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Claude Opus 5 vs Muse Spark

Full profiles: Claude Opus 5 (Anthropic) and Muse Spark (Meta): every benchmark, price and rank.

Updated · Data from 11 sources

As of 25 Oct 2026, Claude Opus 5 (max) is the better pick for most workloads: it leads on quality (68.8 vs 64.3 on the BenchLeader Index). Pick Claude Opus 5 for maths (71 vs 59); pick Muse Spark for agents & tools (66 vs 64).

Claude Opus 5 benchmarks max Anthropic Muse Spark benchmarks MetaOpen in the comparison tool

Which to pick for…

The pick's numbers come first. Category scores on the BenchLeader scale (50 is the average model, 15 points one standard deviation). High confidence means a lead of half a standard deviation or more; under one point is called either.

Use casePickWhyConfidence
CodingClaude Opus 570 vs 65 category score; SciCode 56.4% vs 51.5%Medium
Agents & tool useMuse Spark66 vs 64 category scoreMedium
MathsClaude Opus 571 vs 59 category score; Arena Maths 1517 vs 1467High
ReasoningClaude Opus 574 vs 65 category score; GPQA Diamond 93.9% vs 89.8%High
KnowledgeClaude Opus 572 vs 63 category score; AA-Omniscience 37.1 vs 7.2High
Long documentsEither65 vs 64 category score; AA-LCR 79.3% vs 78.0%Either
Images and other mediaClaude Opus 568 vs 65 category score; MMMU-Pro 84.7% vs 80.5%Medium
Chat quality (human preference)Either69 vs 68 on Arena votesEither
High volume on a budgetNeither flagshipA smaller model is usually the better fit: Cheapest good LLMs, Fastest LLMs–

Key differences

  • Claude Opus 5 (max) leads on quality: 68.8 vs 64.3.
  • Claude Opus 5 (max) is stronger in coding, composite, human preference, knowledge, long context, maths, multimodal, reasoning.
  • Muse Spark is stronger in agents & tools, instruction following.

At a glance

SpecClaude Opus 5Muse Spark
DeveloperAnthropicMeta
Released24 Jul 20268 Apr 2026
Context window (tokens)1,000,000262,144
Compared atClaude Opus 5 (max)Muse Spark
Open weightsNoNo
Price in / out / cached input per 1M$5.00 / $25.00 / $0.500–

Category by category

Category scores on the BenchLeader scale: 50 is the average evaluated model, 15 points is one standard deviation. A gap under one point is called level.

CategoryClaude Opus 5 (max)Muse SparkLeader
Reasoning74.165.3Claude Opus 5
Coding70.265.0Claude Opus 5
Agents & tools64.366.1Muse Spark
Maths70.659.1Claude Opus 5
Knowledge71.663.3Claude Opus 5
Instruction following–77.3not comparable
Human preference68.568.3level
Multimodal67.964.5Claude Opus 5
Long context64.764.0level
Composite86.364.5Claude Opus 5

Where sources disagree

Across the 20 benchmarks both have, Claude Opus 5 leads 18, Muse Spark leads 2. Every overall index that rates both puts Claude Opus 5 ahead.

Overall indexClaude Opus 5 (max)Muse SparkLeader
BenchLeader Index68.864.3Claude Opus 5
AA Intelligence Index v4.3.250.831.3Claude Opus 5
Arena Text14911489Claude Opus 5

Each publisher runs its own tasks, harnesses and effort settings, so their overall verdicts can differ; BenchLeader reconciles them on one scale. † measured at another effort setting of the same model (the publisher did not test the one compared here).

Price, speed and latency

List prices blended at three input tokens per output token. Per-task prices use the token counts on the methodology page; suite cost is what Artificial Analysis paid to run its whole Intelligence Index.

