Model Comparison

Grok-1.5 vs Muse Spark 1.1Which is better in 2026?

Comparing Grok-1.5 and Muse Spark 1.1 across benchmarks, pricing, and capabilities.

Verdict: Grok-1.5 vs Muse Spark 1.1 — which is better?

Grok-1.5 (by xAI) 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.

Choose Grok-1.5 if…

  • you are already invested in the xAI ecosystem

Choose Muse Spark 1.1 if…

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

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Grok-1.5 and Muse Spark 1.1don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only Muse Spark 1.1 specifies input context (1,048,576 tokens). Only Muse Spark 1.1 specifies output context (131,072 tokens).

xAI
Grok-1.5
Input- tokens
Output- tokens
Meta
Muse Spark 1.1
Input1,048,576 tokens
Output131,072 tokens
Sat Jul 18 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Muse Spark 1.1 supports multimodal inputs, whereas Grok-1.5 does not.

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

Grok-1.5

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.

Grok-1.5

Proprietary

Closed source

Muse Spark 1.1

Proprietary

Closed source

Release Timeline

When each model was launched

Grok-1.5 was released on 2024-03-28, while Muse Spark 1.1 was released on 2026-07-09.

Muse Spark 1.1 is 28 months newer than Grok-1.5.

Grok-1.5

Mar 28, 2024

2.3 years ago

Muse Spark 1.1

Jul 9, 2026

1 weeks ago

2.3yr 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

xAI

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

Meta
Larger context window (1,048,576 tokens)
Supports multimodal inputs

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Grok-1.5 and Muse Spark 1.1 side-by-side, then vote on the output you prefer.

Grok-1.5
✓ Preferred
Muse Spark 1.1
Open in Playground
AI Model Comparison Table
Feature
xAI
Grok-1.5
Meta
Muse Spark 1.1

FAQ

Common questions about Grok-1.5 vs Muse Spark 1.1.

Which is better, Grok-1.5 or Muse Spark 1.1?

Grok-1.5 (xAI) and Muse Spark 1.1 (Meta) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does Grok-1.5 compare to Muse Spark 1.1 in benchmarks?

Grok-1.5 scores GSM8k: 90.0%, DocVQA: 85.6%, MMLU: 81.3%, HumanEval: 74.1%, MMMU: 53.6%. 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%.

What are the context window sizes for Grok-1.5 and Muse Spark 1.1?

Grok-1.5 supports an unknown number of tokens and Muse Spark 1.1 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 Grok-1.5 and Muse Spark 1.1?

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

Who makes Grok-1.5 and Muse Spark 1.1?

Grok-1.5 is developed by xAI and Muse Spark 1.1 is developed by Meta.

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