# Claude Fable 5.1 vs Muse Spark 1.3

> Side-by-side benchmark comparison for Claude Fable 5.1 and Muse Spark 1.3 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

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

- Shared sourced benchmarks: 13
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Pick Claude Fable 5.1 if you want the stronger benchmark profile. Muse Spark 1.3 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Claude Fable 5.1 leads overall 83.18 to 73.
- The clearest category separation is in mathematics, where the averages are 96.8 for Claude Fable 5.1 and 78.5 for Muse Spark 1.3.
- The biggest single benchmark swing is ApprenticeBench in Agentic, with scores of 72% and 19%.
- Muse Spark 1.3 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | Claude Fable 5.1 | Muse Spark 1.3 |
|----------|----------|----------|
| Creator | Anthropic | Meta |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Overall Score | 83.18 | null |
| Benchmarks Covered | 33 | 20 |
| Pricing (input/output) | $10.00 / $50.00 | $1.25 / $4.25 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Claude Fable 5.1 public-lane score: 80.9 (Supported · #2/128)
- Muse Spark 1.3 public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | Muse Spark 1.3 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 4.0 | 55.80% | Coming soon | Coming soon |
| Terminal-Bench-Science 0.1 | 52.6% | Coming soon | Coming soon |
| OSWorld 2.0 | 41.7% | 66.9% | Muse Spark 1.3 |
| AutomationBench | 31.4% | 49.4% | Muse Spark 1.3 |
| Toolathlon-Verified | 77.8% | Coming soon | Coming soon |
| Toolathlon Verified Pass@3 | 81.5% | Coming soon | Coming soon |
| Toolathlon Verified Pass³ | 73.1% | Coming soon | Coming soon |
| Toolathlon Verified avg. turns | 23.7 turns | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 85.0% | 72.3% | Claude Fable 5.1 |
| ApprenticeBench | 72% | 19% | Claude Fable 5.1 |
| CWE-bench v1 | 58.0% | 55.0% | Claude Fable 5.1 |
| MazeBench | 10% | 0% | Claude Fable 5.1 |
| Terminal-Bench 2.1 | Coming soon | 88.8% | Coming soon |
| JobBench | Coming soon | 64.9% | Coming soon |
| DeepSearchQA | Coming soon | 89.4% | Coming soon |

### Coding

- Winner: Not comparable
- Claude Fable 5.1 public-lane score: 76.8 (Supported · #3/150)
- Muse Spark 1.3 public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | Muse Spark 1.3 | Winner |
|-----------|-----------|-----------|--------|
| Bug Hunt Bench | 43.0 fixes | 32.2 fixes | Claude Fable 5.1 |
| SWE-bench Pro | 81.2% | Coming soon | Coming soon |
| SWE Multilingual | 89.1% | Coming soon | Coming soon |
| SWE Multimodal | 54.7% | Coming soon | Coming soon |
| DeepSWE | 67.4% | 75.4% | Muse Spark 1.3 |
| FrontierSWE v2 | 56.3% | 25.8% | Claude Fable 5.1 |
| ProgramBench | 87.6% | Coming soon | Coming soon |
| CursorBench 3.2 | 73.4% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 90.5% | Coming soon | Coming soon |
| CursorBench 4.0 | 51.8% | 41.6% | Claude Fable 5.1 |
| PostTrainBench v1.1 | 40.2% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 88.8% | Coming soon |
| SWE-Atlas Codebase QnA | Coming soon | 59.4% | Coming soon |

### Reasoning

- Winner: Directional only
- Claude Fable 5.1 public-lane score: 85.2 (#4/28)
- Muse Spark 1.3 public-lane score: 82.9 (#6/28)

| Benchmark | Claude Fable 5.1 | Muse Spark 1.3 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | 97.50% | Coming soon | Coming soon |
| ARC-AGI-2 | 90% | Coming soon | Coming soon |
| GraphWalks BFS 256K–1M | 65.0% | Coming soon | Coming soon |
| MRCR v2 256K-512K | Coming soon | 98.5% | Coming soon |
| MRCR v2 512K-1M | Coming soon | 98.1% | Coming soon |

### Knowledge

- Winner: Not comparable
- Claude Fable 5.1 public-lane score: 86.9 (Supported · #2/184)
- Muse Spark 1.3 public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | Muse Spark 1.3 | Winner |
|-----------|-----------|-----------|--------|
| HLE | 65% | Coming soon | Coming soon |
| HLE w/o tools | 60.9% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 93.4% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 92.4% | Coming soon | Coming soon |

### Instruction Following

- Winner: Not comparable
- Claude Fable 5.1 public-lane score: Coming soon
- Muse Spark 1.3 public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | Muse Spark 1.3 | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | 1.0% | 15.9% | Claude Fable 5.1 |

### Mathematics

- Winner: Not comparable
- Claude Fable 5.1 public-lane score: 96.8 (Unranked · 2 rankable rows)
- Muse Spark 1.3 public-lane score: 78.5 (Unranked · 2 rankable rows)

| Benchmark | Claude Fable 5.1 | Muse Spark 1.3 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 90.175% | 74.035% | Claude Fable 5.1 |
| FrontierMath v2 (Tier 4) | 87.805% | 46.341% | Claude Fable 5.1 |

## FAQ

### Which is better overall, Claude Fable 5.1 or Muse Spark 1.3?

Claude Fable 5.1 is ahead overall on BenchLM right now.

### Where is the biggest gap between Claude Fable 5.1 and Muse Spark 1.3?

The widest category gap is in mathematics, where the averages are 96.8 for Claude Fable 5.1 and 78.5 for Muse Spark 1.3.

### How many benchmarks does Claude Fable 5.1 cover on BenchLM?

Claude Fable 5.1 currently has 33 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

- [Claude Fable 5.1 vs Claude Fable 5](/compare/claude-fable-vs-claude-fable-5-1)
- [Muse Spark 1.3 vs Claude Fable 5](/compare/claude-fable-vs-muse-spark-1-3)
- [Claude Fable 5.1 vs Muse Spark 1.1](/compare/claude-fable-5-1-vs-muse-spark-1-1)
- [Muse Spark 1.3 vs Muse Spark 1.1](/compare/muse-spark-1-1-vs-muse-spark-1-3)

## Explore More

- [Claude Fable 5.1 profile](/models/claude-fable-5-1)
- [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)