diff --git a/.github/workflows/iyarc-prune.yml b/.github/workflows/iyarc-prune.yml
index 1adb4639dea..651494983e1 100644
--- a/.github/workflows/iyarc-prune.yml
+++ b/.github/workflows/iyarc-prune.yml
@@ -79,7 +79,7 @@ jobs:
           use_bedrock: 'true'
           github_token: ${{ secrets.GITHUB_TOKEN }}
         env:
-          ANTHROPIC_MODEL: arn:aws:bedrock:us-west-2:168000258654:inference-profile/us.anthropic.claude-sonnet-4-20250514-v1:0
+          ANTHROPIC_MODEL: arn:aws:bedrock:us-west-2:168000258654:inference-profile/us.anthropic.claude-sonnet-5-5
           # Bedrock: replaying a tool-call turn requires a leading thinking block; disable to avoid 400.
           MAX_THINKING_TOKENS: '0'
           AWS_REGION: us-west-2