Anthropic Models

Safety-first AI • Constitutional AI approach

10 Models Latest: Claude 4 Sonnet

Claude 4 Sonnet

Released May 2025

LATEST

Anthropic's latest flagship model with breakthrough capabilities

Parameters
~400 billion
Context
200,000 tokens
Key Features
Breakthrough Reasoning Advanced Multimodal Enhanced Safety
View Details →

Claude 4 Opus

Released May 2025

LATEST

Anthropic's most powerful model for complex reasoning tasks

Parameters
~1 trillion
Context
200,000 tokens
Key Features
Maximum Capability Complex Reasoning Research Grade
View Details →

Claude 3.7 Sonnet

Released January 2025

LATEST

Anthropic's hybrid reasoning model combining speed and capability

Parameters
~200 billion
Context
200,000 tokens
Key Features
Hybrid Reasoning Balanced Performance Enhanced Safety
View Details →

Claude 3.5 Haiku

Released October 2024

Anthropic's fastest and most cost-effective Claude 3.5 model

Parameters
~25 billion
Context
200,000 tokens
Key Features
Ultra Fast Cost Effective Enhanced Performance
View Details →

Claude 3.5 Sonnet

Released June 2024

Anthropic's enhanced Claude 3.5 with improved reasoning and coding

Parameters
~200 billion
Context
200,000 tokens
Key Features
Advanced Reasoning Enhanced Coding Multimodal
View Details →

Claude 3 Opus

Released March 2024

Anthropic's most capable model with exceptional reasoning abilities

Parameters
~175 billion
Context
200,000 tokens
Key Features
Multimodal Long Context Safety Focus
View Details →

Claude 3 Sonnet

Released March 2024

Anthropic's balanced model offering strong performance and speed

Parameters
~100 billion
Context
200,000 tokens
Key Features
Multimodal Fast Response Balanced Performance
View Details →

Claude 3 Haiku

Released March 2024

Anthropic's fastest model optimized for speed and efficiency

Parameters
~25 billion
Context
200,000 tokens
Key Features
Ultra Fast Cost Effective Near-instant Response
View Details →

Claude Instant

Released August 2023

Anthropic's previous generation fast model

Parameters
~12 billion
Context
100,000 tokens
Key Features
Fast Response Cost Effective Good Performance
View Details →

Claude 2

Released July 2023

Previous generation Claude with strong safety focus

Parameters
~52 billion
Context
100,000 tokens
Key Features
Long Context Safety Focused Helpful Assistant
View Details →