Model comparison
Claude Fable 5 vs Muse Spark
Claude Fable 5 is the stronger model overall, scoring 66.3 to 50.3 on the Noometry Index.
Last verified . 24 shared benchmarks.
MetaSummary
- They share 24 benchmarks with published results for both. Claude Fable 5 scores higher in 8 categories and Muse Spark in 1 category; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Claude Fable 5 leads 76.8 to 34.9.
- The biggest single-benchmark swing is ProofBench: 95% for Claude Fable 5 and 17% for Muse Spark.
Side by side
| Claude Fable 5 | Muse Spark | |
|---|---|---|
| Provider | Anthropic | Meta |
| Noometry Index | 66.3 | 50.3 |
| Released | 2026-06-07 | 2026-04-08 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | — |
| Max output | 128K | — |
| Input $ / M tokens | $10 | — |
| Output $ / M tokens | $50 | — |
| Results tracked | 61 | 27 |
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Category by category
Coding Claude Fable 5 leads
Claude Fable 5: 67.0 (#4), Muse Spark: 45.6 (#65)
| Benchmark | Claude Fable 5 | Muse Spark |
|---|---|---|
| SciCode | 61% | 51.5% |
| LMArena Coding | 1519 | 1482 |
| DeepSWE | 69.9% | — |
| FrontierCode | 53.5% | — |
| LMArena WebDev | 1626 | — |
| FrontierSWE | 47% | — |
| WeirdML | 91.9% | — |
| MirrorCode | 63.9% | — |
| ALE-Bench | 2,041 | — |
Agentic & Tool Use Not comparable
Claude Fable 5: 54.1 (#2), Muse Spark: —
| Benchmark | Claude Fable 5 | Muse Spark |
|---|---|---|
| APEX-Agents | 63.6% | — |
| Remote Labor Index | 16.1% | — |
| τ²-bench Banking | 39.7% | — |
| PostTrainBench | 41.8% | — |
| GBAEval | 74.5% | — |
| GDP.pdf | 30% | — |
| LMArena Search | 1230 | — |
| Vending-Bench 2 | 5,680 | — |
Reasoning Claude Fable 5 leads
Claude Fable 5: 76.8 (#4), Muse Spark: 34.9 (#61)
| Benchmark | Claude Fable 5 | Muse Spark |
|---|---|---|
| CritPt | 28.6% | 11.3% |
| LMArena Hard Prompts | 1508 | 1475 |
| Epoch Capabilities Index | 163.6 | 152.09 |
| ARC-AGI-2 | 89.2% | — |
| SimpleBench | 81.9% | — |
| Kagi LLM Benchmark | 91.4% | — |
| NYT Connections (extended) | 92.7% | — |
| ARC-AGI-1 | 98.5% | — |
| Chess Puzzles | 41% | — |
| EnigmaEval | 39.3% | — |
| EBR-Bench | 39.5% | — |
| Mystery Game Puzzles | 52% | — |
| DTBench | 98.4% | — |
| LMCA | 61.1% | — |
| Surface Evolver Bench | 95% | — |
| Bench to the Future 3 | 0.13 | — |
Math Claude Fable 5 leads
Claude Fable 5: 88.4 (#5), Muse Spark: 46.8 (#57)
| Benchmark | Claude Fable 5 | Muse Spark |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 100% | 88.9% |
| ProofBench | 95% | 17% |
| LMArena Math | 1519 | 1455 |
| FrontierMath (Tiers 1-3) | 87% | — |
| FrontierMath Tier 4 | 90.2% | — |
| FrontierMath (Feb 2025 set) | — | 39% |
| FrontierMath Erdős | 0% | — |
| FrontierMath Tier 4 (v1) | — | 14.6% |
Knowledge Muse Spark leads
Claude Fable 5: 62.3 (#22), Muse Spark: 65.7 (#12)
| Benchmark | Claude Fable 5 | Muse Spark |
|---|---|---|
| GPQA Diamond | 85.9% | 89.8% |
| LMArena Expert | 1534 | 1458 |
| Humanity's Last Exam | — | 40.6% |
| SimpleQA Verified | 70.7% | — |
Multimodal Claude Fable 5 leads
Claude Fable 5: 45.6 (#14), Muse Spark: 42.7 (#23)
| Benchmark | Claude Fable 5 | Muse Spark |
|---|---|---|
| LMArena Vision | 1326 | 1306 |
| LMArena Document | 1496 | 1444 |
| Blueprint-Bench 2 | 38.6% | — |
| Furniture Assembly | 35.8% | — |
Multilingual Claude Fable 5 leads
Claude Fable 5: 57.6 (#8), Muse Spark: 56.3 (#23)
| Benchmark | Claude Fable 5 | Muse Spark |
|---|---|---|
| LMArena Non-English | 1483 | 1464 |
| LMArena Chinese | 1546 | 1507 |
| LMArena French | 1509 | 1497 |
| LMArena German | 1486 | 1497 |
| LMArena Korean | 1493 | 1457 |
| LMArena Russian | 1507 | 1467 |
| LMArena Spanish | 1503 | 1471 |
| LMArena Japanese | 1507 | — |
Instruction Following Claude Fable 5 leads
Claude Fable 5: 78.8 (#7), Muse Spark: 76.1 (#47)
| Benchmark | Claude Fable 5 | Muse Spark |
|---|---|---|
| LMArena Instruction Following | 1503 | 1443 |
Long Context Claude Fable 5 leads
Claude Fable 5: 46.3 (#22), Muse Spark: 44.4 (#65)
| Benchmark | Claude Fable 5 | Muse Spark |
|---|---|---|
| LMArena Longer Query | 1510 | 1451 |
Writing & Preference Claude Fable 5 leads
Claude Fable 5: 76.1 (#5), Muse Spark: 66.2 (#37)
| Benchmark | Claude Fable 5 | Muse Spark |
|---|---|---|
| LMArena Text | 1491 | 1474 |
| LMArena Creative Writing | 1494 | 1460 |
| LMArena Multi-Turn | 1505 | 1477 |
| EQ-Bench Creative Writing | 1943 | — |
| EQ-Bench 4 | 1340 | — |
Frequently asked questions
Is Claude Fable 5 better than Muse Spark?
Claude Fable 5 is the stronger model overall, scoring 66.3 to 50.3 on the Noometry Index.
Is Claude Fable 5 or Muse Spark better for coding?
Claude Fable 5 scores higher on coding benchmarks: 67.0 versus 45.6 in the Noometry coding category.
How many benchmarks do Claude Fable 5 and Muse Spark share?
24 benchmarks have published results for both models. Claude Fable 5 has 61 scored results on Noometry and Muse Spark has 27.