Head-to-head comparison

Claude Opus 4.8 vs. Muse Wonder Full

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

shared result series: 144
distinct benchmarks: 15
latest retrieval: 2026-10-15

First modelSecond model

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 4.8 and Muse Wonder Full
Attribute	Claude Opus 4.8	Muse Wonder Full
Provider	Anthropic	Meta
Released	May 2026	Oct 12, 2026
Availability	Legacy	Subscription only
Model type	Proprietary	Proprietary
Parameters	Not published	Not published
Architecture	Not published	Not published
Context window	1,000,000 tokens	1M tokens
Knowledge cutoff	January 2026	Not published
Technical sources	Model, Knowledge cutoff	Model, 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 4.8 and Muse Wonder Full
Price type	Claude Opus 4.8	Muse Wonder Full
API input	$5	—
API output	$25	—
Cache read	$0.5	Not listed
Cache write (5 min.)	$6.25	Not listed
Cache write (1 hr.)	$10	Not listed
Price verified	09/22/2026 Source	10/15/2026

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 Claude Opus 4.8 is available in the stored OpenRouter snapshot. The official direct price is still shown.

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

Provider pricing for Claude Opus 4.8 and Muse Wonder Full
Model	Provider	Purchase route and tariff	Input per 1M tokens	Output per 1M tokens	Source
Claude Opus 4.8	Anthropic	Direct from developerStandard API	Lowest listed price: $5	Lowest listed price: $25	Source09/22/2026

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.

Not enough directly matched categories for a reliable radar

Only 0 of at least 5 categories have comparable, direct model measurements. The benchmark tables below show the available evidence without filling missing axes.

Claude Opus 4.8Muse Wonder Full

Code MigrationOverall. Higher is better. Test setup not documented as identical

Claude Opus 4.847.25 %

Muse Wonder Full61.033 %

EMBOverall. Higher is better. Test setup not documented as identical

Claude Opus 4.869.373 %

Muse Wonder Full71.917 %

Finance Agent (v2)Overall. Higher is better. Test setup not documented as identical

Claude Opus 4.853.918 %

Muse Wonder Full59.061 %

Harvey's Legal Agent BenchmarkOverall · Task fully resolved. Higher is better. Test setup not documented as identical

Claude Opus 4.89.583 %

Muse Wonder Full21.667 %

Legal Research BenchOverall · All-pass. Higher is better. Test setup not documented as identical

Claude Opus 4.843.75 %

Muse Wonder Full53.365 %

LegalBenchOverall. Higher is better. Test setup not documented as identical

Claude Opus 4.883.568 %

Muse Wonder Full87.418 %

MedCodeOverall. Higher is better. Test setup not documented as identical

Claude Opus 4.853.217 %

Muse Wonder Full49.932 %

MedScribeOverall. Higher is better. Test setup not documented as identical

Claude Opus 4.885.755 %

Muse Wonder Full89.335 %

ProgramBenchOverall. Higher is better. Test setup not documented as identical

Claude Opus 4.81 %

Muse Wonder Full0.5 %

Public Benefits Bench v1.1Overall. Higher is better. Test setup not documented as identical

Claude Opus 4.868.133 %

Muse Wonder Full73.748 %

Tax Agent BenchOverall. Higher is better. Test setup not documented as identical

Claude Opus 4.829.999 %

Muse Wonder Full42.997 %

Terminal-Bench 4.0Overall. Higher is better. Test setup not documented as identical

