Model Comparison

Qwen3.5-397B-A17B vs Seed 2.0 ProWhich is better in 2026?

Seed 2.0 Pro significantly outperforms across most benchmarks.

Verdict: Qwen3.5-397B-A17B vs Seed 2.0 Pro — which is better?

Qwen3.5-397B-A17B (by Alibaba Cloud / Qwen Team) and Seed 2.0 Pro (by ByteDance) 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.

Qwen3.5-397B-A17B outperforms in 0 benchmarks, while Seed 2.0 Pro is better at 5 benchmarks (AIME 2026, BrowseComp, GPQA, LiveCodeBench v6, SWE-Bench Verified). Seed 2.0 Pro significantly outperforms across most benchmarks.

Choose Qwen3.5-397B-A17B if…

  • you want the most recent training data — it shipped Feb 2026
  • you need open weights you can self-host or fine-tune

Choose Seed 2.0 Pro if…

  • you want the strongest raw capability — it leads on 5 of 5 shared benchmarks
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Performance Benchmarks

Comparative analysis across standard metrics

5 benchmarks

Qwen3.5-397B-A17B outperforms in 0 benchmarks, while Seed 2.0 Pro is better at 5 benchmarks (AIME 2026, BrowseComp, GPQA, LiveCodeBench v6, SWE-Bench Verified).

Seed 2.0 Pro significantly outperforms across most benchmarks.

Mon Jun 15 2026 • llm-stats.com

Arena Performance

Human preference votes

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).

Alibaba Cloud / Qwen Team
Qwen3.5-397B-A17B
Input262,144 tokens
Output64,000 tokens
ByteDance
Seed 2.0 Pro
Input- tokens
Output- tokens
Mon Jun 15 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Qwen3.5-397B-A17B and Seed 2.0 Pro support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Qwen3.5-397B-A17B

Text
Images
Audio
Video

Seed 2.0 Pro

Text
Images
Audio
Video

License

Usage and distribution terms

Qwen3.5-397B-A17B is licensed under Apache 2.0, while Seed 2.0 Pro uses a proprietary license.

License differences may affect how you can use these models in commercial or open-source projects.

Qwen3.5-397B-A17B

Apache 2.0

Open weights

Seed 2.0 Pro

Proprietary

Closed source

Release Timeline

When each model was launched

Qwen3.5-397B-A17B was released on 2026-02-16, while Seed 2.0 Pro was released on 2026-02-14.

Qwen3.5-397B-A17B is 0 month newer than Seed 2.0 Pro.

Qwen3.5-397B-A17B

Feb 16, 2026

3 months ago

2d newer
Seed 2.0 Pro

Feb 14, 2026

4 months ago

Knowledge Cutoff

When training data ends

Seed 2.0 Pro has a documented knowledge cutoff of 2024-01-01, while Qwen3.5-397B-A17B's cutoff date is not specified.

We can confirm Seed 2.0 Pro's training data extends to 2024-01-01, but cannot make a direct comparison without Qwen3.5-397B-A17B's cutoff date.

Qwen3.5-397B-A17B

—

Seed 2.0 Pro

Jan 2024

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Alibaba Cloud / Qwen Team

Qwen3.5-397B-A17B

View details

Alibaba Cloud / Qwen Team

Larger context window (262,144 tokens)
Has open weights
ByteDance
Higher AIME 2026 score (94.2% vs 91.3%)
Higher BrowseComp score (77.3% vs 69.0%)
Higher GPQA score (88.9% vs 88.4%)
Higher LiveCodeBench v6 score (87.8% vs 83.6%)
Higher SWE-Bench Verified score (76.5% vs 76.4%)

Detailed Comparison

AI Model Comparison Table
Feature
Alibaba Cloud / Qwen Team
Qwen3.5-397B-A17B
ByteDance
Seed 2.0 Pro

FAQ

Common questions about Qwen3.5-397B-A17B vs Seed 2.0 Pro.

Which is better, Qwen3.5-397B-A17B or Seed 2.0 Pro?

Seed 2.0 Pro significantly outperforms across most benchmarks. Qwen3.5-397B-A17B is made by Alibaba Cloud / Qwen Team and Seed 2.0 Pro is made by ByteDance. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Qwen3.5-397B-A17B compare to Seed 2.0 Pro in benchmarks?

Qwen3.5-397B-A17B scores MMLU-Redux: 94.9%, HMMT 2025: 94.8%, C-Eval: 93.0%, HMMT25: 92.7%, IFEval: 92.6%. Seed 2.0 Pro scores AIME 2025: 98.3%, AIME 2026: 94.2%, GPQA: 88.9%, LiveCodeBench v6: 87.8%, BrowseComp: 77.3%.

What are the context window sizes for Qwen3.5-397B-A17B and Seed 2.0 Pro?

Qwen3.5-397B-A17B supports 262K tokens and Seed 2.0 Pro supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Qwen3.5-397B-A17B and Seed 2.0 Pro?

Key differences include licensing (Apache 2.0 vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes Qwen3.5-397B-A17B and Seed 2.0 Pro?

Qwen3.5-397B-A17B is developed by Alibaba Cloud / Qwen Team and Seed 2.0 Pro is developed by ByteDance.

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