Model Comparison

Muse Spark vs Kimi K3Which is better in 2026?

Kimi K3 significantly outperforms across most benchmarks.

Verdict: Muse Spark vs Kimi K3 — which is better?

Muse Spark (by Meta) and Kimi K3 (by Moonshot AI) 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 (Humanity's Last Exam), while Kimi K3 is better at 6 benchmarks (CharXiv-R, DeepSearchQA, GDPval-AA, GPQA, MMMU-Pro, ZEROBench). Kimi K3 significantly outperforms across most benchmarks.

Choose Muse Spark if…

  • you are already invested in the Meta ecosystem

Choose Kimi K3 if…

  • you want the strongest raw capability — it leads on 6 of 7 shared benchmarks
  • you want the most recent training data — it shipped Jul 2026

Performance Benchmarks

Comparative analysis across standard metrics

7 benchmarks

Muse Spark outperforms in 1 benchmarks (Humanity's Last Exam), while Kimi K3 is better at 6 benchmarks (CharXiv-R, DeepSearchQA, GDPval-AA, GPQA, MMMU-Pro, ZEROBench).

Kimi K3 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 Kimi K3 specifies input context (1,048,576 tokens). Only Kimi K3 specifies output context (1,048,576 tokens).

Meta
Muse Spark
Input- tokens
Output- tokens
Moonshot AI
Kimi K3
Input1,048,576 tokens
Output1,048,576 tokens
Fri Jul 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Muse Spark and Kimi K3 support multimodal inputs.

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

Muse Spark

Text
Images
Audio
Video

Kimi K3

Text
Images
Audio
Video

Release Timeline

When each model was launched

Muse Spark was released on 2026-04-08, while Kimi K3 was released on 2026-07-16.

Kimi K3 is 3 months newer than Muse Spark.

Muse Spark

Apr 8, 2026

3 months ago

Kimi K3

Jul 16, 2026

1 days ago

3mo 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
Higher Humanity's Last Exam score (58.4% vs 56.0%)
Moonshot AI
Larger context window (1,048,576 tokens)
Has open weights
Higher CharXiv-R score (91.3% vs 86.4%)
Higher DeepSearchQA score (95.0% vs 74.8%)
Higher GDPval-AA score (55.6% vs 38.8%)
Higher GPQA score (93.5% vs 89.5%)
Higher MMMU-Pro score (81.6% vs 80.4%)
Higher ZEROBench score (41.0% vs 33.0%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Muse Spark and Kimi K3 side-by-side, then vote on the output you prefer.

Muse Spark
✓ Preferred
Kimi K3
Open in Playground
AI Model Comparison Table
Feature
Meta
Muse Spark
Moonshot AI
Kimi K3

FAQ

Common questions about Muse Spark vs Kimi K3.

Which is better, Muse Spark or Kimi K3?

Kimi K3 significantly outperforms across most benchmarks. Muse Spark is made by Meta and Kimi K3 is made by Moonshot AI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Muse Spark compare to Kimi K3 in benchmarks?

Muse Spark scores Tau2 Telecom: 91.5%, GPQA: 89.5%, CharXiv-R: 86.4%, ScreenSpot Pro: 84.1%, IPhO 2025: 82.6%. Kimi K3 scores MathVision: 97.8%, DeepSearchQA: 95.0%, GPQA: 93.5%, CharXiv-R: 91.3%, BrowseComp: 91.2%.

What are the context window sizes for Muse Spark and Kimi K3?

Muse Spark supports an unknown number of tokens and Kimi K3 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 Kimi K3?

Key differences include licensing (Proprietary vs Unknown). See the full comparison above for benchmark-by-benchmark results.

Who makes Muse Spark and Kimi K3?

Muse Spark is developed by Meta and Kimi K3 is developed by Moonshot AI.

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