokens per response.
Pre-trained Qwen3.5 base checkpoint for fine-tuning and research, without instruction tuning
Last verified 21 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | Alibaba (Qwen) |
|---|---|
| Release date | 26 Feb 2026 [models.dev] |
| Status | Generally available [models.dev] |
| Weights | Open weights [models.dev] |
| Context window | 66K (65,536 tokens) [models.dev] |
| Max output | 66K tokens [models.dev] |
| Input | Text [models.dev] |
| Output | Text [models.dev] |
| Reasoning mode | No [models.dev] |
| Tool calling | No [models.dev] |
Qwen3.5 9B Base API pricing by provider
USD per million tokens. Sorted by input price.
We do not currently track a paid API listing for this model.
Frequently asked questions
What is the context window of Qwen3.5 9B Base?
Qwen3.5 9B Base has a context window of 65,536 tokens (66K) and can generate up to 65,536 tokens in a single response, according to models.dev.
Is Qwen3.5 9B Base open source?
Qwen3.5 9B Base is an open-weight model. Check the license terms before commercial use.
When was Qwen3.5 9B Base released?
Alibaba (Qwen) released Qwen3.5 9B Base on 26 Feb 2026, according to models.dev.
Change history
- Added to the directory