Model comparison
Claude Mythos 5 vs Muse Spark
Head-to-head evidence from 6 shared benchmark results across 4 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Claude Mythos 5 #1 (Supported); Muse Spark #13 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude Mythos 5 and Muse Spark share 6 comparable benchmark results. 5 of 8 categories are comparable. 9 results are unique to Claude Mythos 5; 33 to Muse Spark.
Updated July 23, 2026- Shared results
- 6
- Claude Mythos 5 only
- 9
- Muse Spark only
- 33
- Comparable categories
- 5 / 8
Pick Claude Mythos 5 if you want the stronger benchmark profile. Muse Spark only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
Confidence note. This is a partial-evidence comparison with 6 shared benchmark results across 4 evidence categories; 5 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Claude Mythos 5 is clearly ahead on the BenchAlign aggregate, 83.93 to 71.04. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Claude Mythos 5's sharpest advantage is in mathematics, where it averages 97.6 against 32.9. The single biggest benchmark swing on the page is Terminal-Bench 2.0, 88% to 59%.
Claude Mythos 5 gives you the larger context window at 1M+, compared with 262K for Muse Spark.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | Claude Mythos 5 | Δ | Muse Spark |
|---|---|---|---|
| Math | Claude Mythos 597.6 | Margin← 64.7 | Muse Spark32.9 |
| Agentic | Claude Mythos 587.0 | Margin← 28.0 | Muse Spark59.0 |
| Coding | Claude Mythos 589.7 | Margin← 21.9 | Muse Spark67.8 |
| Knowledge | Claude Mythos 568.5 | Margin← 18.1 | Muse Spark50.4 |
| Multimodal | Claude Mythos 593.5 | Margin← 11.0 | Muse Spark82.5 |
| Reasoning | Claude Mythos 5Not measured | MarginNo overlap | Muse Spark42.5 |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
Terminal-Bench 2.0
AgenticA 88%B 59%Winner: Claude Mythos 5Δ 29Terminal-Bench 2.0: Claude Mythos 5 scored 88%; Muse Spark scored 59%. Claude Mythos 5 wins this benchmark. - Source ↗
SWE-bench Pro
CodingA 80.3%B 52.4%Winner: Claude Mythos 5Δ 27.9SWE-bench Pro: Claude Mythos 5 scored 80.3%; Muse Spark scored 52.4%. Claude Mythos 5 wins this benchmark. - Source ↗
SWE-bench Verified
CodingA 95.5%B 77.4%Winner: Claude Mythos 5Δ 18.1SWE-bench Verified: Claude Mythos 5 scored 95.5%; Muse Spark scored 77.4%. Claude Mythos 5 wins this benchmark. - Source ↗
HLE
KnowledgeA 64.5%B 50.4%Winner: Claude Mythos 5Δ 14.1HLE: Claude Mythos 5 scored 64.5%; Muse Spark scored 50.4%. Claude Mythos 5 wins this benchmark. - Source ↗
CharXiv
MultimodalA 93.5%B 86.4%Winner: Claude Mythos 5Δ 7.1CharXiv: Claude Mythos 5 scored 93.5%; Muse Spark scored 86.4%. Claude Mythos 5 wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude Mythos 5 | Muse Spark | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude Mythos 5$10 input / $50 output | Muse SparkNot available | A complete price comparison is not available. |
| Generation speedtokens per second | Claude Mythos 5Not available | Muse SparkNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude Mythos 5Not available | Muse SparkNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude Mythos 51M+ | Muse Spark262K | Claude Mythos 5 lists the larger context window. |
Benchmark Deep Dive
AgenticClaude Mythos 5 wins11 benchmarks
| Benchmark | Claude Mythos 5 | Muse Spark | Result |
|---|---|---|---|
| Terminal-Bench 2.0Source | 88% | 59% | Claude Mythos 5 leads |
| OSWorld-VerifiedSource | 85% | — | Not comparable |
| BrowseCompSource | 88% | — | Not comparable |
| ExploitGymSource | 17.5% | — | Not comparable |
| τ²-bench resultsSource | — | 91.5% | Not comparable |
| DeepSearchQASource | — | 74.8% | Not comparable |
| CyberGymSource | — | 43.5% | Not comparable |
| Claw-EvalSource | — | 63.8% | Not comparable |
| AA Agentic IndexSource | — | 28.7% | Not comparable |
| GDPval-AASource | — | 32.2% | Not comparable |
