# Grok 4.5 vs Muse Spark 1.3

> Side-by-side benchmark comparison for Grok 4.5 and Muse Spark 1.3 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/grok-4-5-vs-muse-spark-1-3
- Last updated: October 17, 2026

- Shared sourced benchmarks: 5
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Pick Muse Spark 1.3 if you want the stronger benchmark profile. Grok 4.5 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Muse Spark 1.3 leads overall 73 to 63.28.
- The clearest category separation is in reasoning, where the averages are 54.1 for Grok 4.5 and 82.9 for Muse Spark 1.3.
- The biggest single benchmark swing is FrontierMath v2 (Tier 4) in Mathematics, with scores of 24.390% and 46.341%.
- Muse Spark 1.3 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Muse Spark 1.3 also has the larger context window at 1M.

## Model Snapshot

| Property | Grok 4.5 | Muse Spark 1.3 |
|----------|----------|----------|
| Creator | xAI | Meta |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 500K | 1M |
| Overall Score | 63.28 | null |
| Benchmarks Covered | 19 | 20 |
| Pricing (input/output) | $2.00 / $6.00 | $1.25 / $4.25 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Grok 4.5 public-lane score: 58.9 (Supported · #31/128)
- Muse Spark 1.3 public-lane score: Coming soon

| Benchmark | Grok 4.5 | Muse Spark 1.3 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 15.7% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 83.3% | 88.8% | Muse Spark 1.3 |
| deepSwe | 53% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 67.8% | 72.3% | Muse Spark 1.3 |
| JobBench | Coming soon | 64.9% | Coming soon |
| OSWorld 2.0 | Coming soon | 66.9% | Coming soon |
| DeepSearchQA | Coming soon | 89.4% | Coming soon |
| AutomationBench | Coming soon | 49.4% | Coming soon |
| ApprenticeBench | Coming soon | 19% | Coming soon |
| CWE-bench v1 | Coming soon | 55.0% | Coming soon |
| MazeBench | Coming soon | 0% | Coming soon |

### Coding

- Winner: Not comparable
- Grok 4.5 public-lane score: 55.7 (Supported · #30/150)
- Muse Spark 1.3 public-lane score: Coming soon

| Benchmark | Grok 4.5 | Muse Spark 1.3 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | 64.7% | Coming soon | Coming soon |
| SWE Multilingual | 78% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 83.3% | 88.8% | Muse Spark 1.3 |
| CursorBench 3.2 | 66.7% | Coming soon | Coming soon |
| VulcanBench v3 | 89.9% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 87.4% | Coming soon | Coming soon |
| SWE-bench (Vals) | 86.6% | Coming soon | Coming soon |
| PostTrainBench v1.1 | 23.4% | Coming soon | Coming soon |
| DeepSWE | Coming soon | 75.4% | Coming soon |
| SWE-Atlas Codebase QnA | Coming soon | 59.4% | Coming soon |
| CursorBench 4.0 | Coming soon | 41.6% | Coming soon |
| Bug Hunt Bench | Coming soon | 32.2 fixes | Coming soon |
| FrontierSWE v2 | Coming soon | 25.8% | Coming soon |

### Reasoning

- Winner: Directional only
- Grok 4.5 public-lane score: 54.1 (#28/28)
- Muse Spark 1.3 public-lane score: 82.9 (#6/28)

| Benchmark | Grok 4.5 | Muse Spark 1.3 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 52.6% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.3% | Coming soon | Coming soon |
| ARC-AGI-1 | 85.67% | Coming soon | Coming soon |
| MRCR v2 256K-512K | Coming soon | 98.5% | Coming soon |
| MRCR v2 512K-1M | Coming soon | 98.1% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Grok 4.5 public-lane score: 82.9 (Unranked · 1 rankable row)
- Muse Spark 1.3 public-lane score: Coming soon

### Knowledge

- Winner: Not comparable
- Grok 4.5 public-lane score: 67.5 (Supported · #28/184)
- Muse Spark 1.3 public-lane score: Coming soon

| Benchmark | Grok 4.5 | Muse Spark 1.3 | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 92.9% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 89.2% | Coming soon | Coming soon |

### Instruction Following

- Winner: Not comparable
- Grok 4.5 public-lane score: Coming soon
- Muse Spark 1.3 public-lane score: Coming soon

| Benchmark | Grok 4.5 | Muse Spark 1.3 | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | Coming soon | 15.9% | Coming soon |

### Mathematics

- Winner: Not comparable
- Grok 4.5 public-lane score: 62.9 (Unranked · 2 rankable rows)
- Muse Spark 1.3 public-lane score: 78.5 (Unranked · 2 rankable rows)

| Benchmark | Grok 4.5 | Muse Spark 1.3 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 57.193% | 74.035% | Muse Spark 1.3 |
| FrontierMath v2 (Tier 4) | 24.390% | 46.341% | Muse Spark 1.3 |

## FAQ

### Which is better overall, Grok 4.5 or Muse Spark 1.3?

Muse Spark 1.3 is ahead overall on BenchLM right now.

### Where is the biggest gap between Grok 4.5 and Muse Spark 1.3?

The widest category gap is in reasoning, where the averages are 54.1 for Grok 4.5 and 82.9 for Muse Spark 1.3.

### How many benchmarks does Grok 4.5 cover on BenchLM?

Grok 4.5 currently has 19 sourced benchmark scores on BenchLM.

### How many benchmarks does Muse Spark 1.3 cover on BenchLM?

Muse Spark 1.3 currently has 20 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Grok 4.5 vs Muse Spark 1.1](/compare/grok-4-5-vs-muse-spark-1-1)
- [Muse Spark 1.3 vs Muse Spark 1.1](/compare/muse-spark-1-1-vs-muse-spark-1-3)
- [Grok 4.5 vs Muse Spark 1.2](/compare/grok-4-5-vs-muse-spark-1-2)
- [Muse Spark 1.3 vs Muse Spark 1.2](/compare/muse-spark-1-2-vs-muse-spark-1-3)

## Explore More

- [Grok 4.5 profile](/models/grok-4-5)
- [Muse Spark 1.3 profile](/models/muse-spark-1-3)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)