Model Comparison

Muse Spark vs GLM-5.1Which is better in 2026?

GLM-5.1 has a slight edge in benchmark performance.

Verdict: Muse Spark vs GLM-5.1 — which is better?

Muse Spark (by Meta) and GLM-5.1 (by Zhipu AI) 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.

Muse Spark outperforms in 2 benchmarks (GPQA, Humanity's Last Exam), while GLM-5.1 is better at 3 benchmarks (GDPval-AA, SWE-Bench Pro, Terminal-Bench 2.0). GLM-5.1 has a slight edge in benchmark performance.

Choose Muse Spark if…

  • you want the most recent training data — it shipped Apr 2026

Choose GLM-5.1 if…

  • you want the strongest raw capability — it leads on 3 of 5 shared benchmarks
  • you need open weights you can self-host or fine-tune

Performance Benchmarks

Comparative analysis across standard metrics

5 benchmarks

Muse Spark outperforms in 2 benchmarks (GPQA, Humanity's Last Exam), while GLM-5.1 is better at 3 benchmarks (GDPval-AA, SWE-Bench Pro, Terminal-Bench 2.0).

GLM-5.1 has a slight edge in benchmark performance.

Fri Jul 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only GLM-5.1 specifies input context (200,000 tokens). Only GLM-5.1 specifies output context (128,000 tokens).

Meta
Muse Spark
Input- tokens
Output- tokens
Zhipu AI
GLM-5.1
Input200,000 tokens
Output128,000 tokens
Fri Jul 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Muse Spark supports multimodal inputs, whereas GLM-5.1 does not.

Muse Spark can handle both text and other forms of data like images, making it suitable for multimodal applications.

Muse Spark

Text
Images
Audio
Video

GLM-5.1

Text
Images
Audio
Video

License

Usage and distribution terms

Muse Spark is licensed under a proprietary license, while GLM-5.1 uses MIT.

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

Muse Spark

Proprietary

Closed source

GLM-5.1

MIT

Open weights

Release Timeline

When each model was launched

Muse Spark was released on 2026-04-08, while GLM-5.1 was released on 2026-04-07.

Muse Spark is 0 month newer than GLM-5.1.

Muse Spark

Apr 8, 2026

3 months ago

1d newer
GLM-5.1

Apr 7, 2026

3 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

Meta
Supports multimodal inputs
Higher GPQA score (89.5% vs 86.2%)
Higher Humanity's Last Exam score (58.4% vs 52.3%)
Zhipu AI
Larger context window (200,000 tokens)
Has open weights
Higher GDPval-AA score (42.7% vs 38.8%)
Higher SWE-Bench Pro score (58.4% vs 52.4%)
Higher Terminal-Bench 2.0 score (69.0% vs 59.0%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Muse Spark and GLM-5.1 side-by-side, then vote on the output you prefer.

Muse Spark
✓ Preferred
GLM-5.1
Open in Playground
AI Model Comparison Table
Feature
Meta
Muse Spark
Zhipu AI
GLM-5.1

FAQ

Common questions about Muse Spark vs GLM-5.1.

Which is better, Muse Spark or GLM-5.1?

GLM-5.1 has a slight edge in benchmark performance. Muse Spark is made by Meta and GLM-5.1 is made by Zhipu AI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Muse Spark compare to GLM-5.1 in benchmarks?

Muse Spark scores Tau2 Telecom: 91.5%, GPQA: 89.5%, CharXiv-R: 86.4%, ScreenSpot Pro: 84.1%, IPhO 2025: 82.6%. GLM-5.1 scores Vending-Bench 2: 100.0%, AIME 2026: 95.3%, HMMT 2025: 94.0%, GPQA: 86.2%, IMO-AnswerBench: 83.8%.

What are the context window sizes for Muse Spark and GLM-5.1?

Muse Spark supports an unknown number of tokens and GLM-5.1 supports 200K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Muse Spark and GLM-5.1?

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

Who makes Muse Spark and GLM-5.1?

Muse Spark is developed by Meta and GLM-5.1 is developed by Zhipu AI.

Related comparisons