Model Comparison

Muse Spark vs Grok 4.3Which is better in 2026?

Muse Spark significantly outperforms across most benchmarks.

Verdict: Muse Spark vs Grok 4.3 — which is better?

Muse Spark (by Meta) and Grok 4.3 (by xAI) 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 1 benchmarks (GDPval-AA), while Grok 4.3 is better at 0 benchmarks. Muse Spark significantly outperforms across most benchmarks.

Choose Muse Spark if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks

Choose Grok 4.3 if…

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

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Muse Spark outperforms in 1 benchmarks (GDPval-AA), while Grok 4.3 is better at 0 benchmarks.

Muse Spark 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 Grok 4.3 specifies input context (1,000,000 tokens).

Meta
Muse Spark
Input- tokens
Output- tokens
xAI
Grok 4.3
Input1,000,000 tokens
Output- tokens
Fri Jul 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Muse Spark supports multimodal inputs, whereas Grok 4.3 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

Grok 4.3

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.

Muse Spark

Proprietary

Closed source

Grok 4.3

Proprietary

Closed source

Release Timeline

When each model was launched

Muse Spark was released on 2026-04-08, while Grok 4.3 was released on 2026-05-06.

Grok 4.3 is 1 month newer than Muse Spark.

Muse Spark

Apr 8, 2026

3 months ago

Grok 4.3

May 6, 2026

2 months ago

4w 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

Meta
Supports multimodal inputs
Higher GDPval-AA score (38.8% vs 36.7%)
xAI
Larger context window (1,000,000 tokens)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Muse Spark and Grok 4.3 side-by-side, then vote on the output you prefer.

Muse Spark
✓ Preferred
Grok 4.3
Open in Playground
AI Model Comparison Table
Feature
Meta
Muse Spark
xAI
Grok 4.3

FAQ

Common questions about Muse Spark vs Grok 4.3.

Which is better, Muse Spark or Grok 4.3?

Muse Spark significantly outperforms across most benchmarks. Muse Spark is made by Meta and Grok 4.3 is made by xAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Muse Spark compare to Grok 4.3 in benchmarks?

Muse Spark scores Tau2 Telecom: 91.5%, GPQA: 89.5%, CharXiv-R: 86.4%, ScreenSpot Pro: 84.1%, IPhO 2025: 82.6%. Grok 4.3 scores Finance Agent v2: 37.7%, GDPval-AA: 36.7%.

What are the context window sizes for Muse Spark and Grok 4.3?

Muse Spark supports an unknown number of tokens and Grok 4.3 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 Muse Spark and Grok 4.3?

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

Who makes Muse Spark and Grok 4.3?

Muse Spark is developed by Meta and Grok 4.3 is developed by xAI.

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