Major Release Alibaba · Released
Qwen3.5 4B
What is Qwen3.5 4B?
Qwen3.5 4B is a Major Release AI model from Alibaba, released on March 2, 2026. It has a 262K tokens context window, costs $0.03 per million input tokens, and scores 92.1% on TAU2-bench. It is available as open source.
Alibaba Qwen3.5 4B — AA Intelligence Index 27.1, 262K tokens context, reasoning model.
How much does Qwen3.5 4B cost?
| Metric | Price |
|---|---|
| input per mtok | $0.03 |
| output per mtok | $0.15 |
Pricing data verified .
What context window does Qwen3.5 4B have?
- Context window
- 262K tokens
- Max output
- 81K
- Input modalities
- text, image, video
- Output modalities
- text
How does Qwen3.5 4B score on benchmarks?
| Benchmark | Score |
|---|---|
| GPQA Diamond | 77.1% |
| HLE | 7.8% |
| SciCode | 16.1% |
| TAU2-bench | 92.1% |
| TerminalBench-Hard | 18.2% |
| IF-Bench | 52.0% |
| LiveCodeBench Reasoning | 55.7% |
| AA Intelligence Index | 27.1 |
Benchmark scores verified .