Claude Fable 5.1

Claude Fable 5.1 is a Azure Anthropic model available in Agent Serve. Claude Fable 5.1 is a Azure Anthropic model tracked in Agent Serve. It supports a 1M token context window. Pricing starts at $10/1M input tokens and $50/1M output tokens. Key capabilities include Tool choice, Structured outputs, Thinking low, medium, high, xhigh.

Claude Fable 5.1 starts at $10/1M input tokens, $0.25/1M cached input tokens, and $50/1M output tokens.

Claude Fable 5.1 supports a context window of 1M tokens in Agent Serve. In an agent, this determines how much conversation history, tool outputs, and retrieved documents the model can hold in a single call.

Claude Fable 5.1 supports the following capabilities in Agent Serve: Tool choice, Structured outputs, Thinking low, medium, high, xhigh, Max output 128k.

Best for reasoning-heavy tasks that need more deliberate model control. When used in an Agent Serve workflow, it can be selected in any Agent block from the model picker.