Model Comparison

Seed 2.1 Pro vs Muse Spark 1.1Which is better in 2026?

Muse Spark 1.1 significantly outperforms across most benchmarks.

Verdict: Seed 2.1 Pro vs Muse Spark 1.1 — which is better?

Seed 2.1 Pro (by ByteDance) and Muse Spark 1.1 (by Meta) 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 0 benchmarks, while Muse Spark 1.1 is better at 7 benchmarks (BabyVision, CharXiv-R, Humanity's Last Exam, MCP Atlas, SWE-Bench Pro, Terminal-Bench 2.1, Toolathlon). Muse Spark 1.1 significantly outperforms across most benchmarks.

Choose Seed 2.1 Pro if…

  • you are already invested in the ByteDance ecosystem

Choose Muse Spark 1.1 if…

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

Performance Benchmarks

Comparative analysis across standard metrics

7 benchmarks

Seed 2.1 Pro outperforms in 0 benchmarks, while Muse Spark 1.1 is better at 7 benchmarks (BabyVision, CharXiv-R, Humanity's Last Exam, MCP Atlas, SWE-Bench Pro, Terminal-Bench 2.1, Toolathlon).

Muse Spark 1.1 significantly outperforms across most benchmarks.

Fri Jul 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Input Capabilities

Supported data types and modalities

Both Seed 2.1 Pro and Muse Spark 1.1 support multimodal inputs.

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

Seed 2.1 Pro

Text
Images
Audio
Video

Muse Spark 1.1

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.

Seed 2.1 Pro

Proprietary

Closed source

Muse Spark 1.1

Proprietary

Closed source

Release Timeline

When each model was launched

Seed 2.1 Pro was released on 2026-06-24, while Muse Spark 1.1 was released on 2026-07-09.

Muse Spark 1.1 is 1 month newer than Seed 2.1 Pro.

Seed 2.1 Pro

Jun 24, 2026

3 weeks ago

Muse Spark 1.1

Jul 9, 2026

1 weeks ago

2w newer

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

No standout differentiators in the data we have for this pair.

Meta
Higher BabyVision score (76.3% vs 73.7%)
Higher CharXiv-R score (88.4% vs 86.4%)
Higher Humanity's Last Exam score (62.1% vs 55.7%)
Higher MCP Atlas score (88.1% vs 83.8%)
Higher SWE-Bench Pro score (61.5% vs 57.5%)
Higher Terminal-Bench 2.1 score (80.0% vs 71.0%)
Higher Toolathlon score (75.6% vs 50.6%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Seed 2.1 Pro and Muse Spark 1.1 side-by-side, then vote on the output you prefer.

Seed 2.1 Pro
✓ Preferred
Muse Spark 1.1
Open in Playground
AI Model Comparison Table
Feature
ByteDance
Seed 2.1 Pro
Meta
Muse Spark 1.1

FAQ

Common questions about Seed 2.1 Pro vs Muse Spark 1.1.

Which is better, Seed 2.1 Pro or Muse Spark 1.1?

Muse Spark 1.1 significantly outperforms across most benchmarks. Seed 2.1 Pro is made by ByteDance and Muse Spark 1.1 is made by Meta. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Seed 2.1 Pro compare to Muse Spark 1.1 in benchmarks?

Seed 2.1 Pro scores CharXiv-D: 95.5%, MathVision: 94.5%, MathVista: 90.7%, MathVerse: 89.7%, Video-MME: 89.2%. Muse Spark 1.1 scores CharXiv-R: 88.4%, MCP Atlas: 88.1%, OSWorld-Verified: 80.8%, Terminal-Bench 2.1: 80.0%, BabyVision: 76.3%.

Who makes Seed 2.1 Pro and Muse Spark 1.1?

Seed 2.1 Pro is developed by ByteDance and Muse Spark 1.1 is developed by Meta.

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