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Amazon Bedrock · Forced move · Announced October 8, 2026 · Sources checked Oct 17

Time to bail on Claude Sonnet 4.5 on Amazon Bedrock?

Time to Bail · Boarding pass

FromClaude Sonnet 4.5 on Amazon Bedrock
ToYour pick

Act. You can stay.

Claude Sonnet 4.5 ends on Bedrock April 8, 2027. Prices may rise from January 8, 2027.[1]

Act means: change a setting or plan before the date. You can stay.

Gate closes
End-of-life date
Time left
172days
Status
Act

Claude Sonnet 4.5 on Amazon Bedrock ends April 8, 2027

Amazon Bedrock removes Claude Sonnet 4.5 in all listed Regions on April 8, 2027. From January 8, 2027 it moves to public extended access, where prices may rise.

Email me 7 days before Apr 8

One email with the first steps. Nothing else.

We email you one link to confirm (double opt-in). Nothing starts until you click it. Unsubscribe any time. How we use your email.

Or add the date to your calendar: Apple or Outlook (.ics) · Google Calendar

How it is winding down

  1. Oct 8, 2026Legacy noticeDone
  2. Jan 8Public extended access fromNext
  3. Apr 8End-of-life date

What to do before April 8

Tick steps as you go. Your progress stays in this browser.

  1. Find the model ID

    Search for anthropic.claude-sonnet-4-5-20250929-v1:0, with or without a us., eu. or global. prefix.

  2. Pick a newer Claude model

    Anthropic names claude-sonnet-5-5 on its own API. Check the Bedrock model ID for your Region.

  3. Move before January 8

    That is when public extended access starts and prices may rise. The end date is April 8.

Email me 7 days before Apr 8

One email with the first steps. Nothing else.

We email you one link to confirm (double opt-in). Nothing starts until you click it. Unsubscribe any time. How we use your email.

Or add the date to your calendar: Apple or Outlook (.ics) · Google Calendar

Facts we checked

Facts and their sources
End-of-life dateApril 8, 2027[1]
Model IDanthropic.claude-sonnet-4-5-20250929-v1:0[1]
Regions31 Regions: af-south-1, ap-east-2, ap-northeast-1, ap-northeast-2, ap-northeast-3, ap-south-1, ap-south-2, ap-southeast-1, ap-southeast-2, ap-southeast-3, ap-southeast-4, ap-southeast-5, ap-southeast-6, ap-southeast-7, ca-central-1, ca-west-1, eu-central-1, eu-central-2, eu-north-1, eu-south-1, eu-south-2, eu-west-1, eu-west-2, eu-west-3, il-central-1, mx-central-1, sa-east-1, us-east-1, us-east-2, us-west-1, us-west-2[1]
Legacy noticeOctober 8, 2026[1]
Public extended access fromJanuary 8, 2027; expect higher prices set by the provider[1]
On the Claude APISonnet 4.5 retires November 30, 2026; Anthropic names claude-sonnet-5-5[2]
Whose date applies on Bedrock?Bedrock sets its own date; only the Bedrock dates apply there[1]
Does AWS move you to a new model?No. Migration does not happen automatically[1]
Legacy modelsNew customers can't use them; existing customers may lose access after 15 days of inactivity[1]
After the end dateRequests fail in the listed Regions, unless you have a private deal with the provider[1]
How to check your RegionCall ListFoundationModels or GetFoundationModel and read the modelLifecycle field[1]
Apps that call Claude Sonnet 4.5 on BedrockRequests fail after April 8, 2027[1]

After April 8, 2027 you will see

Requests to anthropic.claude-sonnet-4-5-20250929-v1:0 fail after the end date. AWS does not move you to a new model on its own.

Fix

  1. Change the model ID in your code to an Active model.
  2. Check the state in your Region: call ListFoundationModels and read modelLifecycle.

Source: [1] Model lifecycle (Legacy) (AWS)

Sources

Check it yourself. Every fact above links here.

  1. Model lifecycle (Legacy) AWS · primary · checked Oct 17
  2. Model deprecations Anthropic · primary · checked Oct 17
Read the published editorial report

What changed

Time to bail on Claude Sonnet 4.5 on Amazon Bedrock? Act. You can stay. Claude Sonnet 4.5 ends on Bedrock April 8, 2027. Prices may rise from January 8, 2027.

On our scale this is Act: change a setting or plan before the date. You can stay.

Amazon Bedrock removes Claude Sonnet 4.5 in all listed Regions on April 8, 2027. From January 8, 2027 it moves to public extended access, where prices may rise.

Here are the facts we checked:

  • End-of-life date: April 8, 2027 (AWS)
  • Model ID: anthropic.claude-sonnet-4-5-20250929-v1:0 (AWS)
  • Regions: 31 Regions: af-south-1, ap-east-2, ap-northeast-1, ap-northeast-2, ap-northeast-3, ap-south-1, ap-south-2, ap-southeast-1, ap-southeast-2, ap-southeast-3, ap-southeast-4, ap-southeast-5, ap-southeast-6, ap-southeast-7, ca-central-1, ca-west-1, eu-central-1, eu-central-2, eu-north-1, eu-south-1, eu-south-2, eu-west-1, eu-west-2, eu-west-3, il-central-1, mx-central-1, sa-east-1, us-east-1, us-east-2, us-west-1, us-west-2 (AWS)
  • Legacy notice: October 8, 2026 (AWS)
  • Public extended access from: January 8, 2027; expect higher prices set by the provider (AWS)
  • On the Claude API: Sonnet 4.5 retires November 30, 2026; Anthropic names claude-sonnet-5-5 (Anthropic)
  • Whose date applies on Bedrock?: Bedrock sets its own date; only the Bedrock dates apply there (AWS)
  • Does AWS move you to a new model?: No. Migration does not happen automatically (AWS)
  • Legacy models: New customers can't use them; existing customers may lose access after 15 days of inactivity (AWS)
  • After the end date: Requests fail in the listed Regions, unless you have a private deal with the provider (AWS)
  • How to check your Region: Call ListFoundationModels or GetFoundationModel and read the modelLifecycle field (AWS)
  • Apps that call Claude Sonnet 4.5 on Bedrock: Requests fail after April 8, 2027 (AWS)

You can stay on Amazon Bedrock. You have to change a setting or plan before the date.

Leaving is a choice here, not a must.

AWS is the main source for this page. Amazon Bedrock has not said more than what is listed here. If a fact is not on this page, we do not know it yet.

Who is affected

Apps that call Claude Sonnet 4.5 on Bedrock: Requests fail after April 8, 2027.

The date to remember is April 8, 2027. Make the change before then.

What to do before April 8

  1. Find the model ID. Search for anthropic.claude-sonnet-4-5-20250929-v1:0, with or without a us., eu. or global. prefix.
  2. Pick a newer Claude model. Anthropic names claude-sonnet-5-5 on its own API. Check the Bedrock model ID for your Region.
  3. Move before January 8. That is when public extended access starts and prices may rise. The end date is April 8.

A few tips:

  • Make the change yourself before the date. Do not wait for the last reminder email.
  • Write down your current plan or settings first, so you can compare after the change.
  • After the change, open your settings again and check that it worked.

How to tell your users

If the change affects your members or team, send one short email. Say what changes for them and when. Put the most important line first.

If there is a date, send a short reminder a few days before it. Keep a copy of the list you sent it to.

Options people mention

Listed for convenience. Not ranked. Not paid. These names come up in threads and reviews; that does not show where people moved.

Before you pay, check the price page of each tool yourself. Prices change, and we only list what our sources say.

Questions people ask

No questions collected yet.

Sources

Thanks.

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