# Muse Spark 1.3 vs Solar Pro 4

> Side-by-side benchmark comparison for Muse Spark 1.3 and Solar Pro 4 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/muse-spark-1-3-vs-solar-pro-4
- Last updated: September 10, 2026

- Shared sourced benchmarks: 2
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: Muse Spark 1.3 and Solar Pro 4 share only 2 sourced benchmark rows.

## Summary

- Only 2 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Solar Pro 4 has the lower published output-token price.
- Muse Spark 1.3 has the larger published context window at 1M.

## Model Snapshot

| Property | Muse Spark 1.3 | Solar Pro 4 |
|----------|----------|----------|
| Creator | Meta | Upstage |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 512K |
| Independent public score (not head-to-head) | null | null |
| Benchmarks Covered | 10 | 10 |
| Pricing (input/output) | $1.25 / $4.25 | $0.30 / $1.20 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Muse Spark 1.3 public-lane score: Coming soon
- Solar Pro 4 public-lane score: Coming soon

| Benchmark | Muse Spark 1.3 | Solar Pro 4 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 88.8% | 57.0% | Muse Spark 1.3 |
| JobBench | 64.9% | Coming soon | Coming soon |
| OSWorld 2.0 | 66.9% | Coming soon | Coming soon |
| DeepSearchQA | 89.4% | Coming soon | Coming soon |
| AutomationBench | 49.4% | Coming soon | Coming soon |
| BrowseComp | Coming soon | 49.2% | Coming soon |
| MCP Atlas | Coming soon | 61.4% | Coming soon |
| APEX-Agents | Coming soon | 18.7% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Muse Spark 1.3 public-lane score: Coming soon
- Solar Pro 4 public-lane score: Coming soon

| Benchmark | Muse Spark 1.3 | Solar Pro 4 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 88.8% | 57.0% | Muse Spark 1.3 |
| DeepSWE | 75.4% | Coming soon | Coming soon |
| SWE-Atlas Codebase QnA | 59.4% | Coming soon | Coming soon |
| SWE-bench Verified | Coming soon | 70.6% | Coming soon |
| LiveCodeBench | Coming soon | 87.8% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Muse Spark 1.3 public-lane score: 78 (#5/20)
- Solar Pro 4 public-lane score: Coming soon

| Benchmark | Muse Spark 1.3 | Solar Pro 4 | Winner |
|-----------|-----------|-----------|--------|
| MRCR v2 256K-512K | 98.5% | Coming soon | Coming soon |
| MRCR v2 512K-1M | 98.1% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Muse Spark 1.3 public-lane score: Coming soon
- Solar Pro 4 public-lane score: Coming soon

| Benchmark | Muse Spark 1.3 | Solar Pro 4 | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | Coming soon | 89.0% | Coming soon |
| MMLU-Pro | Coming soon | 86.3% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Muse Spark 1.3 public-lane score: Coming soon
- Solar Pro 4 public-lane score: Coming soon

| Benchmark | Muse Spark 1.3 | Solar Pro 4 | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | Coming soon | 95.3% | Coming soon |

## FAQ

### Is there enough evidence to pick between Muse Spark 1.3 and Solar Pro 4?

Not yet. The models share only 2 sourced benchmark rows, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [Muse Spark 1.3 vs Muse Spark 1.2](/compare/muse-spark-1-2-vs-muse-spark-1-3)
- [Solar Pro 4 vs Muse Spark 1.2](/compare/muse-spark-1-2-vs-solar-pro-4)
- [Muse Spark 1.3 vs Muse Spark 1.1](/compare/muse-spark-1-1-vs-muse-spark-1-3)
- [Solar Pro 4 vs Muse Spark 1.1](/compare/muse-spark-1-1-vs-solar-pro-4)

## Explore More

- [Muse Spark 1.3 profile](/models/muse-spark-1-3)
- [Solar Pro 4 profile](/models/solar-pro-4)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)