# Grok 4.5 vs Muse Spark 1.2

> Side-by-side benchmark comparison for Grok 4.5 and Muse Spark 1.2 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/grok-4-5-vs-muse-spark-1-2
- Last updated: September 18, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Pick Muse Spark 1.2 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 1.2 leads overall 70.28 to 67.99.
- The clearest category separation is in reasoning, where the averages are 44.8 for Grok 4.5 and 75.3 for Muse Spark 1.2.
- The biggest single benchmark swing is VulcanBench v3 in Coding, with scores of 89.9% and 87.0%.
- Muse Spark 1.2 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Muse Spark 1.2 also has the larger context window at 1M.

## Model Snapshot

| Property | Grok 4.5 | Muse Spark 1.2 |
|----------|----------|----------|
| Creator | xAI | Meta |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 500K | 1M |
| Overall Score | 67.99 | 70.28 |
| Benchmarks Covered | 15 | 8 |
| Pricing (input/output) | $2.00 / $6.00 | $1.25 / $4.25 |

## Category Breakdown

### Agentic

- Winner: Muse Spark 1.2
- Grok 4.5 public-lane score: 59.5 (Supported · #25/154)
- Muse Spark 1.2 public-lane score: 61 (Supported · #16/154)

| Benchmark | Grok 4.5 | Muse Spark 1.2 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 15.7% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 83.3% | Coming soon | Coming soon |
| deepSwe | 53% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 67.8% | 69.7% | Muse Spark 1.2 |
| Terminal-Bench 2.1 | Coming soon | 82.9% | Coming soon |

### Coding

- Winner: Grok 4.5
- Grok 4.5 public-lane score: 62 (Supported · #16/154)
- Muse Spark 1.2 public-lane score: 60 (Supported · #21/154)

| Benchmark | Grok 4.5 | Muse Spark 1.2 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | 64.7% | Coming soon | Coming soon |
| SWE Multilingual | 78% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 83.3% | Coming soon | Coming soon |
| cursorBench32 | 66.7% | Coming soon | Coming soon |
| VulcanBench v3 | 89.9% | 87.0% | Grok 4.5 |
| LiveCodeBench (Vals) | 87.4% | Coming soon | Coming soon |
| SWE-bench (Vals) | 86.6% | 86.6% | Tie |
| Terminal-Bench 2.1 | Coming soon | 82.9% | Coming soon |
| DeepSWE | Coming soon | 59.3% | Coming soon |
| FrontierSWE v2 | Coming soon | 12.0% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- Grok 4.5 public-lane score: 78.5 (Unranked · 1 rankable row)
- Muse Spark 1.2 public-lane score: Coming soon

### Reasoning

- Winner: Coming soon
- Grok 4.5 public-lane score: 44.8 (#20/20)
- Muse Spark 1.2 public-lane score: 75.3 (Unranked · 2 rankable rows)

| Benchmark | Grok 4.5 | Muse Spark 1.2 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 52.6% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.3% | Coming soon | Coming soon |

### Knowledge

- Winner: Coming soon
- Grok 4.5 public-lane score: 69.4 (Supported · #14/184)
- Muse Spark 1.2 public-lane score: 70.7 (Estimated · #10/184)

| Benchmark | Grok 4.5 | Muse Spark 1.2 | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 92.9% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 89.2% | 88.3% | Grok 4.5 |

## FAQ

### Which is better overall, Grok 4.5 or Muse Spark 1.2?

Muse Spark 1.2 is ahead overall on BenchLM right now.

### Where is the biggest gap between Grok 4.5 and Muse Spark 1.2?

The widest category gap is in reasoning, where the averages are 44.8 for Grok 4.5 and 75.3 for Muse Spark 1.2.

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

Grok 4.5 currently has 15 sourced benchmark scores on BenchLM.

### How many benchmarks does Muse Spark 1.2 cover on BenchLM?

Muse Spark 1.2 currently has 8 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 1.2 vs Muse Spark 1.1](/compare/muse-spark-1-1-vs-muse-spark-1-2)
- [Grok 4.5 vs Muse Spark](/compare/grok-4-5-vs-muse-spark)
- [Muse Spark 1.2 vs Muse Spark](/compare/muse-spark-vs-muse-spark-1-2)

## Explore More

- [Grok 4.5 profile](/models/grok-4-5)
- [Muse Spark 1.2 profile](/models/muse-spark-1-2)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)