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Head-to-head comparison

Claude Opus 5 vs. Muse Wonder

Compare published benchmark results from matching versions and cohorts, API pricing, and technical specifications. Any documented test setup differences remain visible.

shared result series
189
distinct benchmarks
19
latest retrieval
2026-10-15

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Specifications

General specifications

Release date, availability, context window, architecture, and published parameter counts at a glance. Undisclosed details remain marked as unavailable.

Specifications for Claude Opus 5 and Muse Wonder
AttributeClaude Opus 5Muse Wonder
ProviderAnthropicMeta
ReleasedJul 24, 2026Oct 12, 2026
AvailabilityActivePreview
Model typeProprietaryProprietary
ParametersNot publishedNot published
ArchitectureNot publishedNot published
Context window1,000,000 tokens1,048,576 tokens
Knowledge cutoffMay 2026Not published
Technical sourcesModel, Knowledge cutoffModel, Context

Pricing

API pricing compared

The table compares official standard API rates per 1M tokens, including published cache pricing. Batch, fast, priority, regional surcharges, tool calls, and cloud platform pricing are excluded.

API pricing for Claude Opus 5 and Muse Wonder
Price typeClaude Opus 5Muse Wonder
API input$5$4
API output$25$20
Cache read$0.5$0.2
Cache write (5 min.)$6.25Not listed
Cache write (1 hr.)$10Not listed
Price verified09/22/2026 Source10/15/2026 Source
Claude Opus 5Muse Wonder
API inputUSD per 1M tokens, base tier
Claude Opus 5$5
Muse WonderLower price$4
API outputUSD per 1M tokens, base tier
Claude Opus 5$25
Muse WonderLower price$20
Cache readUSD per 1M tokens, base tier
Claude Opus 5$0.5
Muse WonderLower price$0.2

Key to the marks:better valuebetter, but not conclusivetie

Pricing by provider

Direct developer pricing and provider endpoint tariffs routed through OpenRouter are listed separately. Prices are in USD per 1M tokens. Context-dependent direct tiers plus regional, Flex, Priority, and other OpenRouter tariffs remain individually identifiable.

No provider tariff for Muse Wonder is available in the stored OpenRouter snapshot. The official direct price is still shown.

Provider pricing for Claude Opus 5 and Muse Wonder
ModelProviderPurchase route and tariffInput per 1M tokensOutput per 1M tokensSource
Claude Opus 5AnthropicDirect from developerStandard APILowest listed price: $5Lowest listed price: $25Source09/22/2026
Amazon BedrockVia OpenRouteramazon-bedrockLowest listed price: $5Lowest listed price: $25Source10/16/2026
Amazon BedrockVia OpenRouteramazon-bedrock/eu-west-1$5.5$27.5Source10/16/2026
Amazon BedrockVia OpenRouteramazon-bedrock/us-east-1$5.5$27.5Source10/16/2026
AnthropicVia OpenRouteranthropicLowest listed price: $5Lowest listed price: $25Source10/16/2026
AnthropicVia OpenRouteranthropic/fast$10$50Source10/16/2026
AzureVia OpenRouterazure/globalLowest listed price: $5Lowest listed price: $25Source10/16/2026
AzureVia OpenRouterazure/us$5.5$27.5Source10/16/2026
Claude Platform on AWSVia OpenRouterclaude-on-awsLowest listed price: $5Lowest listed price: $25Source10/16/2026
GoogleVia OpenRoutergoogle-vertex/europe$5.5$27.5Source10/16/2026
GoogleVia OpenRoutergoogle-vertex/globalLowest listed price: $5Lowest listed price: $25Source10/16/2026
GoogleVia OpenRoutergoogle-vertex/us$5.5$27.5Source10/16/2026
Muse WonderMetaDirect from developerStandard APILowest listed price: $4Lowest listed price: $20Source10/15/2026

Performance

Shared benchmarks

Only published results with the same benchmark version, task, metric, and comparison cohort are paired. Different reasoning levels, agents, harnesses, or output limits appear directly in the table.

Capability profile from matched benchmarks

Each axis averages directly matched benchmark families. A value of 100 means the stronger value within this pair, not a universal quality score.

