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# CometAPI > CometAPI is a unified API platform providing access to 500+ AI models from multiple providers. Use this index to find model information, current pricing, integration instructions, API references, and support. Use the model catalog for available models and their exact API model IDs. English model pages use `/models/{provider}/{model-id}/` on `https://www.cometapi.com`; follow actual catalog links instead of constructing URLs from display names. Model page slugs and API model IDs may differ. Use the API documentation for authentication, endpoint compatibility, request parameters, and response formats. Fetch current pricing from the pricing page and relevant model page; do not infer prices or capabilities from a model name. Documentation links below use Markdown where available. ## Main Entry Points - [CometAPI homepage](https://www.cometapi.com/): Platform overview, supported providers, and features. - [Model catalog](https://www.cometapi.com/models/): Browse available models, providers, capabilities, and model detail pages. - [Current pricing](https://www.cometapi.com/pricing/): Check current API rates and billing units before estimating costs. - [API documentation](https://apidoc.cometapi.com/): Developer documentation and API reference. - [Complete developer documentation index](https://apidoc.cometapi.com/llms.txt): Discover the full set of API references, model quickstarts, integration guides, and Markdown documentation pages. ## Model Detail Pages - [GPT-6 Astra](https://www.cometapi.com/models/openai/gpt-6-astra/): Model information and pricing; confirm the exact API model ID and supported request format before use. - [GPT Image 2.5](https://www.cometapi.com/models/openai/gpt-image-2-5/): Image model information, capabilities, and pricing. - [Gemini 4](https://www.cometapi.com/models/google/gemini-4/): Model information, capabilities, and pricing. ## Quick Start and Authentication - [Create an API key and make your first call](https://apid