Bug Report: I can't use `bedrock`. it requires access to us-east-2 but I...

I'm successfully using claude code with specifying AWS region. I have temporary credentials in my environment for an AWS account where claude 3.7 is approved in us-west-2

I'm exporting these variables in my env

export AWS_REGION=us-west-2         
export ANTHROPIC_MODEL='us.anthropic.claude-3-7-sonnet-20250219-v1:0'
export CLAUDE_CODE_USE_BEDROCK=1
export DISABLE_PROMPT_CACHING=1

An then launching claude code works.

I have the same issue. I have these set, but it's still trying to access us-east-2.

# Claude Code
export CLAUDE_CODE_USE_BEDROCK=1
export ANTHROPIC_MODEL='us.anthropic.claude-3-7-sonnet-20250219-v1:0'
export AWS_REGION=us-east-1
export DISABLE_PROMPT_CACHING=0

I see! think the issue in your case is that you don't have IAM permission in your role to use Bedrock cross-region inference, which is required for Claude 3.7. Even if you have gotten model access in us-east-1, that model can still only be accessed through a cross-region inference profile (the us.in the beginning of the ANTHROPIC_MODEL gives that away). To use a cross-region inference profile, the IAM role you use must have bedrock:invokeModel and bedrock:InvokeModelWithResponseStream permissions in each region. If your org has SCPs or explicit denies on regions that's part of the inference profile, cross-region inference will not work.

Also, are your purposefully trying to use prompt caching? That feature is in gated preview through Bedrock currently and requires you have been enrolled to the beta.

In our situation, we don't have access to every region in us.anthropic.claude-3-7-sonnet-20250219-v1:0. We have access to us-east-1 only. Is there a way to disable cross region inference?

I've also since re-enabled prompt caching.

No. As far as I understand, 3.7 is only available via cross-region inference on Bedrock at the moment.

Appreciate the insight. One of our admins has a ticket open with AWS. I'll post back with outcome of that.

You probably also need to disable your profile
export AWS_PROFILE= and try again. Use the keys from the AWS console. Let us know if that works. Under the hood we're using the plain https://www.npmjs.com/package/@anthropic-ai/bedrock-sdk

I found that claude would only use bedrock if I explicitly exported both AWS_PROFILE and AWS_REGION, even though they are defined in my ~/.aws/credentials and ~/.aws/config files YMMV

+1 on explicit working for us-west-2 region:

saml2aws login -a some-profile-name
export CLAUDE_CODE_USE_BEDROCK=1
export ANTHROPIC_SMALL_FAST_MODEL='us.anthropic.claude-3-5-haiku-20241022-v1:0'
export ANTHROPIC_MODEL='us.anthropic.claude-3-7-sonnet-20250219-v1:0'
export AWS_REGION=us-west-2
export DISABLE_PROMPT_CACHING=1
export AWS_PROFILE=some-profile-name

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