Model family / anthropic-claude-sonnet
Claude Sonnet
Resolved to Claude Sonnet 5 5 20260928. Pin the exact model and route below; provider aliases remain moving targets.
- Exact pin
- anthropic/claude-sonnet-5.5-20260928 anthropic/claude-sonnet-5.5-20260928
- Ordering basis
- source catalog listed at Catalog listed-at, not vendor release date
- Moving aliases
- 1 Provider routes, never an exact pin
- Candidates considered
- 2 Current source-backed releases
Agent-safe resolution
Pin this concrete route
Use the model canonical slug for reproducibility; use the provider model ID only on the displayed provider route.
- Canonical model
anthropic/claude-sonnet-5.5-20260928- Provider route
anthropic/claude-sonnet-5.5-20260928- Evidence retrieved
Evidence ledger
Current concrete releases
Concrete releases are immutable identities. The displayed ordering basis is retained with each source fact.
Claude Sonnet 5 5 20260928
stable · standardsource catalog listed at · Sep 28, 2026, 06:04 PM UTCanthropic/claude-sonnet-5.5-20260928anthropic/claude-sonnet-5.5-20260928Claude Sonnet 5 20260630
stable · standardsource catalog listed at · Jun 30, 2026, 06:11 PM UTCanthropic/claude-sonnet-5-20260630anthropic/claude-sonnet-5-20260630Mutable provider routes
Observed aliases
These routes are explicitly separate from the exact pin. Their source-run resolution history remains available through the public API.
~anthropic/claude-sonnet-latest→ family latest