chore: Update AWS claude 4.5 haiku model's information

[HynoR]

#2089
更新 AWS claude 4.5 haiku 的模型区域信息

[coderabbitai]

Walkthrough

A new Claude Haiku model (claude-haiku-4-5-20251001) has been added to AWS constants with mappings to the Anthropic Claude Haiku v1 endpoint. Corresponding cross-region support entries for us, ap, and eu regions have been configured in both model ID and cross-region maps.

Changes

Cohort / File(s)	Change Summary
AWS Model Configuration relay/channel/aws/constants.go	Added claude-haiku-4-5-20251001 entry to awsModelIDMap mapping to anthropic.claude-haiku-4-5-20251001-v1:0, and corresponding cross-region support entry to awsModelCanCrossRegionMap for us, ap, and eu regions

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• feat: support claude-sonnet-4-5-20250929 #1924: Both PRs modify relay/channel/aws/constants.go by adding Anthropic Claude model entries to awsModelIDMap and awsModelCanCrossRegionMap.
• feat: add support for claude-opus-4-1 model and update ratios #1511: Both PRs add new Anthropic Claude model entries with corresponding AWS model ID and cross-region mapping configurations to constants.go.

Suggested reviewers

• seefs001

Poem

🐰✨ A haiku hops into the AWS realm,
Four-point-five, swiftly crossing seas,
From us to eu, regions at the helm! 🌍

Pre-merge checks and finishing touches

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	You can run @coderabbitai generate docstrings to improve docstring coverage.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title Check	✅ Passed	The pull request title "chore: Update AWS claude 4.5 haiku model's information" is directly related to the main changes in the changeset, which involve adding a new Claude Haiku 4.5 model entry and its cross-region support mappings to AWS constants. The title is concise, specific, and clearly indicates that this is a maintenance task involving updates to model configuration. A teammate scanning the repository history would immediately understand that this change pertains to AWS Claude model support, making the title appropriately descriptive without being overly broad or vague.

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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[coderabbitai]

Actionable comments posted: 1

📜 Review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 032f159 and b789658.

📒 Files selected for processing (1)

• relay/channel/aws/constants.go (2 hunks)

🔇 Additional comments (1)

relay/channel/aws/constants.go (1)

20-20: LGTM! Model ID is verified.

The model ID "anthropic.claude-haiku-4-5-20251001-v1:0" is correct per AWS Bedrock documentation. The mapping is accurate and the change is ready to merge.

[coderabbitai]

⚠️ Potential issue | 🔴 Critical

🧩 Analysis chain

LGTM! Verify regional availability with AWS Bedrock documentation.

The cross-region configuration is consistent with similar Claude 4.5 models and correctly uses the full model ID as the key.

Please verify that the regional availability (us, ap, eu) is accurate for this model:

---

🌐 Web query:

AWS Bedrock Claude Haiku 4.5 20251001 regional availability

💡 Result:

Short answer — As of the Claude Haiku 4.5 release (model id/date 2025-10-01), Amazon Bedrock exposes Haiku 4.5 via global cross-region inference and region-specific (US and EU) inference profiles. Key details:

• Global inference profile id: global.anthropic.claude-haiku-4-5-20251001-v1:0; callable from us-west-2, us-east-2, and us-east-1 (routes to all commercial AWS Regions). [1][2]

• US (regional) profile id: us.anthropic.claude-haiku-4-5-20251001-v1:0; source Regions that can call it: us-west-2, us-west-1, us-east-2, us-east-1 (destination routing includes us-east-1, us-east-2, us-west-1, us-west-2 as shown per source). [1]

• EU (regional) profile id: eu.anthropic.claude-haiku-4-5-20251001-v1:0; source Regions listed include eu-west-3, eu-west-2, eu-west-1, eu-south-2, eu-south-1, eu-north-1, eu-central-2, eu-central-1 with destination routing across EU regions (eu-central-1, eu-north-1, eu-south-1, eu-south-2, eu-west-1, eu-west-3). [1]

• Anthropic docs confirm the Bedrock model name mapping for Haiku 4.5: anthropic.claude-haiku-4-5-20251001-v1:0 (Bedrock) / claude-haiku-4-5-20251001 (Claude API). [2]

Sources: AWS Bedrock documentation (inference profiles / region support) and Anthropic Claude 4.5 availability notes. [1][2]

References
[1] Amazon Bedrock — Supported inference profiles & region routing (model / inference-profile details).
[2] Anthropic — What's new / Claude 4.5 availability and Bedrock model names.

---

I found information about US and EU regional availability, but the search results don't explicitly confirm an AP (Asia Pacific) cross-region profile. Let me search more specifically for APAC region support:

Remove or correct the "ap" region entry—AWS Bedrock doesn't provide an APAC cross-region inference profile for Claude Haiku 4.5.

AWS Bedrock only documents an AU (Australia) inference profile for Claude Haiku 4.5, not an APAC or "ap" profile. A Global profile exists for this model, and a Japan-specific profile (jp.anthropic.claude-haiku-4-5-20251001-v1:0) is available, but there is no generic APAC cross-region profile documented.

Additionally, if an APAC profile did exist, the code should use the "apac" prefix (not "ap"), as AWS uses "us.", "eu.", or "apac." prefixes for inference profile IDs.

Either remove the "ap" entry or verify the intended region and use the correct prefix.

🤖 Prompt for AI Agents

In relay/channel/aws/constants.go around lines 79 to 83, the map entry for
"anthropic.claude-haiku-4-5-20251001-v1:0" incorrectly lists "ap" (APAC) which
is not a documented AWS Bedrock cross-region profile for Claude Haiku 4.5;
remove the "ap" entry or replace it with the correct documented region key
(e.g., "au" for Australia, "jp" for Japan, or a Global flag) and if an APAC
profile is intended use the proper "apac" prefix per AWS naming; update the
constant to match AWS Bedrock docs and verify the region keys in other entries
for consistency.

[zebin-code]

#2089 更新 AWS claude 4.5 haiku 的模型区域信息

thanks