255075100CodingReasoningKnowledgeFinanceGeneral
Claude Opus 5
Muse Wonder
Coding: 98.8 / 98.9 (2 benchmark families)
Reasoning: 99.3 / 99.6 (1 benchmark family)
Knowledge: 99.8 / 100 (1 benchmark family)
Finance: 98.9 / 100 (1 benchmark family)
General: 98.4 / 100 (1 benchmark family)

22 matched rows from 2 benchmark families were considered. The radar shows 5 of 5 comparable categories.

Claude Opus 5Muse Wonder
BioMysteryBenchOverall. Higher is better. Test setup not documented as identical
Claude Opus 5Higher measured value79.259 %
Muse Wonder67.037 %
Code MigrationOverall. Higher is better. Test setup not documented as identical
Claude Opus 557.473 %
Muse WonderHigher measured value62.552 %
CyberBench v1.1Overall. Higher is better. Test setup not documented as identical
Claude Opus 565.357 %
Muse WonderHigher measured value80.357 %
EMBOverall. Higher is better. Test setup not documented as identical
Claude Opus 5Higher measured value73.556 %
Muse Wonder67.084 %
Finance Agent (v2)Overall. Higher is better. Test setup not documented as identical
Claude Opus 5Higher measured value58.633 %
Muse Wonder56.637 %
Harvey's Legal Agent BenchmarkOverall · Task fully resolved. Higher is better. Test setup not documented as identical
Claude Opus 56.667 %
Muse WonderHigher measured value17.083 %
IOIOverall. Higher is better. Test setup not documented as identical
Claude Opus 5Higher measured value84.333 %
Muse Wonder66.944 %
Legal Research BenchOverall · All-pass. Higher is better. Test setup not documented as identical
Claude Opus 5Higher measured value55.288 %
Muse Wonder50.481 %
LMArena Code Arena WebDevOverall. Higher is better. Test setup not documented as identical
Claude Opus 5Higher measured value1,657.837
Muse Wonder1,650.947
LMArena Text, Style ControlOverall. Higher is better. Test setup not documented as identical
Claude Opus 51,489.847
Muse WonderHigher measured value1,512.671
MysteryMechanismOverall. Higher is better. Test setup not documented as identical
Claude Opus 5Higher measured value37.387 %
Muse Wonder27.477 %
ProofBenchOverall. Higher is better. Test setup not documented as identical
Claude Opus 5Higher measured value99 %
Muse Wonder84 %

