au.writer.palmyra-x4-v1:0 shutdown date (Amazon Bedrock)

In Amazon Bedrock's words

Model provider: Writer; Model name: Palmyra X4; Model ID: writer.palmyra-x4-v1:0; Regions: us-east-1, us-east-2, us-west-1, us-west-2; Legacy date: September 9, 2026; EOL date: March 9, 2027; Public extended access start date: —

Amazon Bedrock, Deprecations page

Facts

API: Amazon Bedrock bedrock.us-east-1.amazonaws.com
Model: au.writer.palmyra-x4-v1:0
Kind: Model retirement
Announced: September 9, 2026
Takes effect: March 9, 2027
Calls after that day: Fail
Source: Deprecations page
Last updated: November 4, 2026
Verified: November 6, 2026, against Amazon Bedrock's own pages

Questions

When does au.writer.palmyra-x4-v1:0 shut down?

Calls to the model au.writer.palmyra-x4-v1:0 on Amazon Bedrock stop working on March 9, 2027.

What happens to calls after March 9, 2027?

They fail from that day.

How do I find the calls this hits in my code?

Okapi reads your repository, finds the calls this change hits and opens a pull request with the fix. It never commits to your branches: every change comes as a pull request you review.

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Is your code calling this?

Okapi finds the calls this change hits in your repo and opens the pull request with the fix before March 9, 2027.

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Amazon Bedrock au.writer.palmyra-x4-v1:0 model retirement