Anthropic Claude 4 & All Models via Vertex AI

🚀 Complete access to all Anthropic Claude models through Google Vertex AI - including the latest Claude 4 Opus & Sonnet with extended thinking capabilities.

✨ Features

🤖 Complete Model Access

• Claude 4 Opus - Most powerful model for complex tasks and coding
• Claude 4 Sonnet - Balanced performance and cost efficiency
• Claude 3.7 Sonnet - Extended thinking capabilities
• Claude 3.5 Sonnet V2 - Advanced reasoning and analysis
• Claude 3.5 Haiku - Lightning-fast responses
• Claude 3 Opus & Haiku - Previous generation models

🧠 Advanced Capabilities

• Extended Thinking - See Claude's reasoning process (Claude 4 & 3.7)
• Vision Support - Process images, charts, documents, and screenshots
• Long Context - Handle up to 200K tokens of context
• Tool Use - Function calling and structured outputs
• Multi-modal - Text, image, and document processing

🔐 Enterprise Security

• Multiple Authentication Methods - Service Account, ADC, Environment Variables
• Google Cloud Integration - Native Vertex AI security and compliance
• No API Key Management - Uses Google Cloud IAM permissions
• Audit Logging - Full request/response logging through Vertex AI

⚙️ Flexible Configuration

• Configurable Parameters - Temperature, token limits, thinking budget
• Debug Mode - Detailed logging for troubleshooting
• Regional Deployment - Choose your preferred Google Cloud region
• Environment Flexibility - Works in any Google Cloud environment

🚀 Quick Start

1. Install the Function

1. Go to Admin Panel > Functions in Open WebUI
2. Click "+" to add a new function
3. Search for "Anthropic Claude 4 & All Models via Vertex AI" in the community
4. Click Install

2. Configure Google Cloud

# Enable Vertex AI API in your Google Cloud project
gcloud services enable aiplatform.googleapis.com

# Enable Claude models in Vertex AI Model Garden
# Go to: https://console.cloud.google.com/vertex-ai/model-garden
# Search for "Claude" and enable the models you want to use

3. Set Up Authentication

Option A: Service Account JSON (Recommended)

1. Create a service account in Google Cloud Console
2. Grant it Vertex AI User role
3. Download the JSON key file
4. Copy the JSON content and paste it in the SERVICE_ACCOUNT_JSON field

Option B: Environment Variables

export VERTEX_AI_PROJECT_ID="your-project-id"
export VERTEX_AI_LOCATION="us-east5"
export GOOGLE_APPLICATION_CREDENTIALS="/path/to/service-account.json"

Option C: Application Default Credentials

gcloud auth application-default login

4. Configure the Function

1. Go to Functions > Vertex AI Claude > Settings
2. Set your PROJECT_ID (your Google Cloud project ID)
3. Adjust other settings as needed:
   • LOCATION: us-east5 (recommended for Claude models)
   • ENABLE_THINKING: true for Claude 4 thinking capabilities
   • MAX_OUTPUT_TOKENS: 4096 (or higher for longer responses)

📋 Configuration Reference

Required Settings

Authentication (Choose One)

Optional Settings

🎯 Usage Examples

Basic Chat

User: Explain quantum computing in simple terms
Claude: [Provides detailed explanation using Claude 4's capabilities]

Extended Thinking (Claude 4)

User: Plan a complete marketing strategy for a new SaaS product

🤔 **Thinking Process:**
Let me break this down systematically...
[Shows detailed reasoning process]

**Marketing Strategy:**
[Provides comprehensive strategy based on thinking process]

Vision Analysis

User: [Uploads image] What's in this chart and what insights can you provide?
Claude: [Analyzes the image and provides detailed insights]

Code Review

User: Review this Python code for security issues
Claude: [Provides detailed code analysis using Claude 4's coding expertise]

🔧 Troubleshooting

Common Issues

❌ "Authentication failed"

• Verify your service account has Vertex AI User role
• Check that your JSON is valid and complete
• Ensure your project has Vertex AI API enabled

❌ "Invalid Endpoint name"

• Verify your PROJECT_ID is correct
• Check that the Claude models are enabled in your project
• Confirm you're using the correct region (us-east5 recommended)

❌ "Model not found"

• Go to Vertex AI Model Garden and enable Claude models
• Wait a few minutes after enabling for propagation
• Check that your region supports Claude models

❌ "Quota exceeded"

• Check your Vertex AI quotas in Google Cloud Console
• Request quota increases if needed
• Consider using different regions for better availability

Debug Mode

Enable debug mode by setting DEBUG_MODE = True in the function code:

# At the top of the function code
DEBUG_MODE = True

This will show detailed logs including:

• Authentication method used
• API endpoints called
• Request/response payloads
• Error details

🌍 Supported Regions

Claude models are available in these Vertex AI regions:

• us-east5 (Virginia) - Recommended
• us-central1 (Iowa)
• europe-west4 (Netherlands)
• asia-southeast1 (Singapore)

💰 Pricing

Pricing follows Vertex AI's pay-as-you-go model:

• Claude 4 Opus: $15 input / $75 output per 1M tokens
• Claude 4 Sonnet: $3 input / $15 output per 1M tokens
• Claude 3.5 models: $3 input / $15 output per 1M tokens
• Claude 3 models: $0.25-$15 per 1M tokens (varies by model)

Prices subject to change. Check Google Cloud Vertex AI pricing for current rates.

📄 Requirements

Dependencies

• google-auth - Google Cloud authentication
• google-cloud-aiplatform - Vertex AI client library

Permissions

Your service account needs:

• Vertex AI User (roles/aiplatform.user)
• Service Account Token Creator (if using impersonation)

Google Cloud Setup

1. Enable Vertex AI API
2. Enable Claude models in Model Garden
3. Set up billing (required for Vertex AI)
4. Configure authentication

🔄 Updates & Changelog

Version 1.0.0 (2025-05-24)

• ✅ Initial release with all Claude models
• ✅ Claude 4 Opus & Sonnet support
• ✅ Extended thinking capabilities
• ✅ Multi-modal vision support
• ✅ Enterprise authentication options
• ✅ Comprehensive error handling

📚 Additional Resources

• Anthropic Claude Documentation
• Google Vertex AI Documentation
• Claude Models on Vertex AI
• Open WebUI Documentation

⚖️ Terms & Privacy

This function:

• Does not store or log your conversations
• Uses Google Cloud's security and privacy controls
• Follows Anthropic's usage policies
• Adheres to Google Cloud's terms of service

Your data is processed according to Google Cloud and Anthropic privacy policies.

Made with ❤️ for the Open WebUI Community

Get started in minutes with enterprise-grade Claude 4 access through Google Vertex AI!