Model Comparison

Seed 2.1 Pro vs MiMo-V2.5-ProWhich is better in 2026?

Seed 2.1 Pro significantly outperforms across most benchmarks.

Verdict: Seed 2.1 Pro vs MiMo-V2.5-Pro — which is better?

Seed 2.1 Pro (by ByteDance) and MiMo-V2.5-Pro (by Xiaomi) 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.

Seed 2.1 Pro outperforms in 3 benchmarks (Humanity's Last Exam, SWE-Bench Pro, WildClawBench), while MiMo-V2.5-Pro is better at 0 benchmarks. Seed 2.1 Pro significantly outperforms across most benchmarks.

Choose Seed 2.1 Pro if…

  • you want the strongest raw capability — it leads on 3 of 3 shared benchmarks
  • you want the most recent training data — it shipped Jun 2026

Choose MiMo-V2.5-Pro if…

  • you need open weights you can self-host or fine-tune

Performance Benchmarks

Comparative analysis across standard metrics

3 benchmarks

Seed 2.1 Pro outperforms in 3 benchmarks (Humanity's Last Exam, SWE-Bench Pro, WildClawBench), while MiMo-V2.5-Pro is better at 0 benchmarks.

Seed 2.1 Pro significantly outperforms across most benchmarks.

Fri Jul 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only MiMo-V2.5-Pro specifies input context (1,048,576 tokens). Only MiMo-V2.5-Pro specifies output context (131,072 tokens).

ByteDance
Seed 2.1 Pro
Input- tokens
Output- tokens
Xiaomi
MiMo-V2.5-Pro
Input1,048,576 tokens
Output131,072 tokens
Fri Jul 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Seed 2.1 Pro supports multimodal inputs, whereas MiMo-V2.5-Pro does not.

Seed 2.1 Pro can handle both text and other forms of data like images, making it suitable for multimodal applications.

Seed 2.1 Pro

Text
Images
Audio
Video

MiMo-V2.5-Pro

Text
Images
Audio
Video

License

Usage and distribution terms

Seed 2.1 Pro is licensed under a proprietary license, while MiMo-V2.5-Pro uses MIT.

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

Seed 2.1 Pro

Proprietary

Closed source

MiMo-V2.5-Pro

MIT

Open weights

Release Timeline

When each model was launched

Seed 2.1 Pro was released on 2026-06-24, while MiMo-V2.5-Pro was released on 2026-04-27.

Seed 2.1 Pro is 2 months newer than MiMo-V2.5-Pro.

Seed 2.1 Pro

Jun 24, 2026

3 weeks ago

1mo newer
MiMo-V2.5-Pro

Apr 27, 2026

2 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

ByteDance
Supports multimodal inputs
Higher Humanity's Last Exam score (55.7% vs 34.0%)
Higher SWE-Bench Pro score (57.5% vs 57.2%)
Higher WildClawBench score (61.7% vs 43.0%)
Xiaomi
Larger context window (1,048,576 tokens)
Has open weights

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Seed 2.1 Pro and MiMo-V2.5-Pro side-by-side, then vote on the output you prefer.

Seed 2.1 Pro
✓ Preferred
MiMo-V2.5-Pro
Open in Playground
AI Model Comparison Table
Feature
ByteDance
Seed 2.1 Pro
Xiaomi
MiMo-V2.5-Pro

FAQ

Common questions about Seed 2.1 Pro vs MiMo-V2.5-Pro.

Which is better, Seed 2.1 Pro or MiMo-V2.5-Pro?

Seed 2.1 Pro significantly outperforms across most benchmarks. Seed 2.1 Pro is made by ByteDance and MiMo-V2.5-Pro is made by Xiaomi. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Seed 2.1 Pro compare to MiMo-V2.5-Pro in benchmarks?

Seed 2.1 Pro scores CharXiv-D: 95.5%, MathVision: 94.5%, MathVista: 90.7%, MathVerse: 89.7%, Video-MME: 89.2%. MiMo-V2.5-Pro scores FrontierSWE (Impl.): 100.0%, GSM8k: 99.6%, ARC-C: 97.2%, MMLU-Redux: 92.8%, C-Eval: 91.5%.

What are the context window sizes for Seed 2.1 Pro and MiMo-V2.5-Pro?

Seed 2.1 Pro supports an unknown number of tokens and MiMo-V2.5-Pro supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Seed 2.1 Pro and MiMo-V2.5-Pro?

Key differences include multimodal support (yes vs no), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes Seed 2.1 Pro and MiMo-V2.5-Pro?

Seed 2.1 Pro is developed by ByteDance and MiMo-V2.5-Pro is developed by Xiaomi.

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