Qwen3.5 2B (Reasoning)
Intelligence
16.3
#312/523
Coding
3.5
#394/429
Math
—
Speed
—
Pricing
$0.02 / $0.10
per 1M tokens (in/out)
Qwen3.5-2B is a 2 billion parameter vision-language model using Gated DeltaNet hybrid architecture with a 3:1 ratio of linear attention to full softmax attention. It supports 262K native context length and features both thinking and non-thinking modes.
Qwen3.5 2B (Reasoning) is Alibaba’s advanced model designed for reasoning tasks. It operates with an Intelligence Index of 16.3 and is priced at $0.02 per million input tokens, targeting professional users.
When to Use Qwen3.5 2B (Reasoning)
✓ Best For
- Complex reasoning tasks
- Natural language understanding
- Data analysis and interpretation
✗ Not Ideal For
- High-speed processing needs
- Basic coding tasks
How Qwen3.5 2B (Reasoning) Compares
Intelligence Index · Higher is better
AlibabaDeepSeek
Benchmark Profile
Coding Index
Liquid AIMicrosoftAlibabaAllen Institute for AIIBM
Intelligence · Coding · Math
Intelligence
Coding
Math
All Benchmark Scores (9)
| Benchmark | Score | |
|---|---|---|
| Intelligence Index | 16.3 | |
| Coding Index | 3.5 | |
| GPQA | 456% | |
| HLE | 21% | |
| SciCode | 2.8% | |
| IFBench | 31.5% | |
| LCR | 23.7% | |
| TerminalBench Hard | 3.8% | |
| Tau2 | 69% |
Data: Artificial Analysis · Updated: April 10, 2026
Frequently Asked Questions (15)
When was Qwen3.5 2B (Reasoning) released?
Qwen3.5 2B (Reasoning) was released on March 2, 2026.
Who created Qwen3.5 2B (Reasoning)?
Qwen3.5 2B (Reasoning) was created by Alibaba.
How intelligent is Qwen3.5 2B (Reasoning)?
Qwen3.5 2B (Reasoning) scores 16 on the Artificial Analysis Intelligence Index, placing it well above average among other open weight models of similar size (median: 8).
How much does Qwen3.5 2B (Reasoning) cost?
Qwen3.5 2B (Reasoning) costs $0.02 per 1M input tokens (very competitive, median: $0.10) and $0.10 per 1M output tokens (very competitive, median: $0.10), based on the median across providers serving the model.
What is Qwen3.5 2B (Reasoning) API pricing?
Qwen3.5 2B (Reasoning) costs $0.02 per 1M input tokens and $0.10 per 1M output tokens (based on the median across providers serving the model). For a blended rate (3:1 input to output ratio), this is $0.04 per 1M tokens. Pricing may vary by provider.
How verbose is Qwen3.5 2B (Reasoning)?
When evaluated on the Intelligence Index, Qwen3.5 2B (Reasoning) generated 390M output tokens, which is at the higher end compared to other open weight models of similar size (median: 17M).
Is Qwen3.5 2B (Reasoning) a reasoning model?
Yes, Qwen3.5 2B (Reasoning) is a reasoning model. It uses extended thinking or chain-of-thought reasoning to work through complex problems before providing an answer.
What input modalities does Qwen3.5 2B (Reasoning) support?
Qwen3.5 2B (Reasoning) supports text and image input.
What output modalities does Qwen3.5 2B (Reasoning) support?
Qwen3.5 2B (Reasoning) supports text output.
Can Qwen3.5 2B (Reasoning) process images?
Yes, Qwen3.5 2B (Reasoning) supports image input and can analyze, describe, and answer questions about images.
Is Qwen3.5 2B (Reasoning) multimodal?
Yes, Qwen3.5 2B (Reasoning) is multimodal. It can process text and image input and generate text output.
What is the context window of Qwen3.5 2B (Reasoning)?
Qwen3.5 2B (Reasoning) has a context window of 260k tokens. This determines how much text and conversation history the model can process in a single request.
Is Qwen3.5 2B (Reasoning) open source?
Yes, Qwen3.5 2B (Reasoning) is open weights. The model weights are publicly available and can be downloaded for self-hosting.
How many parameters does Qwen3.5 2B (Reasoning) have?
Qwen3.5 2B (Reasoning) has 2.27 billion parameters.
What is the license for Qwen3.5 2B (Reasoning)?
Qwen3.5 2B (Reasoning) is released under the Apache 2.0 license. This license allows commercial use.
