Head-to-head comparison

GPT-5.6 Terra 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: 156
distinct benchmarks: 20
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 GPT-5.6 Terra and Muse Wonder Full
Attribute	GPT-5.6 Terra	Muse Wonder Full
Provider	OpenAI	Meta
Released	Jul 9, 2026	Oct 12, 2026
Availability	Active	Subscription only
Model type	Proprietary	Proprietary
Parameters	Not published	Not published
Architecture	Not published	Not published
Context window	1,050,000 tokens	1M tokens
Knowledge cutoff	February 16, 2026	Not published
Technical sources	Model, Context, 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 GPT-5.6 Terra and Muse Wonder Full
Price type	GPT-5.6 Terra	Muse Wonder Full
API input	$2 ≤272K / $4 >272K	—
API output	$12 ≤272K / $18 >272K	—
Cache read	$0.2 ≤272K / $0.4 >272K	Not listed
Cache write (5 min.)	$2.5 ≤272K / $5 >272K	Not listed
Cache write (1 hr.)	Not listed	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 Muse Wonder Full is available in the stored OpenRouter snapshot. The official direct price is still shown.

Provider pricing for GPT-5.6 Terra and Muse Wonder Full
Model	Provider	Purchase route and tariff	Input per 1M tokens	Output per 1M tokens	Source
GPT-5.6 Terra	OpenAI	Direct from developerUp to 272,000 context tokens	$2	$12	Source09/22/2026
	OpenAI	Direct from developerAbove 272,000 context tokens	$4	$18	Source09/22/2026
	Amazon Bedrock	Via OpenRouteramazon-bedrock/us-east-1	$2.2	$13.2	Source10/16/2026
	Azure	Via OpenRouterazure	$2	$12	Source10/16/2026
	Azure	Via OpenRouterazure/eu	$2.2	$13.2	Source10/16/2026
	Azure	Via OpenRouterazure/us	$2.2	$13.2	Source10/16/2026
	OpenAI	Via OpenRouteropenai	$2	$12	Source10/16/2026
	OpenAI	Via OpenRouteropenai/fast	$4	$24	Source10/16/2026
	OpenAI	Via OpenRouteropenai/flex	Lowest listed price: $1	Lowest listed price: $6	Source10/16/2026

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.

