Model Comparison
Qwen3.5-397B-A17B vs U2Which is better in 2026?
Comparing Qwen3.5-397B-A17B and U2 across benchmarks, pricing, and capabilities.
Verdict: Qwen3.5-397B-A17B vs U2 — which is better?
Qwen3.5-397B-A17B (by Alibaba Cloud / Qwen Team) and U2 (by Unisound) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.
On price, U2 is roughly 7.2x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Choose Qwen3.5-397B-A17B if…
- you need open weights you can self-host or fine-tune
Choose U2 if…
- cost matters — it's about 7.2x cheaper per token
- you want the most recent training data — it shipped Jun 2026
Performance Benchmarks
Comparative analysis across standard metrics
Qwen3.5-397B-A17B and U2 don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, Qwen3.5-397B-A17B ($0.60/1M tokens) is 4.0x more expensive than U2 ($0.15/1M tokens).
For output processing, Qwen3.5-397B-A17B ($3.60/1M tokens) is 12.0x more expensive than U2 ($0.30/1M tokens).
In conclusion, Qwen3.5-397B-A17B is more expensive than U2.*
* Using a 3:1 ratio of input to output tokens
Model Size
Parameter count comparison
Qwen3.5-397B-A17B has 131.0B more parameters than U2, making it 49.2% larger.
Context Window
Maximum input and output token capacity
Only Qwen3.5-397B-A17B specifies input context (262,144 tokens). Only Qwen3.5-397B-A17B specifies output context (64,000 tokens).
Input Capabilities
Supported data types and modalities
Qwen3.5-397B-A17B supports multimodal inputs, whereas U2 does not.
Qwen3.5-397B-A17B can handle both text and other forms of data like images, making it suitable for multimodal applications.
Qwen3.5-397B-A17B
U2
License
Usage and distribution terms
Qwen3.5-397B-A17B is licensed under Apache 2.0, while U2 uses a proprietary license.
License differences may affect how you can use these models in commercial or open-source projects.
Apache 2.0
Open weights
Proprietary
Closed source
Release Timeline
When each model was launched
Qwen3.5-397B-A17B was released on 2026-02-16, while U2 was released on 2026-06-05.
U2 is 4 months newer than Qwen3.5-397B-A17B.
Feb 16, 2026
3 months ago
Jun 5, 2026
4 days ago
3mo newerKnowledge Cutoff
When training data ends
U2 has a documented knowledge cutoff of 2026-01-31, while Qwen3.5-397B-A17B's cutoff date is not specified.
We can confirm U2's training data extends to 2026-01-31, but cannot make a direct comparison without Qwen3.5-397B-A17B's cutoff date.
—
Jan 2026
Provider Availability
Qwen3.5-397B-A17B is available from Novita. U2 is available from Unisound.
Qwen3.5-397B-A17B
U2
Outputs Comparison
Key Takeaways
Qwen3.5-397B-A17B
View detailsAlibaba Cloud / Qwen Team
U2
View detailsUnisound
Detailed Comparison
| Feature | | |
|---|
FAQ
Common questions about Qwen3.5-397B-A17B vs U2.