Key to the marks:better valuebetter, but not conclusivetie

Benchmark scores for Claude Opus 5 and Muse Wonder
Benchmark and taskClaude Opus 5Muse WonderSource
BioMysteryBenchOverall
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Harness: Terminus 2, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Harness: Terminus 2, Temperature: 1, Output limit: 131,072 tokens
Higher measured value79.259 %
67.037 %
Vals AI
Source details
Data as of: 10/12/2026
Code MigrationOverall
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
57.473 %
Higher measured value62.552 %
Vals AI
Source details
Data as of: 10/12/2026
CyberBench v1.1Overall
Test details
Test setup not documented as identicalNo direct winnerVersion: 1.1Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
65.357 %
Higher measured value80.357 %
Vals AI
Source details
Data as of: 10/12/2026
EMBOverall
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value73.556 %
67.084 %
Vals AI
Source details
Data as of: 10/12/2026
Finance Agent (v2)Overall
Test details
Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value58.633 %
56.637 %
Vals AI
Source details
Data as of: 10/12/2026
Harvey's Legal Agent BenchmarkOverall · Task fully resolved
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: task resolution rateScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
6.667 %
Higher measured value17.083 %
Vals AI
Source details
Data as of: 10/12/2026
IOIOverall
Test details
Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value84.333 %
66.944 %
Vals AI
Source details
Data as of: 10/14/2026
Legal Research BenchOverall · All-pass
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: all-pass rateScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value55.288 %
50.481 %
Vals AI
Source details
Data as of: 10/12/2026
LMArena Code Arena WebDevOverall
Test details
Test setup not documented as identicalNo direct winnerVersion: webdevMetric: WebDev Arena Bradley-Terry ratingScoring: Higher is betterClaude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena Code Arena WebDev
Muse Wonder: Snapshot: muse-wonder-max, Reasoning: max, Harness: Arena Code Arena WebDev
Claude Opus 5: Arena rating from 23,519 published pairwise votes.Muse Wonder: Arena rating from 1,228 published pairwise votes.
Higher measured value1,657.837
95% confidence interval: ±5.533The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.
1,650.947
95% confidence interval: ±18.263The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.
LMArena
Source details
Data as of: 10/13/2026
LMArena Text, Style ControlOverall
Test details
Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterClaude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena Text, style control
Muse Wonder: Snapshot: muse-wonder-max, Reasoning: max, Harness: Arena Text, style control
Claude Opus 5: Arena rating from 65,663 published pairwise votes.Muse Wonder: Arena rating from 1,944 published pairwise votes.
1,489.847
95% confidence interval: ±3.689The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.
Higher measured value1,512.671
95% confidence interval: ±13.236The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.
LMArena
Source details
Data as of: 10/13/2026
MysteryMechanismOverall
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value37.387 %
27.477 %
Vals AI
Source details
Data as of: 10/12/2026
ProofBenchOverall
Test details
Test setup not documented as identicalNo direct winnerVersion: 1.1Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value99 %
84 %
Vals AI
Source details
Data as of: 10/12/2026
Public Benefits Bench v1.1Overall
Test details
Test setup not documented as identicalNo direct winnerVersion: 1.1Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value76.928 %
70.23 %
Vals AI
Source details
Data as of: 10/12/2026
Tax Agent BenchOverall
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value45.548 %
36.269 %
Vals AI
Source details
Data as of: 10/12/2026
Terminal-Bench 4.0Overall
Test details
Test setup not documented as identicalNo direct winnerVersion: 4.0Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value53.535 %
49.495 %
Vals AI
Source details
Data as of: 10/13/2026
Terminal-Bench ScienceOverall
Test details
Test setup not documented as identicalNo direct winnerVersion: 0.1Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Harness: Mini-SWE-agent, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Harness: Mini-SWE-agent, Temperature: 1, Output limit: 131,072 tokens
Higher measured value27.143 %
22.857 %
Vals AI
Source details
Data as of: 10/14/2026
Vals IndexOverall
Test details
Test setup not documented as identicalNo direct winnerVersion: 2.1Metric: weighted index scoreScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value63.674 %
61.062 %
Vals AI
Source details
Data as of: 10/13/2026
Vibe Code Bench 1-100Overall
Test details
Test setup not documented as identicalNo direct winnerVersion: 1.0Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Harness: OpenHands, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Harness: OpenHands, Temperature: 1, Output limit: 131,072 tokens
Higher measured value28.533 %
26.55 %
Vals AI
Source details
Data as of: 10/14/2026
Vibe Code Bench v1.1Overall
Test details
Test setup not documented as identicalNo direct winnerVersion: 1.1Metric: accuracyScoring: Higher is betterClaude Opus 5: Harness: OpenHands
Muse Wonder: Reasoning: max, Harness: OpenHands, Temperature: 1, Output limit: 131,072 tokens
Higher measured value88.404 %
83.089 %
Vals AI
Source details
Data as of: 10/12/2026
BioMysteryBenchHard
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Harness: Terminus 2, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Harness: Terminus 2, Temperature: 1, Output limit: 131,072 tokens
Higher measured value43.137 %
29.412 %
Vals AI
Source details
Data as of: 10/12/2026
Code MigrationCLI
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
53.297 %
Higher measured value60.07 %
Vals AI
Source details
Data as of: 10/12/2026
CyberBench v1.1Patch
Test details
Test setup not documented as identicalNo direct winnerVersion: 1.1Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
No direct winner85.714 %
No direct winner85.714 %
Vals AI
Source details
Data as of: 10/12/2026
EMBComps
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
75.171 %
Higher measured value79.488 %
Vals AI
Source details
Data as of: 10/12/2026
Finance Agent (v2)Adjustments
Test details
Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value54.617 %
52.67 %
Vals AI
Source details
Data as of: 10/12/2026
