FAQ
Common questions about Claude Sonnet 4.5.
What is the Claude Sonnet 4.5 release date?
Claude Sonnet 4.5 was released on September 29, 2025 by Anthropic.
Who created Claude Sonnet 4.5?
Claude Sonnet 4.5 was created by Anthropic.
What is the license for Claude Sonnet 4.5?
Claude Sonnet 4.5 is released under the Proprietary license.
What is the knowledge cutoff date for Claude Sonnet 4.5?
Claude Sonnet 4.5 has a knowledge cutoff of January 2025. This means the model was trained on data up to this date and may not have information about events after this time.
Is Claude Sonnet 4.5 multimodal?
Yes, Claude Sonnet 4.5 is a multimodal model that can process both text and images as input.