Model Comparison

Claude Opus 4.8 vs Muse Spark 1.1Which is better in 2026?

Muse Spark 1.1 has a slight edge in benchmark performance.

Verdict: Claude Opus 4.8 vs Muse Spark 1.1 — which is better?

Claude Opus 4.8 (by Anthropic) 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.

Claude Opus 4.8 outperforms in 3 benchmarks (CharXiv-R, OSWorld-Verified, SWE-Bench Pro), while Muse Spark 1.1 is better at 4 benchmarks (Finance Agent v2, Humanity's Last Exam, MCP Atlas, Toolathlon). Muse Spark 1.1 has a slight edge in benchmark performance.

Choose Claude Opus 4.8 if…

  • you want predictable pricing at $5.00/M input and $25.00/M output

Choose Muse Spark 1.1 if…

  • you want the strongest raw capability — it leads on 4 of 7 shared benchmarks
  • you want the most recent training data — it shipped Jul 2026

Performance Benchmarks

Comparative analysis across standard metrics

7 benchmarks

Claude Opus 4.8 outperforms in 3 benchmarks (CharXiv-R, OSWorld-Verified, SWE-Bench Pro), while Muse Spark 1.1 is better at 4 benchmarks (Finance Agent v2, Humanity's Last Exam, MCP Atlas, Toolathlon).

Muse Spark 1.1 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 Claude Opus 4.8 specifies input context (1,000,000 tokens). Only Claude Opus 4.8 specifies output context (128,000 tokens).

Anthropic
Claude Opus 4.8
Input1,000,000 tokens
Output128,000 tokens
Meta
Muse Spark 1.1
Input- tokens
Output- tokens
Fri Jul 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Opus 4.8 and Muse Spark 1.1 support multimodal inputs.

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

Claude Opus 4.8

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.

Claude Opus 4.8

Proprietary

Closed source

Muse Spark 1.1

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Opus 4.8 was released on 2026-05-28, while Muse Spark 1.1 was released on 2026-07-09.

Muse Spark 1.1 is 1 month newer than Claude Opus 4.8.

Claude Opus 4.8

May 28, 2026

1 months ago

Muse Spark 1.1

Jul 9, 2026

1 weeks ago

1mo 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

Anthropic
Larger context window (1,000,000 tokens)
Higher CharXiv-R score (89.9% vs 88.4%)
Higher OSWorld-Verified score (83.4% vs 80.8%)
Higher SWE-Bench Pro score (69.2% vs 61.5%)
Meta
Higher Finance Agent v2 score (57.2% vs 53.9%)
Higher Humanity's Last Exam score (62.1% vs 57.9%)
Higher MCP Atlas score (88.1% vs 82.2%)
Higher Toolathlon score (75.6% vs 59.9%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Claude Opus 4.8 and Muse Spark 1.1 side-by-side, then vote on the output you prefer.

Claude Opus 4.8
✓ Preferred
Muse Spark 1.1
Open in Playground
AI Model Comparison Table
Feature
Anthropic
Claude Opus 4.8
Meta
Muse Spark 1.1

FAQ

Common questions about Claude Opus 4.8 vs Muse Spark 1.1.

Which is better, Claude Opus 4.8 or Muse Spark 1.1?

Muse Spark 1.1 has a slight edge in benchmark performance. Claude Opus 4.8 is made by Anthropic and Muse Spark 1.1 is made by Meta. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude Opus 4.8 compare to Muse Spark 1.1 in benchmarks?

Claude Opus 4.8 scores GPQA: 93.6%, DeepSearchQA: 93.1%, CharXiv-R: 89.9%, SWE-Bench Verified: 88.6%, ScreenSpot Pro: 87.9%. 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 Claude Opus 4.8 and Muse Spark 1.1?

Claude Opus 4.8 supports 1.0M tokens and Muse Spark 1.1 supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

Who makes Claude Opus 4.8 and Muse Spark 1.1?

Claude Opus 4.8 is developed by Anthropic and Muse Spark 1.1 is developed by Meta.

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