Harvey's Legal Agent BenchmarkAntitrust Competition · Criteria passed
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: criteria pass rateScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
87.319 %
Higher measured value93.841 %
Vals AI
Source details
Data as of: 10/12/2026
IOIIOI 2024
Test details
Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value100 %
66.833 %
Vals AI
Source details
Data as of: 10/14/2026
Legal Research BenchAdministrative / Regulatory · All-pass
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: all-pass rateScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value65.152 %
63.636 %
Vals AI
Source details
Data as of: 10/12/2026
LMArena Code Arena WebDevOverall
Test details
No documented difference in the test setupVersion: webdevMetric: WebDev Arena Bradley-Terry ratingScoring: Higher is betterClaude Opus 5: Snapshot: claude-opus-5-max, Reasoning: max, Harness: Arena Code Arena WebDev
Muse Wonder: Snapshot: muse-wonder-max, Reasoning: max, Harness: Arena Code Arena WebDev
Claude Opus 5: Arena rating from 17,934 published pairwise votes.Muse Wonder: Arena rating from 1,228 published pairwise votes.
Winner1,689.967
95% confidence interval: ±6.28The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.
1,650.947
95% confidence interval: ±18.263The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.
LMArena
Source details
Data as of: 10/13/2026
LMArena Text, Style ControlOverall
Test details
No documented difference in the test setupVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterClaude Opus 5: Snapshot: claude-opus-5-max, Reasoning: max, Harness: Arena Text, style control
Muse Wonder: Snapshot: muse-wonder-max, Reasoning: max, Harness: Arena Text, style control
Claude Opus 5: Arena rating from 31,907 published pairwise votes.Muse Wonder: Arena rating from 1,944 published pairwise votes.
1,489.524
95% confidence interval: ±4.846The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.
Winner1,512.671
95% confidence interval: ±13.236The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.
LMArena
Source details
Data as of: 10/13/2026
Tax Agent BenchControversy & Precedence Analysis
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value23.295 %
20 %
Vals AI
Source details
Data as of: 10/12/2026
Terminal-Bench 4.0Hardware
Test details
Test setup not documented as identicalNo direct winnerVersion: 4.0Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
33.333 %
Higher measured value46.667 %
Vals AI
Source details
Data as of: 10/13/2026
Terminal-Bench ScienceEarth Sciences
Test details
Test setup not documented as identicalNo direct winnerVersion: 0.1Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Harness: Mini-SWE-agent, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Harness: Mini-SWE-agent, Temperature: 1, Output limit: 131,072 tokens
12.5 %
Higher measured value50 %
Vals AI
Source details
Data as of: 10/14/2026
Vals IndexCode Migration
Test details
Test setup not documented as identicalNo direct winnerVersion: 2.1Metric: benchmark scoreScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
56.68 %
Higher measured value62.009 %
Vals AI
Source details
Data as of: 10/13/2026
BioMysteryBenchHuman-solvable
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Harness: Terminus 2, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Harness: Terminus 2, Temperature: 1, Output limit: 131,072 tokens
Higher measured value87.671 %
75.799 %
Vals AI
Source details
Data as of: 10/12/2026
Code MigrationCOBOL
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
No direct winner70 %
No direct winner70 %
Vals AI
Source details
Data as of: 10/12/2026
CyberBench v1.1PoC
Test details
Test setup not documented as identicalNo direct winnerVersion: 1.1Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
45 %
Higher measured value75 %
Vals AI
Source details
Data as of: 10/12/2026
EMBDataroom
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value87.681 %
79.232 %
Vals AI
Source details
Data as of: 10/12/2026
Finance Agent (v2)All-Pass
Test details
Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value47.708 %
45.936 %
Vals AI
Source details
Data as of: 10/12/2026
Harvey's Legal Agent BenchmarkAntitrust Competition · Task fully resolved
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: task resolution rateScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
0 %
Higher measured value20 %
Vals AI
Source details
Data as of: 10/12/2026
IOIIOI 2025
Test details
Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value87.167 %
75.5 %
Vals AI
Source details
Data as of: 10/14/2026
Legal Research BenchAdministrative / Regulatory · Weighted partial credit
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: weighted partial-credit scoreScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value92.676 %
90.571 %
Vals AI
Source details
Data as of: 10/12/2026
LMArena Code Arena WebDevWebdev
Test details
Test setup not documented as identicalNo direct winnerVersion: webdevMetric: WebDev Arena Bradley-Terry ratingScoring: Higher is betterClaude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena Code Arena WebDev
Muse Wonder: Snapshot: muse-wonder-max, Reasoning: max, Harness: Arena Code Arena WebDev
Claude Opus 5: Arena rating from 23,519 published pairwise votes.Muse Wonder: Arena rating from 1,228 published pairwise votes.
Higher measured value1,657.837
95% confidence interval: ±5.533The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.
1,650.947
95% confidence interval: ±18.263The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.
LMArena
Source details
Data as of: 10/13/2026
LMArena Text, Style ControlBusiness, management and finance
Test details
Test setup not documented as identicalNo direct winnerVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterClaude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena Text, style control
Muse Wonder: Snapshot: muse-wonder-max, Reasoning: max, Harness: Arena Text, style control
Claude Opus 5: Arena rating from 12,397 published pairwise votes.Muse Wonder: Arena rating from 338 published pairwise votes.
1,485.352
95% confidence interval: ±6.638The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.
Higher measured value1,500.247
95% confidence interval: ±30.856The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.
LMArena
Source details
Data as of: 10/13/2026
Tax Agent BenchControversy & Precedence Analysis
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
70.021 %
Higher measured value71.362 %
Vals AI
Source details
Data as of: 10/12/2026
