What
A "Sonnet 5 (1M context)" option now appears in the extended-context model picker, and the previous "Sonnet (1M context)" entry is renamed to "Sonnet 4.6 (1M context)".
Details
- New entry:
value: "sonnet[1m]"→ "Sonnet 5 (1M context)" — "Sonnet 5 with 1M context window - for long sessions with large codebases" - Renamed entry:
value: "claude-sonnet-4-6[1m]"→ "Sonnet 4.6 (1M context)" - Sonnet 5 has
native_1msupport on all 3rd-party providers (Bedrock, Vertex, Foundry, Gateway); availability is checked per-provider against a newnative_1m_3pcapability flag - The "not available for your account" error message updated from "Sonnet 4.6 with 1M context is not available…" to "Sonnet with 1M context is not available…"
Evidence
New picker option (search for "Sonnet 5 (1M context)"); renamed entry (search for "Sonnet 4.6 (1M context)"); availability check function (search for "native_1m_3p")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.