AI
Model Comparison Series: Claude 4.5
Anthropic released the Claude 4.5 model family between September and November 2025, starting with Claude Sonnet 4.5 on September 29, 2025. This family includes 3 main models: * Claude Sonnet 4.5 (Sept 29, 2025): Announced as a top-tier model for coding and complex agent tasks. * Claude Haiku 4.5