# @tonichen — 2026-10-09

♥56 ↻4 · https://x.com/tonichen/status/2108580726018871381

Sonnet 4.5's AWS Bedrock deprecation dates:

- October 8, 2026: Legacy state begins
- January 8, 2027: Extended access begins
- April 8, 2027: This model will no longer be available for use and requests made to this model ID will fail https://t.co/sChJA18IYQ

![photo](../../../media/HUMlSW-XkAAZXr5.jpg)
tags: author:tonichen, deprecation, has-image, kind:image, kind:tweet, model:claude-sonnet-4-5, on:claude-sonnet-4-5, year:2026
cited on: claude-sonnet-4-5