What is Claude Sonnet 4 20250514 V1 0 2?
Claude Sonnet 4 20250514 V1 0 2 is a chat model from anthropic (slug: anthropic-claude-sonnet-4-20250514-v1-0-2). Pick Claude Sonnet 4 20250514 V1 0 2 when you need Anthropic's mid-frontier coding and writing tier. It is the default Claude workhorse: cheaper than Opus, stronger than Haiku on long-context agent work.
Catalog snapshot 2026-06-27.