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Access 195+ AI models from leading providers through a single API. All models support the OpenAI-compatible chat completions format.

Browse Models

Visual Model Catalog — Search, filter, and compare all 195+ models with real-time pricing, context windows, and capabilities.

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Using a Model

To use any model, pass its ID to the chat completions endpoint: 
import Casedev from 'casedev';

const client = new Casedev({ apiKey: 'sk_case_YOUR_API_KEY' });

const response = await client.llm.v1.chat.createCompletion({
  model: 'anthropic/claude-sonnet-4.5',
  messages: [{ role: 'user', content: 'Hello!' }]
});

console.log(response.choices[0].message.content);

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Programmatic Access

Get the complete model list via API: 
import Casedev from 'casedev';

const client = new Casedev({ apiKey: 'sk_case_YOUR_API_KEY' });

const { data: models } = await client.llm.v1.listModels();

for (const model of models) {
  console.log(`${model.id}: $${model.pricing.input}/input, $${model.pricing.output}/output`);
}
Response includes all models with current pricing, context windows, and capabilities.