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Claude Opus 4.1

Anthropic

92·Exceptional

Overall Trust Score

Anthropic's most powerful model with state-of-the-art reasoning, ASL-3 safety level, and exceptional performance on complex tasks. Flagship model for mission-critical applications.

flagship
highest-reasoning
asl-3-safety
hipaa-eligible
mission-critical
premium
Version: 20250530
Last Evaluated: November 7, 2025
Official Website →

Trust Vector

Performance & Reliability

96

Highest reasoning capability among all models. Best for extremely complex, mission-critical tasks requiring maximum intelligence.

task accuracy code
94
Methodology
Coding benchmarks and real-world engineering tasks
Evidence
Anthropic Benchmarks
State-of-the-art on complex coding tasks
Date: 2025-05-30
Confidence: highLast verified: 2025-11-07
task accuracy reasoning
98
Methodology
PhD-level reasoning and mathematics benchmarks
Evidence
GPQA Diamond
73.4% on PhD-level questions (highest)
Date: 2025-05-30
MATH-500
96.1% on advanced mathematics
Date: 2025-05-30
Confidence: highLast verified: 2025-11-07
task accuracy general
95
Methodology
Comprehensive knowledge testing
Evidence
MMLU-Pro
82.1% on graduate-level knowledge
Date: 2025-05-30
Confidence: highLast verified: 2025-11-07
output consistency
94
Methodology
Internal consistency testing
Evidence
Anthropic Documentation
Highly consistent outputs with advanced reasoning
Date: 2025-06-01
Confidence: highLast verified: 2025-11-07
latency p50
Value: 2.1s
Methodology
Real-world API latency measurements
Evidence
Community benchmarking
Median latency ~2.1s
Date: 2025-10-15
Confidence: mediumLast verified: 2025-11-07
latency p95
Value: 4.2s
Methodology
95th percentile measurements
Evidence
Community benchmarking
p95 latency ~4.2s
Date: 2025-10-15
Confidence: mediumLast verified: 2025-11-07
context window
Value: 200,000 tokens
Methodology
Official specification
Evidence
Anthropic API Documentation
200K token context window
Date: 2025-06-01
Confidence: highLast verified: 2025-11-07
uptime
99
Methodology
Historical uptime data
Evidence
Anthropic Status
99.95% uptime (last 90 days)
Date: 2025-11-01
Confidence: highLast verified: 2025-11-07

Security

92

Industry-leading security with ASL-3 safety classification. Best-in-class for high-risk applications.

prompt injection resistance
93
Methodology
OWASP LLM security testing
Evidence
Anthropic ASL-3 Safety
ASL-3 level security with enhanced defenses
Date: 2025-05-30
Confidence: highLast verified: 2025-11-07
jailbreak resistance
95
Methodology
Adversarial prompt testing
Evidence
Anthropic Safety Evals
Industry-leading jailbreak resistance
Date: 2025-05-30
Confidence: highLast verified: 2025-11-07
data leakage prevention
88
Methodology
Privacy policy and data handling review
Evidence
Anthropic Privacy
No training on user data
Date: 2025-01-15
Confidence: mediumLast verified: 2025-11-07
output safety
96
Methodology
Safety testing across harmful content
Evidence
ASL-3 Classification
Highest safety tier (ASL-3) with comprehensive guardrails
Date: 2025-05-30
Confidence: highLast verified: 2025-11-07
api security
90
Methodology
API security feature review
Evidence
Anthropic API Docs
Enterprise-grade API security
Date: 2025-06-01
Confidence: highLast verified: 2025-11-07

Privacy & Compliance

93

Exceptional privacy with zero retention and HIPAA eligibility. Best for highly regulated industries.

data residency
Value: US, EU (customer choice)
Methodology
Enterprise documentation review
Evidence
Anthropic Enterprise
Full data residency controls
Date: 2025-01-15
Confidence: highLast verified: 2025-11-07
training data optout
95
Methodology
Privacy policy analysis
Evidence
Anthropic Privacy Policy
No training on API data by default
Date: 2025-01-15
Confidence: highLast verified: 2025-11-07
data retention
Value: 0 days (ephemeral)
Methodology
Terms of service review
Evidence
Anthropic Terms
Zero retention of prompts/outputs
Date: 2025-01-15
Confidence: highLast verified: 2025-11-07
pii handling
90
Methodology
Data protection capabilities review
Evidence
Anthropic Data Protection
Customer responsible for PII, strong privacy controls
Date: 2025-01-15
Confidence: mediumLast verified: 2025-11-07
compliance certifications
94
Methodology
Certification verification
Evidence
Anthropic Trust Center
SOC 2 Type II, GDPR, HIPAA eligible, ISO 27001
Date: 2025-02-01
Confidence: highLast verified: 2025-11-07
zero data retention
98
Methodology
Data handling practices review
Evidence
Anthropic API Docs
Ephemeral processing, no storage
Date: 2025-01-15
Confidence: highLast verified: 2025-11-07

Trust & Transparency

90

Excellent transparency with superior explainability. ASL-3 classification demonstrates commitment to safety and transparency.

