Model Comparison

Muse Spark 1.1 vs Grok 4.3Which is better in 2026?

Muse Spark 1.1 significantly outperforms across most benchmarks.

Verdict: Muse Spark 1.1 vs Grok 4.3 — which is better?

Muse Spark 1.1 (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 1.1 outperforms in 1 benchmarks (Finance Agent v2), while Grok 4.3 is better at 0 benchmarks. Muse Spark 1.1 significantly outperforms across most benchmarks.

Choose Muse Spark 1.1 if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • you want the most recent training data — it shipped Jul 2026

Choose Grok 4.3 if…

  • you want predictable pricing at $1.25/M input and $2.50/M output

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Muse Spark 1.1 outperforms in 1 benchmarks (Finance Agent v2), while Grok 4.3 is better at 0 benchmarks.

Muse Spark 1.1 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 1.1
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 1.1 supports multimodal inputs, whereas Grok 4.3 does not.

Muse Spark 1.1 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Muse Spark 1.1

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 1.1

Proprietary

Closed source

Grok 4.3

Proprietary

Closed source

Release Timeline

When each model was launched

Muse Spark 1.1 was released on 2026-07-09, while Grok 4.3 was released on 2026-05-06.

Muse Spark 1.1 is 2 months newer than Grok 4.3.

Muse Spark 1.1

Jul 9, 2026

1 weeks ago

2mo newer
Grok 4.3

May 6, 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

Meta
Supports multimodal inputs
Higher Finance Agent v2 score (57.2% vs 37.7%)
xAI
Larger context window (1,000,000 tokens)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Muse Spark 1.1 and Grok 4.3 side-by-side, then vote on the output you prefer.

Muse Spark 1.1
✓ Preferred
Grok 4.3
Open in Playground
AI Model Comparison Table
Feature
Meta
Muse Spark 1.1
xAI
Grok 4.3

FAQ

Common questions about Muse Spark 1.1 vs Grok 4.3.

Which is better, Muse Spark 1.1 or Grok 4.3?

Muse Spark 1.1 significantly outperforms across most benchmarks. Muse Spark 1.1 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 1.1 compare to Grok 4.3 in benchmarks?

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%. Grok 4.3 scores Finance Agent v2: 37.7%, GDPval-AA: 36.7%.

What are the context window sizes for Muse Spark 1.1 and Grok 4.3?

Muse Spark 1.1 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 1.1 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 1.1 and Grok 4.3?

Muse Spark 1.1 is developed by Meta and Grok 4.3 is developed by xAI.

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