Terminal-Bench 4.0Media
Test details
Test setup not documented as identicalNo direct winnerVersion: 4.0Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value58.333 %
33.333 %
Vals AI
Source details
Data as of: 10/13/2026
Terminal-Bench ScienceEngineering Sciences
Test details
Test setup not documented as identicalNo direct winnerVersion: 0.1Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Harness: Mini-SWE-agent, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Harness: Mini-SWE-agent, Temperature: 1, Output limit: 131,072 tokens
Higher measured value11.111 %
0 %
Vals AI
Source details
Data as of: 10/14/2026
Vals IndexEMB
Test details
Test setup not documented as identicalNo direct winnerVersion: 2.1Metric: benchmark scoreScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value73.556 %
67.084 %
Vals AI
Source details
Data as of: 10/13/2026
Code MigrationCode Quality
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: mean reviewer code-quality ratingScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value4.75 / 5
4.061 / 5
Vals AI
Source details
Data as of: 10/12/2026
EMBDCF
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value70.018 %
51.035 %
Vals AI
Source details
Data as of: 10/12/2026
Finance Agent (v2)Comparables
Test details
Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
47.42 %
Higher measured value47.933 %
Vals AI
Source details
Data as of: 10/12/2026
Harvey's Legal Agent BenchmarkArbitration International Dispute Resolution · Criteria passed
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: criteria pass rateScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
90.323 %
Higher measured value92.473 %
Vals AI
Source details
Data as of: 10/12/2026
IOIIOI 2026
Test details
Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value65.833 %
58.5 %
Vals AI
Source details
Data as of: 10/14/2026
Legal Research BenchBusiness & Commercial · All-pass
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: all-pass rateScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value62.791 %
48.837 %
Vals AI
Source details
Data as of: 10/12/2026
LMArena Code Arena WebDevWebdev
Test details
No documented difference in the test setupVersion: webdevMetric: WebDev Arena Bradley-Terry ratingScoring: Higher is betterClaude Opus 5: Snapshot: claude-opus-5-max, Reasoning: max, Harness: Arena Code Arena WebDev
Muse Wonder: Snapshot: muse-wonder-max, Reasoning: max, Harness: Arena Code Arena WebDev
Claude Opus 5: Arena rating from 17,934 published pairwise votes.Muse Wonder: Arena rating from 1,228 published pairwise votes.
Winner1,689.967
95% confidence interval: ±6.28The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.
1,650.947
95% confidence interval: ±18.263The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.
LMArena
Source details
Data as of: 10/13/2026
LMArena Text, Style ControlBusiness, management and finance
Test details
No documented difference in the test setupNo clear leadVersion: style-control-v1Metric: style-controlled Bradley-Terry ratingScoring: Higher is betterClaude Opus 5: Snapshot: claude-opus-5-max, Reasoning: max, Harness: Arena Text, style control
Muse Wonder: Snapshot: muse-wonder-max, Reasoning: max, Harness: Arena Text, style control
Claude Opus 5: Arena rating from 5,959 published pairwise votes.Muse Wonder: Arena rating from 338 published pairwise votes.
1,484.122
95% confidence interval: ±8.561The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.
No clear lead1,500.247
95% confidence interval: ±30.856The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.
LMArena
Source details
Data as of: 10/13/2026
Tax Agent BenchCurrent & Temporal Analysis
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
49.879 %
Higher measured value50 %
Vals AI
Source details
Data as of: 10/12/2026
Terminal-Bench 4.0ML
Test details
Test setup not documented as identicalNo direct winnerVersion: 4.0Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value72.727 %
45.455 %
Vals AI
Source details
Data as of: 10/13/2026
Terminal-Bench ScienceLife Sciences
Test details
Test setup not documented as identicalNo direct winnerVersion: 0.1Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Harness: Mini-SWE-agent, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Harness: Mini-SWE-agent, Temperature: 1, Output limit: 131,072 tokens
Higher measured value31.579 %
21.053 %
Vals AI
Source details
Data as of: 10/14/2026
Vals IndexFinance Agent v2
Test details
Test setup not documented as identicalNo direct winnerVersion: 2.1Metric: benchmark scoreScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value58.633 %
56.637 %
Vals AI
Source details
Data as of: 10/13/2026
EMBLBO
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value61.154 %
60.69 %
Vals AI
Source details
Data as of: 10/12/2026
Finance Agent (v2)Disclosure Analysis
Test details
Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value71.25 %
67.252 %
Vals AI
Source details
Data as of: 10/12/2026
Harvey's Legal Agent BenchmarkArbitration International Dispute Resolution · Task fully resolved
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: task resolution rateScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
No direct winner0 %
No direct winner0 %
Vals AI
Source details
Data as of: 10/12/2026
Legal Research BenchBusiness & Commercial · Weighted partial credit
Test details
Test setup not documented as identicalNo direct winnerVersion: 1Metric: weighted partial-credit scoreScoring: Higher is betterClaude Opus 5: Compute: max, Temperature: 1, Output limit: 128,000 tokens
Muse Wonder: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens
Higher measured value92.246 %
86.88 %
Vals AI
Source details
Data as of: 10/12/2026
LMArena Code Arena WebDevWebdev-html
Test details
Test setup not documented as identicalNo direct winnerVersion: webdevMetric: WebDev Arena Bradley-Terry ratingScoring: Higher is betterClaude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena Code Arena WebDev
Muse Wonder: Snapshot: muse-wonder-max, Reasoning: max, Harness: Arena Code Arena WebDev
Claude Opus 5: Arena rating from 3,275 published pairwise votes.Muse Wonder: Arena rating from 158 published pairwise votes.
1,652.09
95% confidence interval: ±12.247The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.
Higher measured value1,721.908
95% confidence interval: ±51.47The Arena score measures human preference rather than a fixed capability test. The confidence interval, Arena category, and model configuration are part of the result.
LMArena
Source details
Data as of: 10/13/2026

