Claude Sonnet 4.5

Claude Sonnet 4.5 is Anthropic’s most capable model to date for building real-world agents and handling complex, long-horizon tasks–balancing the right speed and cost for high-volume use cases. With a context window of 200K tokens and max output of 64K tokens, Sonnet 4.5 excels in enterprise use cases like long-running agents, coding, cybersecurity, financial analysis, computer use, and research.