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Muse Spark vs Solar Pro 4

Muse Spark leads the LLM Stats Score 41.7 to 35.1.

Meta · Upstage · Updated for 2026

Which is better?

Muse Spark leads the overall LLM Stats Score 41.7 to 35.1, ranking #58 overall.

In the 2 individual benchmarks reported for both models, Muse Spark wins 2; this is a narrower head-to-head signal than the composite indexes.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Muse Spark

  • overall performance matters — it scores 41.7 and ranks #58 on LLM Stats
  • you value its reported benchmark strengths — it wins 2 of 2 exact shared results

Choose Solar Pro 4

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

At a glance

The differences that matter most.

Muse Spark
Meta
Solar Pro 4
Upstage
Core performance indexes
LLM Stats Score
41.7
#58
35.1
#96
Reasoning
40.5
#57
34.7
#91
Coding
22.9
#84
21.0
#99
Agents
14.1
#98
11.5
#115
Cost, coverage & limits
Benchmark wins
2 of 2
0 of 2
Input price
— / M
$0.30 / M
Output price
— / M
$1.20 / M
Context window
—
524,288

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Muse Spark
Solar Pro 4
Tool use
16.2#87
8.7#141
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

19 reported for Muse Spark · 9 for Solar Pro 4

2 shared

Muse Spark outperforms in 2 benchmarks (GPQA, SWE-Bench Verified), while Solar Pro 4 is better at 0 benchmarks.

Muse Spark significantly outperforms across most benchmarks.

Wed Oct 07 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Solar Pro 4 specifies input context (524,288 tokens). Only Solar Pro 4 specifies output context (131,072 tokens).

Meta
Muse Spark
Input- tokens
Output- tokens
Upstage
Solar Pro 4
Input524,288 tokens
Output131,072 tokens
Wed Oct 07 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Muse Spark supports multimodal inputs, whereas Solar Pro 4 does not.

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

Muse Spark

Text
Images
Audio
Video

Solar Pro 4

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

Proprietary

Closed source

Solar Pro 4

Proprietary

Closed source

Release Timeline

When each model was launched

Muse Spark was released on 2026-04-08, while Solar Pro 4 was released on 2026-08-06.

Solar Pro 4 is 4 months newer than Muse Spark.

Muse Spark

Apr 8, 2026

6 months ago

Solar Pro 4

Aug 6, 2026

2 months ago

4mo 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?

Judge for yourself.

Run your own prompts against Muse Spark and Solar Pro 4 side-by-side, then vote on the output you prefer.

Muse Spark
✓ Preferred
Solar Pro 4
Open in Playground

FAQ

Common questions about Muse Spark vs Solar Pro 4.

Which is better, Muse Spark or Solar Pro 4?

Muse Spark leads the LLM Stats Score 41.7 to 35.1. Muse Spark is made by Meta and Solar Pro 4 is made by Upstage. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Muse Spark compare to Solar Pro 4 in benchmarks?

Muse Spark scores Tau2 Telecom: 91.5%, GPQA: 89.5%, CharXiv-R: 86.4%, ScreenSpot Pro: 84.1%, IPhO 2025: 82.6%. Solar Pro 4 scores AIME 2026: 95.3%, GPQA: 89.0%, LiveCodeBench: 87.8%, MMLU-Pro: 86.3%, AA-LCR: 71.0%.

What are the context window sizes for Muse Spark and Solar Pro 4?

Muse Spark supports an unknown number of tokens and Solar Pro 4 supports 524K 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 Solar Pro 4?

Key differences include LLM Stats Score (41.7 vs 35.1), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.

Who makes Muse Spark and Solar Pro 4?

Muse Spark is developed by Meta and Solar Pro 4 is developed by Upstage.

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