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OpenRouter provides access to models from multiple providers through a single API. Website: https://openrouter.ai/

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Getting an API Key

  1. Go to OpenRouter and sign in with Google or GitHub
  2. Navigate to the keys page
  3. Copy your API key (or create a new one)

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Configuration

  1. Click the settings icon (⚙️) in CodinIT
  2. Select “OpenRouter” as the API Provider
  3. Paste your API key
  4. Choose your model

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Supported Models

CodinIT automatically fetches available models. Featured models include:
  • Claude Opus 4.5: 200k context, maximum intelligence
  • Claude Sonnet 4.5: 1M context, highest intelligence
  • GPT-5.2 Pro: 400k context, latest GPT model
  • GPT-4o: 128k context, reliable fallback
  • DeepSeek R1 (Free): 163k context, free tier available
See OpenRouter Models for the complete list.

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Features

  • Message transforms: Enable “Compress prompts and message chains to context size” to handle large prompts
  • Prompt caching: Automatically passes caching to supported models
  • Gemini caching: Manually enable “Enable Prompt Caching” for Gemini models

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Notes