GPT-5.6 TerraMuse Wonder Full

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

GPT-5.6 Terra47.804 %

Muse Wonder Full61.033 %

CyberBench v1.1Overall. Higher is better. Test setup not documented as identical

GPT-5.6 Terra72.084 %

Muse Wonder Full73.631 %

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

GPT-5.6 Terra66.205 %

Muse Wonder Full71.917 %

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

GPT-5.6 Terra54.436 %

Muse Wonder Full59.061 %

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

GPT-5.6 Terra0.833 %

Muse Wonder Full21.667 %

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

GPT-5.6 Terra87.611 %

Muse Wonder Full79.833 %

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

GPT-5.6 Terra41.346 %

Muse Wonder Full53.365 %

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

GPT-5.6 Terra85.105 %

Muse Wonder Full87.418 %

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

GPT-5.6 Terra43.414 %

Muse Wonder Full49.932 %

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

GPT-5.6 Terra82.869 %

Muse Wonder Full89.335 %

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

GPT-5.6 Terra0.5 %

Muse Wonder Full0.5 %

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

GPT-5.6 Terra74 %

Muse Wonder Full94 %

Key to the marks:better valuebetter, but not conclusivetie

Benchmark scores for GPT-5.6 Terra and Muse Wonder Full
Benchmark and task	GPT-5.6 Terra	Muse Wonder Full	Source
Code MigrationOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	47.804 %	Higher measured value61.033 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	72.084 %	Higher measured value73.631 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	66.205 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	54.436 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	0.833 %	Higher measured value21.667 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	Higher measured value87.611 %	79.833 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	41.346 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	85.105 %	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 betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 30,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	43.414 %	Higher measured value49.932 %	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 betterGPT-5.6 Terra: Reasoning: xhigh, Output limit: 30,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	82.869 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	No direct winner0.5 %	No direct winner0.5 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	74 %	Higher measured value94 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	62.382 %	Higher measured value73.748 %	Vals AI Source details Data as of: 10/12/2026
SRE BenchOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: fully solved rateScoring: Higher is betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	9.542 %	Higher measured value11.832 %	Vals AI Source details Data as of: 10/14/2026
Tax Agent BenchOverall Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	30.035 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	22.727 %	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 betterGPT-5.6 Terra: Reasoning: max, Harness: Mini-SWE-agent, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Harness: Mini-SWE-agent, Temperature: 1, Output limit: 131,072 tokens	10 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	53.085 %	Higher measured value64.566 %	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 betterGPT-5.6 Terra: Reasoning: max, Harness: OpenHands, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Harness: OpenHands, Temperature: 1, Output limit: 131,072 tokens	14.822 %	Higher measured value33.978 %	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 betterGPT-5.6 Terra: Reasoning: max, Harness: OpenHands, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Harness: OpenHands, Temperature: 1, Output limit: 131,072 tokens	74.594 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	40.405 %	Higher measured value58.044 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	Higher measured value87.5 %	83.929 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	62.157 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	49.711 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	77.536 %	Higher measured value94.928 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	Higher measured value85 %	75.333 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	57.576 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	Higher measured value90.327 %	90.323 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	Higher measured value15 %	8 %	Vals AI Source details Data as of: 10/12/2026
SRE BenchCapability Score Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: capability scoreScoring: Higher is betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	Higher measured value26.845 %	17.748 %	Vals AI Source details Data as of: 10/14/2026
Tax Agent BenchControversy & Precedence Analysis Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	16.667 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	0 %	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 betterGPT-5.6 Terra: Reasoning: max, Harness: Mini-SWE-agent, 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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	48.248 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: 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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	56.667 %	Higher measured value63.333 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	82.161 %	Higher measured value85.257 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	42.756 %	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 betterGPT-5.6 Terra: Reasoning: max, 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
IOIIOI 2025 Test details Test setup not documented as identicalNo direct winnerVersion: 2Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	77.833 %	Higher measured value85.5 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	88.759 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	83.178 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	No direct winner0.5 %	No direct winner0.5 %	Vals AI Source details Data as of: 10/12/2026
SRE BenchFully Solved Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: fully solved rateScoring: Higher is betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	9.542 %	Higher measured value11.832 %	Vals AI Source details Data as of: 10/14/2026
Tax Agent BenchControversy & Precedence Analysis Test details Test setup not documented as identicalNo direct winnerVersion: 1Metric: accuracyScoring: Higher is betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	64.833 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	16.667 %	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 betterGPT-5.6 Terra: Reasoning: max, Harness: Mini-SWE-agent, 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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	66.205 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	3.948 / 5	Higher measured value4.244 / 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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	53.395 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	Higher measured value47.032 %	46.809 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	72.76 %	Higher measured value95.699 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	Higher measured value100 %	78.667 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	37.209 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	89.392 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	Higher measured value72.345 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	33.222 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	15.152 %	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 betterGPT-5.6 Terra: Reasoning: max, Harness: Mini-SWE-agent, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Harness: Mini-SWE-agent, Temperature: 1, Output limit: 131,072 tokens	15.789 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	54.436 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	50.428 %	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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	66.945 %	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 betterGPT-5.6 Terra: Reasoning: max, 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 betterGPT-5.6 Terra: Reasoning: max, Output limit: 128,000 tokens Muse Wonder Full: Reasoning: max, Temperature: 1, Output limit: 131,072 tokens	86.128 %	Higher measured value89.811 %	Vals AI Source details Data as of: 10/12/2026
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.

GPT-5.6 Terra

Reasoning (requested): high

Current attempt

Run date: Sep 7, 2026
API provider: openrouter
Requested API model: openai/gpt-5.6-terra
API model reported in response: openai/gpt-5.6-terra
Reasoning setting: high
Pinned endpoint: OpenAI | openai/gpt-5.6-terra-20260709
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: 64.6 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 GPT-5.6 Terra and Muse Wonder Full with other leading models using the same data and benchmark logic.

View the complete LLM comparison