HighCapability
Claude 4.5: Structured Outputs GA & Model Deprecations
Action Required
Developers using structured outputs with Claude 4.5 models must migrate to the GA versions or existing models will stop functioning.
AI Impact Summary
Anthropic is generally releasing new capabilities for Claude 4.5 models, specifically focusing on structured outputs and expanding the functionality of Claude Opus 4.6. The move of the `output_config.format` parameter highlights a shift in how developers interact with structured output generation, and the deprecation of older models (Sonnet 3.7, Haiku 3.5, Opus 3) necessitates migration to newer versions (Sonnet 4.6, Haiku 4.5, Opus 4.6) to avoid service disruptions. This update impacts developers who rely on structured outputs for their applications.
Claude 4.5: Structured Outputs GA & Model Deprecations
Affected Systems
Claude Sonnet 4.5
- Date
- Date not specified
- Change type
- capability
- Severity
- high