Claude Opus 4.823.232 %

Muse Wonder Full58.081 %

Key to the marks:better valuebetter, but not conclusivetie

Benchmark scores for Claude Opus 4.8 and Muse Wonder Full
Benchmark and task	Claude Opus 4.8	Muse Wonder Full	Source
Code MigrationOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	47.25 %	Higher measured value61.033 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	69.373 %	Higher measured value71.917 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	53.918 %	Higher measured value59.061 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	9.583 %	Higher measured value21.667 %	Vals AI Source details Data as of: 10/12/2026
Legal Research BenchOverall · All-pass Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: all-pass rateScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	43.75 %	Higher measured value53.365 %	Vals AI Source details Data as of: 10/12/2026
LegalBenchOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	83.568 %	Higher measured value87.418 %	Vals AI Source details Data as of: 10/13/2026
MedCodeOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 30,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	Higher measured value53.217 %	49.932 %	Vals AI Source details Data as of: 10/13/2026
MedScribeOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 30,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	85.755 %	Higher measured value89.335 %	Vals AI Source details Data as of: 10/13/2026
ProgramBenchOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: fully resolved rateScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	Higher measured value1 %	0.5 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	68.133 %	Higher measured value73.748 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	29.999 %	Higher measured value42.997 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	23.232 %	Higher measured value58.081 %	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 4.8: Compute: max, Harness: Mini-SWE-agent, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Harness: Mini-SWE-agent, Temperature: 1, Output limit: 131,072 tokens	4.286 %	Higher measured value37.143 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	55.1 %	Higher measured value64.566 %	Vals AI Source details Data as of: 10/13/2026
Vibe Code Bench v1.1Overall Test details Test setup not documented as identicalNo direct winnerVersion: 1.1Metric: accuracyScoring: Higher is betterClaude Opus 4.8: Compute: max, Harness: OpenHands, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Harness: OpenHands, Temperature: 1, Output limit: 131,072 tokens	82.725 %	Higher measured value85.996 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	40.143 %	Higher measured value58.044 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	72.797 %	Higher measured value80.89 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	48.387 %	Higher measured value56.668 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	87.319 %	Higher measured value94.928 %	Vals AI Source details Data as of: 10/12/2026
Legal Research BenchAdministrative / Regulatory · All-pass Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: all-pass rateScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	43.939 %	Higher measured value63.636 %	Vals AI Source details Data as of: 10/12/2026
LegalBenchConclusion Tasks Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	88.937 %	Higher measured value90.323 %	Vals AI Source details Data as of: 10/13/2026
ProgramBenchAlmost Resolved Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: almost-resolved rateScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	Higher measured value15.5 %	8 %	Vals AI Source details Data as of: 10/12/2026
Tax Agent BenchControversy & Precedence Analysis Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	13.133 %	Higher measured value26.667 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	26.667 %	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 4.8: Compute: max, Harness: Mini-SWE-agent, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Harness: Mini-SWE-agent, Temperature: 1, Output limit: 131,072 tokens	0 %	Higher measured value62.5 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	46.942 %	Higher measured value60.256 %	Vals AI Source details Data as of: 10/13/2026
Code MigrationCOBOL Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	68.571 %	Higher measured value70 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	Higher measured value85.948 %	85.257 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	43.517 %	Higher measured value49.037 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	0 %	Higher measured value20 %	Vals AI Source details Data as of: 10/12/2026
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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	87.365 %	Higher measured value92.809 %	Vals AI Source details Data as of: 10/12/2026
LegalBenchInterpretation Tasks Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	82.703 %	Higher measured value84.991 %	Vals AI Source details Data as of: 10/13/2026
ProgramBenchFully Resolved Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: fully resolved rateScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	Higher measured value1 %	0.5 %	Vals AI Source details Data as of: 10/12/2026
