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anthropicDeprecation

Anthropic deprecates Claude Sonnet 4.5

Anthropic announced the deprecation of Claude Sonnet 4.5, with retirement on November 30, 2026.

Models:claude-sonnet-4-5-20250929Claude Sonnet 5.5

What changed

Anthropic announced the deprecation of Claude Sonnet 4.5 (claude-sonnet-4-5-20250929). Retirement on the Claude API is scheduled for November 30, 2026. Anthropic recommends migrating to Claude Sonnet 5.5.

What it means for Zabio customers

Zabio offers some models from this vendor, but neither Claude Sonnet 4.5 nor Claude Sonnet 5.5 is in the Zabio catalog.

What Zabio does

Nothing changes for Zabio customers.

Source

We announced the deprecation of the Claude Sonnet 4.5 model (claude-sonnet-4-5-20250929), with retirement on the Claude API scheduled for November 30, 2026.

Original announcement: Claude Platform release notes

Published automatically from the official announcement, minutes after it appeared. Reviewed by a person within the day.

Source: Claude Platform release notes (2026-09-30)