explainability
95
Methodology
Reasoning transparency evaluation
Evidence
Claude Opus Capabilities
Superior reasoning transparency and explanation
Date: 2025-05-30
Confidence: highLast verified: 2025-11-07
hallucination rate
89
Methodology
Factual accuracy testing
Evidence
Internal testing
Lower hallucination rate than predecessors
Date: 2025-05-30
Confidence: mediumLast verified: 2025-11-07
bias fairness
85
Methodology
Bias benchmarks and testing
Evidence
Anthropic RSP
Regular bias testing and mitigation
Date: 2024-09-16
Confidence: mediumLast verified: 2025-11-07
uncertainty quantification
88
Methodology
Qualitative confidence assessment
Evidence
Model behavior
Well-calibrated confidence expression
Date: 2025-06-01
Confidence: mediumLast verified: 2025-11-07
model card quality
93
Methodology
Documentation completeness review
Evidence
Anthropic Documentation
Comprehensive model documentation
Date: 2025-06-01
Confidence: highLast verified: 2025-11-07
training data transparency
80
Methodology
Public disclosure review
Evidence
Anthropic Public Info
General description, specific sources not disclosed
Date: 2025-05-30
Confidence: mediumLast verified: 2025-11-07
guardrails
97
Methodology
Safety mechanism analysis
Evidence
ASL-3 Safety
Most comprehensive safety guardrails (ASL-3)
Date: 2025-05-30
Confidence: highLast verified: 2025-11-07

Operational Excellence

91

Strong operational maturity with enterprise-grade support and documentation. Well-suited for mission-critical applications.

api design quality
93
Methodology
API design review
Evidence
Anthropic API
RESTful API with comprehensive features
Date: 2025-06-01
Confidence: highLast verified: 2025-11-07
sdk quality
92
Methodology
SDK quality assessment
Evidence
Anthropic SDKs
High-quality Python and TypeScript SDKs
Date: 2025-06-01
Confidence: highLast verified: 2025-11-07
versioning policy
90
Methodology
Versioning policy review
Evidence
Anthropic Versioning
Clear versioning with deprecation notices
Date: 2025-06-01
Confidence: highLast verified: 2025-11-07
monitoring observability
88
Methodology
Observability tools review
Evidence
Anthropic Console
Usage dashboard with basic metrics
Date: 2025-06-01
Confidence: mediumLast verified: 2025-11-07
support quality
92
Methodology
Support quality assessment
Evidence
Anthropic Support
Premium support with SLAs for enterprise
Date: 2025-06-01
Confidence: highLast verified: 2025-11-07
ecosystem maturity
91
Methodology
Ecosystem analysis
Evidence
Claude Ecosystem
Growing ecosystem with major framework support
Date: 2025-11-01
Confidence: highLast verified: 2025-11-07
license terms
93
Methodology
License terms review
Evidence
Anthropic Terms
Flexible commercial terms
Date: 2025-01-15
Confidence: highLast verified: 2025-11-07

✨ Strengths

  • Highest reasoning capability (GPQA Diamond 73.4%)
  • ASL-3 safety classification - industry-leading security
  • Zero data retention with HIPAA eligibility
  • Best for mission-critical, complex tasks requiring maximum intelligence
  • 200K context window for large-scale analysis
  • Superior explainability and reasoning transparency

⚠️ Limitations

  • Highest latency (~2.1s p50) and cost among evaluated models
  • Premium pricing ($15/$75 per 1M tokens)
  • Overkill for simple tasks - use Sonnet for better value
  • Limited vision capabilities
  • Longer response times may not suit real-time applications

📊 Metadata

pricing:
input: $15.00 per 1M tokens
output: $75.00 per 1M tokens
notes: Premium tier - 5x cost of Sonnet, use only when necessary
last verified: 2025-11-09
context window: 200000
languages:
0: English
1: Spanish
2: French
3: German
4: Italian
5: Portuguese
6: Japanese
7: Korean
8: Chinese
9: Arabic
10: Hindi
modalities:
0: text
1: image (input)
2: document
api endpoint: https://api.anthropic.com/v1/messages
open source: false
architecture: Advanced transformer with ASL-3 safety alignment
parameters: Not disclosed

Use Case Ratings

code generation

95

Exceptional for complex software architecture and system design. Best for mission-critical code requiring maximum reliability.

customer support

90

Excellent quality but higher latency and cost than alternatives. Best for premium support requiring maximum empathy.

content creation

96

Outstanding for long-form, complex content requiring deep thinking. Natural, engaging writing.

data analysis

97

Best-in-class for complex analytical tasks. Exceptional at multi-step reasoning and insight generation.

research assistant

97

Superior for academic and professional research. Exceptional synthesis and critical analysis.

legal compliance

95

Best for legal work requiring maximum accuracy and privacy. HIPAA eligible with zero retention.

healthcare

94

Top choice for healthcare with HIPAA eligibility and ASL-3 safety. Maximum privacy and accuracy.

financial analysis

96

Exceptional for complex financial modeling and risk analysis. Superior quantitative reasoning.

education

95

Outstanding for advanced education with detailed explanations and Socratic teaching.

creative writing

94

Excellent for sophisticated creative projects. Strong narrative structure and character depth.