gh-hiroshi75-protografico-protografico/skills/langgraph-master/06_llm_model_ids_claude_platforms.md

Claude Platform-Specific Guide

How to use Claude on different cloud platforms.

Anthropic API (Direct)

Basic Usage

from langchain_anthropic import ChatAnthropic

llm = ChatAnthropic(
    model="claude-sonnet-4-5",
    anthropic_api_key="sk-ant-..."
)

Listing Models

import anthropic
import os

client = anthropic.Anthropic(api_key=os.getenv("ANTHROPIC_API_KEY"))
models = client.models.list()

for model in models.data:
    print(f"{model.id} - {model.display_name}")

Google Vertex AI

Model ID Format

Vertex AI uses @ notation:

claude-opus-4-1@20250805
claude-sonnet-4@20250514
claude-haiku-4.5@20251001

Usage

from langchain_google_vertexai import ChatVertexAI

llm = ChatVertexAI(
    model="claude-haiku-4.5@20251001",
    project="your-gcp-project",
    location="us-central1"
)

Environment Setup

# GCP authentication
gcloud auth application-default login

# Environment variables
export GOOGLE_CLOUD_PROJECT="your-project-id"
export GOOGLE_CLOUD_LOCATION="us-central1"

AWS Bedrock

Model ID Format

Bedrock uses ARN format:

anthropic.claude-opus-4-1-20250805-v1:0
anthropic.claude-sonnet-4-20250514-v1:0
anthropic.claude-haiku-4-5-20251001-v1:0

Usage

from langchain_aws import ChatBedrock

llm = ChatBedrock(
    model_id="anthropic.claude-haiku-4-5-20251001-v1:0",
    region_name="us-east-1",
    model_kwargs={
        "temperature": 0.7,
        "max_tokens": 4096
    }
)

Environment Setup

# AWS CLI configuration
aws configure

# Or environment variables
export AWS_ACCESS_KEY_ID="your-access-key"
export AWS_SECRET_ACCESS_KEY="your-secret-key"
export AWS_DEFAULT_REGION="us-east-1"

Azure AI (Microsoft Foundry)

Release: Public preview started in November 2025

Model ID Format

Azure AI uses the same format as Anthropic API:

claude-opus-4-1
claude-sonnet-4-5
claude-haiku-4-5

Available Models

• Claude Opus 4.1 (claude-opus-4-1)
• Claude Sonnet 4.5 (claude-sonnet-4-5)
• Claude Haiku 4.5 (claude-haiku-4-5)

Usage

# Calling Claude using Azure OpenAI SDK
import os
from openai import AzureOpenAI

client = AzureOpenAI(
    azure_endpoint=os.getenv("AZURE_FOUNDRY_ENDPOINT"),
    api_key=os.getenv("AZURE_FOUNDRY_API_KEY"),
    api_version="2024-12-01-preview"
)

# Specify deployment name (default is same as model ID)
response = client.chat.completions.create(
    model="claude-sonnet-4-5",  # Or your custom deployment name
    messages=[
        {"role": "user", "content": "Hello"}
    ]
)

Custom Deployments

You can set custom deployment names in the Foundry portal:

# Using custom deployment name
response = client.chat.completions.create(
    model="my-custom-claude-deployment",
    messages=[...]
)

Environment Setup

export AZURE_FOUNDRY_ENDPOINT="https://your-foundry-resource.azure.com"
export AZURE_FOUNDRY_API_KEY="your-api-key"

Region Limitations

Currently available in the following regions:

• East US2
• Sweden Central

Deployment type: Global Standard

Platform-Specific Features

Platform	Model ID Format	Benefits	Drawbacks
Anthropic API	claude-sonnet-4-5	Instant access to latest models	Single provider dependency
Vertex AI	claude-sonnet-4@20250514	Integration with GCP services	Complex setup
AWS Bedrock	anthropic.claude-sonnet-4-20250514-v1:0	Integration with AWS ecosystem	Complex model ID format
Azure AI	claude-sonnet-4-5	Azure + GPT and Claude integration	Region limitations

Cross-Platform Fallback

from langchain_anthropic import ChatAnthropic
from langchain_google_vertexai import ChatVertexAI
from langchain_aws import ChatBedrock

# Primary and fallback (multi-platform support)
primary = ChatAnthropic(model="claude-sonnet-4-5")
fallback_gcp = ChatVertexAI(
    model="claude-sonnet-4@20250514",
    project="your-project"
)
fallback_aws = ChatBedrock(
    model_id="anthropic.claude-sonnet-4-20250514-v1:0",
    region_name="us-east-1"
)

# Fallback across three platforms
llm = primary.with_fallbacks([fallback_gcp, fallback_aws])

Model ID Comparison Table

Anthropic API	Vertex AI	AWS Bedrock	Azure AI
claude-opus-4-1-20250805	claude-opus-4-1@20250805	anthropic.claude-opus-4-1-20250805-v1:0	claude-opus-4-1
claude-sonnet-4-5	claude-sonnet-4@20250514	anthropic.claude-sonnet-4-20250514-v1:0	claude-sonnet-4-5
claude-haiku-4-5-20251001	claude-haiku-4.5@20251001	anthropic.claude-haiku-4-5-20251001-v1:0	claude-haiku-4-5

Reference Links

• Anthropic API Documentation
• Vertex AI Claude Models
• AWS Bedrock Claude Models
• Azure AI Claude Documentation
• Claude in Microsoft Foundry Announcement