Anthropic
Safety-first AI • Constitutional AI approach
Claude Opus 4.5
LatestAnthropic's most powerful frontier model with exceptional reasoning, coding, and scientific capabilities
Claude 4.5 Haiku
LatestAnthropic's fastest model with enhanced capabilities and efficiency
Claude Sonnet 4.5
LatestAnthropic's most capable model with breakthrough performance across all tasks
Claude 4.1 Opus
Anthropic's most advanced model with enhanced capabilities
Claude 4 Sonnet
Anthropic's next-generation balanced model with superior coding and reasoning
Claude 4 Opus
World's best coding model with multi-hour agentic workflows
Claude 3.5 Haiku
Anthropic's fastest and most cost-effective Claude 3.5 model
Claude 3.5 Sonnet
Anthropic's enhanced Claude 3.5 with improved reasoning and coding
Claude 3 Opus
Anthropic's most capable model with exceptional reasoning abilities
Claude 3 Sonnet
Anthropic's balanced model offering strong performance and speed
Claude 3 Haiku
Anthropic's fastest model optimized for speed and efficiency
Claude Instant
Anthropic's previous generation fast model
Claude 2
Previous generation Claude with strong safety focus