Models API Enhancement

The Claude Platform has expanded the Models API to include critical model capability information. The GET /v1/models and GET /v1/models/{model_id} endpoints now return structured metadata about each model's capabilities.

What's New

The API responses now include:

• max_input_tokens: Maximum input token capacity for the model
• max_tokens: Maximum output token capacity
• capabilities object: Details about which features each model supports

What Developers Should Do

Instead of consulting documentation to determine model capabilities, developers can now query the API directly to discover supported features in a programmatic, always-current manner. This is particularly useful when building applications that need to dynamically select models based on required capabilities or handle multiple model versions.

Impact

This change enables more robust API integrations where applications can gracefully adapt to available model features without hardcoding version-specific logic.