| GDPval-AASource | — | 1144 | Not comparable |
CodingClaude Mythos 5 wins7 benchmarks
| Benchmark | Claude Mythos 5 | Muse Spark | Result |
|---|---|---|---|
| SWE-bench VerifiedSource | 95.5% | 77.4% | Claude Mythos 5 leads |
| SWE-bench ProSource | 80.3% | 52.4% | Claude Mythos 5 leads |
| Terminal-Bench 2.0Source | 88.0% | — | Not comparable |
| LiveCodeBench ProSource | — | 80.0% | Not comparable |
| Vibe Code BenchSource | — | 19.67% | Not comparable |
| AA Coding IndexSource | — | 58.6% | Not comparable |
| AA-SciCodeSource | — | 51.5% | Not comparable |
Reasoning3 benchmarks
KnowledgeClaude Mythos 5 wins12 benchmarks
| Benchmark | Claude Mythos 5 | Muse Spark | Result |
|---|---|---|---|
| GPQASource | 94.1% | — | Not comparable |
| HLESource | 64.5% | 50.4% | Claude Mythos 5 leads |
| HLE w/o toolsSource | 59% | 42.8% | Claude Mythos 5 leads |
| GPQA-DSource | — | 89.5% | Not comparable |
| HealthBench HardSource | — | 42.8% | Not comparable |
| MedXpertQA (Text)Source | — | 52.6% | Not comparable |
| Artificial Analysis Intelligence IndexSource | — | 43.1% | Not comparable |
| AA-GPQA DiamondSource | — | 88.4% | Not comparable |
| AA-HLESource | — | 39.9% | Not comparable |
| AA-Omniscience IndexSource | — | 4.1% | Not comparable |
| AA-Omniscience AccuracySource | — | 44.6% | Not comparable |
| AA-Omniscience Hallucination RateSource | — | 73.2% | Not comparable |
MathClaude Mythos 5 wins3 benchmarks
Multilingual1 benchmarks
| Benchmark | Claude Mythos 5 | Muse Spark | Result |
|---|---|---|---|
| SWE MultilingualSource | 92.2% | — | Not comparable |
MultimodalClaude Mythos 5 wins10 benchmarks
| Benchmark | Claude Mythos 5 | Muse Spark | Result |
|---|---|---|---|
| SWE-bench MultimodalSource | 54.9% | — | Not comparable |
| CharXivSource | 93.5% | 86.4% | Claude Mythos 5 leads |
| CharXiv w/o toolsSource | 88.9% | — | Not comparable |
| MMMU-ProSource | — | 80.4% | Not comparable |
| ERQASource | — | 64.7% | Not comparable |
| SimpleVQASource | — | 71.3% | Not comparable |
| ScreenSpot ProSource | — | 84.1% | Not comparable |
| ZeroBenchSource | — | 33.0% | Not comparable |
| MedXpertQA (MM)Source | — | 78.4% | Not comparable |
| AA-MMMU-ProSource | — | 80.5% | Not comparable |
Inst. Following1 benchmarks
| Benchmark | Claude Mythos 5 | Muse Spark | Result |
|---|---|---|---|
| AA-IFBenchSource | — | 75.9% | Not comparable |
Frequently Asked Questions (6)
Which is better, Claude Mythos 5 or Muse Spark?
Claude Mythos 5 is ahead on BenchLM's BenchAlign leaderboard, 83.93 to 71.04. The biggest single separator in this matchup is Terminal-Bench 2.0, where the scores are 88% and 59%.
Which is better for knowledge tasks, Claude Mythos 5 or Muse Spark?
Claude Mythos 5 has the edge for knowledge tasks in this comparison, averaging 68.5 versus 50.4. Inside this category, HLE w/o tools is the benchmark that creates the most daylight between them.
Which is better for coding, Claude Mythos 5 or Muse Spark?
Claude Mythos 5 has the edge for coding in this comparison, averaging 89.7 versus 67.8. Inside this category, SWE-bench Pro is the benchmark that creates the most daylight between them.
Which is better for math, Claude Mythos 5 or Muse Spark?
Claude Mythos 5 has the edge for math in this comparison, averaging 97.6 versus 32.9. Muse Spark stays close enough that the answer can still flip depending on your workload.
Which is better for agentic tasks, Claude Mythos 5 or Muse Spark?
Claude Mythos 5 has the edge for agentic tasks in this comparison, averaging 87 versus 59. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
Which is better for multimodal and grounded tasks, Claude Mythos 5 or Muse Spark?
Claude Mythos 5 has the edge for multimodal and grounded tasks in this comparison, averaging 93.5 versus 82.5. Inside this category, CharXiv is the benchmark that creates the most daylight between them.
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