Key to the marks:better valuebetter, but not conclusivetie

Our model tests

Our tests

There is no shared test round for this selection. Results from different rounds are not mixed.

Earlier tests

Pelican on a bicycle

A community classic for free-form SVG drawing.

Claude Opus 5

Claude Opus 5: Pelican on a bicycle
A community classic for free-form SVG drawing.

Reasoning (requested): high

Current attempt
Run date
Oct 1, 2026
API provider
openrouter
Requested API model
anthropic/claude-opus-5
API model reported in response
anthropic/claude-opus-5
Reasoning setting
high
Pinned endpoint
Anthropic | anthropic/claude-opus-5-20260723
Temperature
Provider default
Token limit including reasoning
8,192 tokens
Test protocol
community-visual-tests-v1
Technical checks
Passed, not a quality rating
Response time
63 s

Visually reviewed. This individual test does not establish overall model quality.

Earlier attempts (1)
  • Sep 7, 2026API request failedReasoning setting: high

Muse Wonder

Not tested yet

Prompt and test conditions

Generate an SVG of a pelican riding a bicycle

Token limit including reasoning: 8,192 tokens

Task origin (Simon Willison)

How to read this comparison

Winning one benchmark is not an overall verdict

Your workload, budget, and required context length matter most. A coding benchmark says little about visual understanding or agent performance.

The standard price table uses direct developer rates. The provider comparison labels OpenRouter endpoints, regions, and special tariffs separately.

Every result links to its measurement source and retrieval date. Labels distinguish vendor reports, official benchmark leaderboards, and independent evaluations. Disputed or archived results are excluded.

More matchups

Compare Claude Opus 5 and Muse Wonder with other leading models using the same data and benchmark logic.

View the complete LLM comparison