feat(models): host google gemini models

[waleedlatif1]

Summary

host google gemini models, we already hosted anthropic and openai but now we host gemini too

Type of Change

• New feature

Testing

Tested manually

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

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1 Skipped Deployment

Project	Deployment	Preview	Comments	Updated (UTC)
docs	Skipped			Nov 26, 2025 8:29pm

[greptile-apps]

Greptile Overview

Greptile Summary

This PR extends the hosted model infrastructure to support Google Gemini models, following the same pattern established for OpenAI and Anthropic.

Key Changes:

• Added GEMINI_API_KEY_1/2/3 environment variables for load balancing
• Extended getRotatingApiKey() to support gemini provider with minute-based rotation
• Updated getHostedModels() to include Google models alongside OpenAI and Anthropic
• Modified getApiKey() to use server key rotation for Gemini models on hosted platform
• Added comprehensive test coverage for Gemini key rotation and hosted model validation
• Updated documentation with Gemini pricing (2.5x multiplier) for hosted models

Implementation Quality:
The implementation is clean and follows established patterns consistently across all files. The key rotation logic uses the same minute-based round-robin approach, ensuring stateless distribution across API keys. Tests are thorough and validate both rotation logic and hosted model integration.

Confidence Score: 5/5

• This PR is safe to merge with minimal risk
• The changes follow well-established patterns from existing OpenAI and Anthropic integrations. All modifications are straightforward extensions with comprehensive test coverage. The implementation is consistent, well-tested, and doesn't introduce any logical errors or security vulnerabilities.
• No files require special attention

Important Files Changed

File Analysis

Filename	Score	Overview
apps/sim/lib/env.ts	4/5	Added Gemini API key environment variables for load balancing
apps/sim/lib/utils.ts	5/5	Extended key rotation logic to support Gemini provider
apps/sim/providers/models.ts	5/5	Added Google models to hosted models list
apps/sim/providers/utils.ts	5/5	Integrated Gemini models into hosted API key rotation system

Sequence Diagram

sequenceDiagram
    participant Client as Workflow Execution
    participant Utils as providers/utils.ts
    participant KeyRotation as lib/utils.ts
    participant Env as lib/env.ts
    participant Google as Google Gemini API
    
    Client->>Utils: getApiKey('google', model, userKey)
    Utils->>Utils: Check if hosted platform
    alt isHosted && isGeminiModel
        Utils->>KeyRotation: getRotatingApiKey('gemini')
        KeyRotation->>Env: Check GEMINI_API_KEY_1
        KeyRotation->>Env: Check GEMINI_API_KEY_2
        KeyRotation->>Env: Check GEMINI_API_KEY_3
        KeyRotation->>KeyRotation: Calculate keyIndex = currentMinute % keys.length
        KeyRotation-->>Utils: Return rotated API key
        Utils-->>Client: Return server API key
        Client->>Google: Make request with rotated key
    else User provided key
        Utils-->>Client: Return user's API key
        Client->>Google: Make request with user's key
    end

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[greptile-apps]

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