MeasureClaude Opus 5 (max)Muse Spark
Blended price per 1M tokens$10.00–
Input / output per 1M$5.00 / $25.00– / –
Cached input per 1M$0.500–
Price per task: chat reply$0.0095–
Price per task: summarize a 30-page report$0.075–
Price per task: code edit$0.068–
Price per task: agentic coding session$0.400–
Price per task: structured extraction$0.015–
Cost to run a full benchmark suite$5.86–
Output speed57 tok/s–
Time to first answer24.1 s–
Time to a complete answer32.9 s–

Each model is compared at its best-ranked reasoning-effort setting. Claude Opus 5 (max) scores 68.8 and takes 24 s to its first answer token; Claude Opus 5 (high) scores 67.9 in 10 s, Claude Opus 5 (xhigh) scores 67.4 in 25 s. Muse Spark scores 64.3. Higher effort means more thinking before the answer: better scores, longer waits and more tokens billed. How reasoning effort changes scores and cost.

Every benchmark

145 benchmarks, grouped by category; each name links to the board and its leaders. † measured at another effort setting of the same model, shown for reference and not counted as a win.

MetricPublisherClaude Opus 5 (max)Muse Spark
BenchLeader IndexBenchLeader68.864.3
Agents & tools scoreBenchLeader64.366.1
Coding scoreBenchLeader70.265.0
Composite scoreBenchLeader86.364.5
Human preference scoreBenchLeader68.568.3
Knowledge scoreBenchLeader71.663.3
Long context scoreBenchLeader64.764.0
Maths scoreBenchLeader70.659.1
Multimodal scoreBenchLeader67.964.5
Reasoning scoreBenchLeader74.165.3
Instruction following scoreBenchLeader–77.3
Blended price $/MBenchLeader$10.00–
Output speedBenchLeader57 tok/s–
Time to first answerBenchLeader24.1 s–
Context windowBenchLeader1,000,000 tokens262,144 tokens
Reasoning
GPQA DiamondEpoch AI Benchmarking Hub93.9%89.8%
Humanity's Last ExamScale AI / CAIS–40.6%
SimpleBenchSimpleBench80.6%†–
Arena Hard PromptsArena (LMArena)15151506
LiveBench 2.0 ReasoningLiveBench91.2%†–
LiveBench 1.0 ReasoningLiveBench91.2%–
GPQA Diamond (AA)Artificial Analysis93.2%88.4%
Humanity's Last Exam (AA)Artificial Analysis54.9%40.7%
GPQA Diamond (Vals)Vals AI93.4%†89.7%
ARC-AGI-1ARC Prize97.5%–
ARC-AGI-2ARC Prize90.4%–
ARC-AGI-3ARC Prize30.2%†–
CritPtArtificial Analysis29.1%11.3%
MysteryMechanismVals AI37.4%†–
Chess PuzzlesEpoch AI Benchmarking Hub43.0%–
Mystery Game PuzzlesEpoch AI Benchmarking Hub59.0%–
LMCAEpoch AI Benchmarking Hub63.3%–
DTBenchEpoch AI Benchmarking Hub97.6%–
ForecastBenchForecastBench66.5%–
BTF-3Epoch AI Benchmarking Hub12.0%†–
Coding
SciCodeSciCode56.4%51.5%
WeirdMLWeirdML91.8%–
FrontierCodeCognition53.4%–
Arena CodingArena (LMArena)15281529
Arena WebDevArena (LMArena)1691–
Show all 145 benchmarks
MetricPublisherClaude Opus 5 (max)Muse Spark
Coding
LiveBench 2.0 CodingLiveBench90.8%†–
LiveBench 1.0 CodingLiveBench81.5%–
SciCode (AA)Artificial Analysis56.4%–
LiveCodeBenchVals AI89.0%†–
IOIVals AI84.3%†–
SWE-bench (Vals)Vals AI97.0%†74.4%
SWE-Bench ProScale AI SEAL–55.0%
Code MigrationVals AI57.5%†–
ProgramBenchVals AI3.0%†–
Vibe Code Bench 1-100Vals AI28.5%†–
Vibe Code Bench v1.1Vals AI88.4%†19.7%
SWE-Bench Pro (private)Scale AI SEAL–55.0%
SWE Atlas: Codebase QnAScale AI SEAL63.2%†24.2%
SWE Atlas: Test WritingScale AI SEAL62.2%†31.1%
DeepSWE v1.1Epoch AI Benchmarking Hub73.7%–
CursorBenchCursor46.6%–
ALE-BenchEpoch AI Benchmarking Hub2164.6†–
FrontierSWEEpoch AI Benchmarking Hub52.0%–
Terminal-Bench 4.0 (AA)Artificial Analysis49.0%–
Terminal-Bench 2.1 (AA)Artificial Analysis89.1%62.2%
Startrise FrontendStartrise82.3%†–
Agents & tools
Terminal-BenchTerminal-Bench51.8%–
OSWorld-Verified 2.0OSWorld31.4%–
APEX-AgentsMercor65.8%–
Arena AgentArena (LMArena)8.2–
