Model System Cards
System cards document the capabilities, safety evaluations, and responsible deployment decisions for Claude models.
| Model | Date | System Card |
|---|---|---|
| Claude Opus 4.5 | November 2025 | Read system card |
| Claude Haiku 4.5 | October 2025 | Read system card |
| Claude Sonnet 4.5 | September 2025 | Read system card |
| Claude Opus 4.1 | August 2025 | Read system card |
| Claude Sonnet 4 and Opus 4 | May 2025 | Read system card |
| Claude Sonnet 3.7 | February 2025 | Read system card |
| Claude Haiku 3.5 and Sonnet 3.5 (new) | October 2024 | Read system card |
| Claude Sonnet 3.5 | June 2024 | Read system card |
| Claude 3 | March 2024 | Read system card |
| Claude 2 | July 2023 | Read system card |