# Grok 4.3 vs Muse Spark 1.3

> Side-by-side benchmark comparison for Grok 4.3 and Muse Spark 1.3 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

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

- Shared sourced benchmarks: 3
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: Grok 4.3 and Muse Spark 1.3 share only 3 sourced benchmark rows.

## Summary

- Only 3 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Grok 4.3 has the lower published output-token price.

## Model Snapshot

| Property | Grok 4.3 | Muse Spark 1.3 |
|----------|----------|----------|
| Creator | xAI | Meta |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Independent public score (not head-to-head) | 53.07 | null |
| Benchmarks Covered | 9 | 20 |
| Pricing (input/output) | $1.25 / $2.50 | $1.25 / $4.25 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Grok 4.3 public-lane score: 28.3 (Supported · #96/128)
- Muse Spark 1.3 public-lane score: Coming soon

| Benchmark | Grok 4.3 | Muse Spark 1.3 | Winner |
|-----------|-----------|-----------|--------|
| Gert Labs | 43.86% | Coming soon | Coming soon |
| ResearchClawBench | 12.4% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 41.9% | 72.3% | Muse Spark 1.3 |
| Terminal-Bench 2.1 | Coming soon | 88.8% | Coming soon |
| 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: Insufficient shared evidence
- Grok 4.3 public-lane score: 26.4 (Supported · #104/150)
- Muse Spark 1.3 public-lane score: Coming soon

| Benchmark | Grok 4.3 | Muse Spark 1.3 | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench (Vals) | 84.5% | Coming soon | Coming soon |
| SWE-bench (Vals) | 71.4% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 88.8% | 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: Insufficient shared evidence
- Grok 4.3 public-lane score: 70 (Unranked · 2 rankable rows)
- Muse Spark 1.3 public-lane score: 82.9 (#6/28)

| Benchmark | Grok 4.3 | Muse Spark 1.3 | Winner |
|-----------|-----------|-----------|--------|
| MRCR v2 256K-512K | Coming soon | 98.5% | Coming soon |
| MRCR v2 512K-1M | Coming soon | 98.1% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Grok 4.3 public-lane score: 78.8 (#20/54)
- Muse Spark 1.3 public-lane score: Coming soon

### Knowledge

- Winner: Insufficient shared evidence
- Grok 4.3 public-lane score: 55 (Supported · #61/184)
- Muse Spark 1.3 public-lane score: Coming soon

| Benchmark | Grok 4.3 | Muse Spark 1.3 | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 91.4% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 85.8% | Coming soon | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Grok 4.3 public-lane score: 97.1 (#1/148)
- Muse Spark 1.3 public-lane score: Coming soon

| Benchmark | Grok 4.3 | Muse Spark 1.3 | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | Coming soon | 15.9% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Grok 4.3 public-lane score: 51.4 (Unranked · 2 rankable rows)
- Muse Spark 1.3 public-lane score: 78.5 (Unranked · 2 rankable rows)

| Benchmark | Grok 4.3 | Muse Spark 1.3 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 42.807% | 74.035% | Muse Spark 1.3 |
| FrontierMath v2 (Tier 4) | 14.634% | 46.341% | Muse Spark 1.3 |

## FAQ

### Is there enough evidence to pick between Grok 4.3 and Muse Spark 1.3?

Not yet. The models share only 3 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

- [Grok 4.3 vs Muse Spark 1.1](/compare/grok-4-3-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 4.3 vs Muse Spark 1.2](/compare/grok-4-3-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 4.3 profile](/models/grok-4-3)
- [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)