Anthropic Models
Safety-first AI • Constitutional AI approach
Claude 4 Sonnet
Released May 2025
Anthropic's latest flagship model with breakthrough capabilities
Claude 4 Opus
Released May 2025
Anthropic's most powerful model for complex reasoning tasks
Claude 3.7 Sonnet
Released January 2025
Anthropic's hybrid reasoning model combining speed and capability
Claude 3.5 Haiku
Released October 2024
Anthropic's fastest and most cost-effective Claude 3.5 model
Claude 3.5 Sonnet
Released June 2024
Anthropic's enhanced Claude 3.5 with improved reasoning and coding
Claude 3 Opus
Released March 2024
Anthropic's most capable model with exceptional reasoning abilities
Claude 3 Sonnet
Released March 2024
Anthropic's balanced model offering strong performance and speed
Claude 3 Haiku
Released March 2024
Anthropic's fastest model optimized for speed and efficiency
Claude Instant
Released August 2023
Anthropic's previous generation fast model
Claude 2
Released July 2023
Previous generation Claude with strong safety focus