LiveBench Long AgenticLiveBench62.1%†–
LiveBench BrowserLiveBench84.0%†–
LiveBench Agentic CodingLiveBench65.2%–
Terminal-Bench HardArtificial Analysis–45.5%
τ²-Bench Telecom (AA)Artificial Analysis–91.5%
Terminal-Bench 2.1 (Vals)Vals AI84.6%†–
MCP AtlasScale AI SEAL85.8%†82.2%
HiL-BenchScale AI SEAL57.0%†–
τ³-bench Bankingτ²-bench48.7%–
τ³-Banking (AA)Artificial Analysis42.1%–
Analyst Agent (AA)Artificial Analysis53.8%–
CUA-benchVals AI9.0%–
CyberBenchVals AI65.4%†–
Finance Agent v2Vals AI58.6%†–
Harvey's Legal Agent Benchmark v1Vals AI6.7%†–
Legal Research BenchVals AI55.3%†–
SkillsBenchVals AI60.4%†–
SREBenchVals AI12.2%†–
Tax Agent BenchVals AI45.5%†–
Terminal-Bench 2.0 (Vals)Vals AI–59.5%
Terminal-Bench 4.0 (Vals)Vals AI53.5%†–
Terminal-Bench ScienceVals AI27.1%†–
Time Horizon Index: KSPVals AI18.8%†–
Arena SearchArena (LMArena)1214†–
BALROGBALROG63.4%–
PostTrainBenchEpoch AI Benchmarking Hub35.0%†–
GBAEvalEpoch AI Benchmarking Hub79.6%†–
Vending-Bench 2Andon Labs11181.9†–
AutomationBenchArtificial Analysis56.6%–
GDP.pdf (AA)Artificial Analysis21.6%–
EnterpriseOps-GymArtificial Analysis47.5%–
AA-Briefcase v1.1Artificial Analysis1657–
Terminal-Bench-Science 0.1 (AA)Artificial Analysis28.6%–
DeepSec-Bench (AA)Artificial Analysis25.9%–
FACTS SearchGoogle85.3%†–
Maths
FrontierMath Tiers 1–3Epoch AI Benchmarking Hub85.6%–
FrontierMath Tier 4Epoch AI Benchmarking Hub73.2%–
OTIS Mock AIMEEpoch AI Benchmarking Hub98.9%88.9%
ProofBenchVals AI99.0%17.0%
LiveBench MathematicsLiveBench95.7%–
AIME (Vals)Vals AI–96.9%
Arena MathsArena (LMArena)15171467
Knowledge
SimpleQA VerifiedEpoch AI Benchmarking Hub59.9%–
LiveBench 2.0 Data AnalysisLiveBench74.6%†–
LiveBench ResearchLiveBench88.9%†–
LiveBench 1.0 Data AnalysisLiveBench74.5%–
AA-OmniscienceArtificial Analysis37.17.2
MMLU-ProVals AI91.6%†87.3%
LegalBenchVals AI87.0%†84.2%
CorpFinVals AI73.2%†65.1%
TaxEvalVals AI75.1%†77.7%
PRBench FinanceScale AI SEAL–52.4%
PRBench LegalScale AI SEAL–52.3%
MultiNRCScale AI SEAL–59.0%
BioMysteryBenchVals AI79.3%†–
CaseLaw v2Vals AI–63.1%
Excel Modeling BenchmarkVals AI73.6%†–
MedCodeVals AI63.6%†51.3%
MedScribeVals AI91.0%†85.9%
Public Benefits Bench v1.1Vals AI76.9%†–
DrugDiscoveryBenchScale AI SEAL53.7%–
EBR-benchEpoch AI Benchmarking Hub45.7%–
GDP.pdfEpoch AI Benchmarking Hub24.0%–
AA-Omniscience: accuracyArtificial Analysis60.9%49.6%
AA-Omniscience: non-hallucinationArtificial Analysis39.2%15.8%
Instruction following
LiveBench LanguageLiveBench88.7%–
LiveBench Instruction FollowingLiveBench63.8%–
IFBenchArtificial Analysis–75.9%
MultiChallengeScale AI SEAL–75.5%
TutorBenchScale AI SEAL–68.5%
Arena Instruction FollowingArena (LMArena)14951465
Human preference
Arena TextArena (LMArena)14911489
EQ-Bench 4EQ-Bench1360†–
Arena Creative WritingArena (LMArena)14741464
Arena Multi-turnArena (LMArena)14871494
Arena Longer QueriesArena (LMArena)15031476
Multimodal
Arena VisionArena (LMArena)1320†1306
LiveBench DesignLiveBench83.0%†–
MMMU-ProArtificial Analysis84.7%80.5%
MMMU-Pro (official)MMMU–80.4%†
MMMU-Pro (Vals)Vals AI89.9%†87.4%
MortgageTaxVals AI72.1%†–
SAGEVals AI49.4%†–
Blueprint-Bench 2Epoch AI Benchmarking Hub30.4%†–
Long context
AA-LCRArtificial Analysis79.3%78.0%
Arena DocumentArena (LMArena)1490†1467
MLCRArtificial Analysis11.1%–
Composite
Epoch Capabilities IndexEpoch AI Benchmarking Hub163.9†152.0
LiveBench 2.0LiveBench82.1%†–
LiveBench 1.0LiveBench80.1%–
AA Intelligence Index v4.3.2Artificial Analysis50.831.3
Vals RSI IndexVals AI33.0%–
Vals Science IndexVals AI47.9%†–
Vals Multimodal IndexVals AI73.9%†–
Safety & honesty
FORTRESSScale AI SEAL16.8%†20.2%