Tax Agent BenchControversy & Precedence Analysis Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	58.743 %	Higher measured value76.097 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	0 %	Higher measured value58.333 %	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 4.8: Compute: max, Harness: Mini-SWE-agent, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Harness: Mini-SWE-agent, Temperature: 1, Output limit: 131,072 tokens	0 %	Higher measured value11.111 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	69.373 %	Higher measured value71.917 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	Higher measured value4.7 / 5	4.244 / 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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	66.334 %	Higher measured value66.579 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	44.853 %	Higher measured value46.809 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	88.172 %	Higher measured value95.699 %	Vals AI Source details Data as of: 10/12/2026
Legal Research BenchBusiness & Commercial · All-pass Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: all-pass rateScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	41.86 %	Higher measured value58.14 %	Vals AI Source details Data as of: 10/12/2026
LegalBenchIssue Tasks Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	87.834 %	Higher measured value91.014 %	Vals AI Source details Data as of: 10/13/2026
ProgramBenchRaw Pass Rate Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: raw test pass rateScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	Higher measured value71.945 %	24.187 %	Vals AI Source details Data as of: 10/12/2026
Tax Agent BenchCurrent & Temporal Analysis Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	46.524 %	Higher measured value56.614 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	27.273 %	Higher measured value66.667 %	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 4.8: Compute: max, Harness: Mini-SWE-agent, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Harness: Mini-SWE-agent, Temperature: 1, Output limit: 131,072 tokens	0 %	Higher measured value36.842 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	53.918 %	Higher measured value59.061 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	54.384 %	Higher measured value59.586 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	65.706 %	Higher measured value71.553 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	0 %	Higher measured value20 %	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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	86.112 %	Higher measured value89.811 %	Vals AI Source details Data as of: 10/12/2026
LegalBenchRhetoric Tasks Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	78.389 %	Higher measured value83.625 %	Vals AI 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 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	76.033 %	Higher measured value78.312 %	Vals AI Source details Data as of: 10/12/2026
Terminal-Bench 4.0Operations Test details Test setup not documented as identicalNo direct winnerVersion: 4.0Metric: accuracyScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	11.111 %	Higher measured value48.148 %	Vals AI Source details Data as of: 10/13/2026
Terminal-Bench ScienceMathematical Sciences Test details Test setup not documented as identicalNo direct winnerVersion: 0.1Metric: accuracyScoring: Higher is betterClaude Opus 4.8: Compute: max, Harness: Mini-SWE-agent, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Harness: Mini-SWE-agent, Temperature: 1, Output limit: 131,072 tokens	5.882 %	Higher measured value41.176 %	Vals AI Source details Data as of: 10/14/2026
Vals IndexHLAB Test details Test setup not documented as identicalNo direct winnerVersion: 2.1Metric: benchmark scoreScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	9.583 %	Higher measured value21.667 %	Vals AI Source details Data as of: 10/13/2026
EMBM&A Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	Higher measured value80.091 %	78.304 %	Vals AI Source details Data as of: 10/12/2026
Finance Agent (v2)Earnings Analysis Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	72.07 %	Higher measured value78.596 %	Vals AI Source details Data as of: 10/12/2026
Harvey's Legal Agent BenchmarkBanking Finance · Criteria passed Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: criteria pass rateScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	87.732 %	Higher measured value92.565 %	Vals AI Source details Data as of: 10/12/2026
Legal Research BenchCivil Litigation · All-pass Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: all-pass rateScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	Higher measured value51.852 %	44.444 %	Vals AI Source details Data as of: 10/12/2026
LegalBenchRule Tasks Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	79.976 %	Higher measured value87.136 %	Vals AI Source details Data as of: 10/13/2026
Tax Agent BenchFact-Pattern Analysis Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	25.581 %	Higher measured value46.512 %	Vals AI Source details Data as of: 10/12/2026
Terminal-Bench 4.0Science Test details Test setup not documented as identicalNo direct winnerVersion: 4.0Metric: accuracyScoring: Higher is betterClaude Opus 4.8: Compute: max, Temperature: 1, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	38.095 %	Higher measured value57.143 %	Vals AI 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 4.8

Reasoning (requested): high

Current attempt

Run date: Oct 1, 2026
API provider: openrouter
Requested API model: anthropic/claude-opus-4.8
API model reported in response: anthropic/claude-opus-4.8
Reasoning setting: high
Pinned endpoint: Anthropic | anthropic/claude-4.8-opus-20260528
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: 18 s

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

Muse Wonder Full

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 4.8 and Muse Wonder Full with other leading models using the same data and benchmark logic.

View the complete LLM comparison