Claude Platform Engineers Explain API Design and Safety Choices
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Claude Platform engineers Jake Dejno and Lucca Siaudzionis described how the Claude API is updated alongside each model launch, covering how research and customer requests shape which features ship, model versioning and migrations, and cost management. They gave guidance on changing effort mid-conversation without breaking prompt caching, and said Claude Mythos and Fable share the same model weights but apply different safeguards. Claude Managed Agents and mid-conversation effort changes are in beta, and access to Mythos runs through the Cyber Verification Program.
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- Claude YouTubeBuilding the Claude API for the Frontier: Inside Claude Platform's Release and Safety Decisions
Claude Platform engineers Jake Dejno and Lucca Siaudzionis explain how the Claude API evolves alongside each model launch, covering feature release decisions, model versioning and migrations, and cost management. They detail best practices for changing effort mid-conversation without breaking prompt caching, and how Claude Mythos and Fable share the same model weights with different safeguards. Claude Managed Agents and mid-conversation effort changes are in beta, and Mythos access runs through the Cyber Verification Program.
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