Model Comparison

Muse Spark 1.1 vs Claude Mythos PreviewWhich is better in 2026?

Claude Mythos Preview shows notably better performance in the majority of benchmarks.

Verdict: Muse Spark 1.1 vs Claude Mythos Preview — which is better?

Muse Spark 1.1 (by Meta) and Claude Mythos Preview (by Anthropic) 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 (OSWorld-Verified), while Claude Mythos Preview is better at 3 benchmarks (CharXiv-R, Humanity's Last Exam, SWE-Bench Pro). Claude Mythos Preview shows notably better performance in the majority of benchmarks.

Choose Muse Spark 1.1 if…

  • you are already invested in the Meta ecosystem

Choose Claude Mythos Preview if…

  • you want the strongest raw capability — it leads on 3 of 4 shared benchmarks

Performance Benchmarks

Comparative analysis across standard metrics

4 benchmarks

Muse Spark 1.1 outperforms in 1 benchmarks (OSWorld-Verified), while Claude Mythos Preview is better at 3 benchmarks (CharXiv-R, Humanity's Last Exam, SWE-Bench Pro).

Claude Mythos Preview shows notably better performance in the majority of benchmarks.

Fri Jul 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Input Capabilities

Supported data types and modalities

Both Muse Spark 1.1 and Claude Mythos Preview support multimodal inputs.

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

Muse Spark 1.1

Text
Images
Audio
Video

Claude Mythos Preview

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

Claude Mythos Preview

Proprietary

Closed source

Release Timeline

When each model was launched

Muse Spark 1.1 was released on 2026-07-09, while Claude Mythos Preview's release date is not specified.

We can confirm Muse Spark 1.1's release timeline, but cannot make a direct age comparison without Claude Mythos Preview's release date.

Muse Spark 1.1

Jul 9, 2026

1 weeks ago

Claude Mythos Preview

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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
Higher OSWorld-Verified score (80.8% vs 79.6%)
Anthropic
Higher CharXiv-R score (93.2% vs 88.4%)
Higher Humanity's Last Exam score (64.7% vs 62.1%)
Higher SWE-Bench Pro score (77.8% vs 61.5%)

Detailed Comparison

Interactive Arena

Judge for yourself.

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

Muse Spark 1.1
✓ Preferred
Claude Mythos Preview
Open in Playground
AI Model Comparison Table
Feature
Meta
Muse Spark 1.1
Anthropic
Claude Mythos Preview

FAQ

Common questions about Muse Spark 1.1 vs Claude Mythos Preview.

Which is better, Muse Spark 1.1 or Claude Mythos Preview?

Claude Mythos Preview shows notably better performance in the majority of benchmarks. Muse Spark 1.1 is made by Meta and Claude Mythos Preview is made by Anthropic. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Muse Spark 1.1 compare to Claude Mythos Preview 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%. Claude Mythos Preview scores CyBench: 100.0%, USAMO25: 97.6%, GPQA: 94.6%, SWE-Bench Verified: 93.9%, CharXiv-R: 93.2%.

Who makes Muse Spark 1.1 and Claude Mythos Preview?

Muse Spark 1.1 is developed by Meta and Claude Mythos Preview is developed by Anthropic.

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