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Model Comparison

Qwen3.8 Max vs Seed 2.1 ProWhich is better in 2026?

Qwen3.8 Max significantly outperforms across most benchmarks.

Verdict: Qwen3.8 Max vs Seed 2.1 Pro — which is better?

Qwen3.8 Max (by Alibaba Cloud / Qwen Team) and Seed 2.1 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.

Qwen3.8 Max outperforms in 7 benchmarks (ERQA, LVBench, MobileWorld, NL2Repo, RealWorldQA, SWE-Bench Pro, Terminal-Bench 2.1), while Seed 2.1 Pro is better at 2 benchmarks (Humanity's Last Exam, MMMU-Pro). Qwen3.8 Max significantly outperforms across most benchmarks.

Choose Qwen3.8 Max if…

  • you want the strongest raw capability — it leads on 7 of 9 shared benchmarks
  • you want the most recent training data — it shipped Aug 2026

Choose Seed 2.1 Pro if…

  • you are already invested in the ByteDance ecosystem

Performance Benchmarks

Comparative analysis across standard metrics

9 benchmarks

Qwen3.8 Max outperforms in 7 benchmarks (ERQA, LVBench, MobileWorld, NL2Repo, RealWorldQA, SWE-Bench Pro, Terminal-Bench 2.1), while Seed 2.1 Pro is better at 2 benchmarks (Humanity's Last Exam, MMMU-Pro).

Qwen3.8 Max significantly outperforms across most benchmarks.

Fri Aug 07 2026 • llm-stats.com

Arena Performance

Human preference votes

Input Capabilities

Supported data types and modalities

Both Qwen3.8 Max and Seed 2.1 Pro support multimodal inputs.

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

Qwen3.8 Max

Text
Images
Audio
Video

Seed 2.1 Pro

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Qwen3.8 Max

Proprietary

Closed source

Seed 2.1 Pro

Proprietary

Closed source

Release Timeline

When each model was launched

Qwen3.8 Max was released on 2026-08-02, while Seed 2.1 Pro was released on 2026-06-24.

Qwen3.8 Max is 1 month newer than Seed 2.1 Pro.

Qwen3.8 Max

Aug 2, 2026

5 days ago

1mo newer
Seed 2.1 Pro

Jun 24, 2026

1 months ago

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Alibaba Cloud / Qwen Team

Qwen3.8 Max

View details

Alibaba Cloud / Qwen Team

Higher ERQA score (77.8% vs 72.0%)
Higher LVBench score (81.8% vs 78.0%)
Higher MobileWorld score (77.8% vs 73.1%)
Higher NL2Repo score (55.9% vs 47.0%)
Higher RealWorldQA score (88.0% vs 86.7%)
Higher SWE-Bench Pro score (67.7% vs 57.5%)
Higher Terminal-Bench 2.1 score (86.6% vs 71.0%)
ByteDance
Higher Humanity's Last Exam score (55.7% vs 43.6%)
Higher MMMU-Pro score (82.7% vs 82.3%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Qwen3.8 Max and Seed 2.1 Pro side-by-side, then vote on the output you prefer.

Qwen3.8 Max
✓ Preferred
Seed 2.1 Pro
Open in Playground
AI Model Comparison Table
Feature
Alibaba Cloud / Qwen Team
Qwen3.8 Max
ByteDance
Seed 2.1 Pro

FAQ

Common questions about Qwen3.8 Max vs Seed 2.1 Pro.

Which is better, Qwen3.8 Max or Seed 2.1 Pro?

Qwen3.8 Max significantly outperforms across most benchmarks. Qwen3.8 Max is made by Alibaba Cloud / Qwen Team and Seed 2.1 Pro is made by ByteDance. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Qwen3.8 Max compare to Seed 2.1 Pro in benchmarks?

Qwen3.8 Max scores PaperBench: 93.0%, GPQA: 92.6%, VideoMME w sub.: 90.4%, RealWorldQA: 88.0%, Terminal-Bench 2.1: 86.6%. Seed 2.1 Pro scores CharXiv-D: 95.5%, MathVision: 94.5%, MathVista: 90.7%, MathVerse: 89.7%, Video-MME: 89.2%.

Who makes Qwen3.8 Max and Seed 2.1 Pro?

Qwen3.8 Max is developed by Alibaba Cloud / Qwen Team and Seed 2.1 Pro is developed by ByteDance.

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