Data as of 2026-10-25. Best configuration of each model; every score links to its source on the model pages.

What changed

  • Claude Opus 5 (max): 1 new result (Vals RSI Index).
  • Claude Opus 5 (max): 1 score revision.
  • Claude Opus 5 (max): 1 new result (ForecastBench); 1 score revision.
  • Claude Opus 5 (max): BenchLeader Index 68.3 → 68.9.
  • Claude Opus 5 (max): 4 new results (GDPval-AA v2.1, AA-Omniscience: accuracy, AA-Omniscience: non-hallucination…).
  • Claude Opus 5 (max): 1 score revision.
  • Claude Opus 5 (max): 2 score revisions.
  • Muse Spark: 1 new result (PRBench Legal).
  • Claude Opus 5 (max): 2 new results (Terminal-Bench-Science 0.1 (AA), DeepSec-Bench (AA)).
  • Muse Spark: 1 new result (SWE Atlas: Codebase QnA).

Rankings: Best LLM overall · Best LLM for coding · Best LLM for agents · Best cheap LLMs

Claude Opus 5 vs Muse Spark: questions

Is Claude Opus 5 better than Muse Spark?
Claude Opus 5 (max) leads on quality: 68.8 vs 64.3. The BenchLeader Index combines every independent quality benchmark; Claude Opus 5 (max) is ahead overall as of 2026-10-25, but check the category scores for your use.
Is Claude Opus 5 better than Muse Spark for coding?
Claude Opus 5 scores higher in coding (70 vs 65 on the category index, where 50 is average). On SciCode, the top shared coding benchmark, it is 56.4% for Claude Opus 5 against 51.5% for Muse Spark.
Is Claude Opus 5 better than Muse Spark for agents and tool use?
Muse Spark scores higher in agentic tasks (66 vs 64 on the category index, where 50 is average).
Which is better for long documents?
They are level on long-context benchmarks (65 vs 64). Claude Opus 5 accepts more context: 1,000,000 against 262,144 tokens for Muse Spark.
Do independent benchmarks agree on Claude Opus 5 vs Muse Spark?
Across the 20 benchmarks both have, Claude Opus 5 leads 18, Muse Spark leads 2. Every overall index that rates both puts Claude Opus 5 ahead.
When was Claude Opus 5 released?
Claude Opus 5 was released on 24 Jul 2026.