Claude Sonnet 3
Anthropic · Multimodal model · Registered 2024-02-29
IDENTITY
Confirmed by
Confirmed first-party from Anthropic's model deprecations (platform.claude.com/docs/en/about-claude/model-deprecations) and release notes, 27 June 2026.
First registered
2024-02-29 (official_announcement)
Developer confirmed
2026-06-27
PROVENANCE
Claimed developer
Anthropic
Confirmed developer
Anthropic
Delta
849 days · match confirmed