Source of usage audit data
AI Models & Assistants / Knowledge library
Claude Sonnet 4
Claude Sonnet 4 is a versioned Claude language model. Consult its lifecycle and model documentation before selecting it.
Why learn Claude Sonnet 4?
Offers the documented Anthropic model capabilities through hosted.
The problem it solves
Provides model inference for supported text inputs.
Where it came from
Claude Sonnet 4: Claude Sonnet 4 is a versioned Claude language model. Consult its lifecycle and model documentation before selecting it. Published aliases: claude-sonnet-4-20250514. Input: text. Output: consult source. Checked 2026-10-13. Model capabilities are distinct from tools available in a particular agent.
Build your understanding
Work through these exercises in order. Try the task before opening a reference.
- Explain what Claude Sonnet 4 does.
- Identify a use case for Claude Sonnet 4.
- Describe a limitation of Claude Sonnet 4.
- Name a compatible tool for Claude Sonnet 4.
- Compare Claude Sonnet 4 against an alternative.
Documentation and sources
- Primary source / model card (platform.claude.com)
Catalog research notes
- See the AI Workbench for source dates, pricing evidence and configuration details.
Connect the ideas
Built on
Real World Example
Legacy Model Lifecycle Management for Financial Reporting
A financial services firm automating quarterly compliance reports.
The business problem
The firm's automated reporting pipeline relied on the retired claude-sonnet-4-20250514 model, causing service interruptions and failed API requests after the June 15, 2026, retirement date.
How this topic solves it
The firm must migrate its API integration to an active model like claude-sonnet-5-5, ensuring the application remains functional by aligning with current model lifecycles.
- Access the Usage page in the Claude Console to export a CSV audit of API keys and model usage.
- Identify all instances where the application is still using the retired claude-sonnet-4-20250514 model.
- Update the application source code to replace the deprecated model identifier with the recommended replacement, claude-sonnet-5-5.
- Perform thorough testing of the reporting pipeline with the new model to ensure output consistency.
- Deploy the updated code to the production environment before the next reporting cycle.
The process of identifying and replacing retired models in a production pipeline.
CSV file identifying retired models
Application logic using API
Target replacement model
- Claude Console → Generate Audit → Usage Export
- Usage Export → Identify Retirement → Codebase
- Codebase → Update Endpoint → Active Model
Expected business outcome
Restoration of reliable automated report generation and compliance with current API support standards.
Limitations and checks
Newer models may exhibit different response characteristics compared to the retired version, requiring validation of output quality; check this by comparing historical outputs with new model test results.