Claude Fable 5 API is a lower-cost, Claude-compatible Messages API for Anthropic's Mythos-class model, offering half the official pricing while providing a 1M-token context window, up to 128K output tokens, streaming support, and compatibility with Claude-style requests for professional workloads.
Key benefits include:
- Half the Official Price: $5 input and $25 output per 1M tokens, reducing costs for high-volume professional workloads.
- 1M-Token Context Window: Supports large codebases, long documents, images, and multi-step agent workflows without aggressive token trimming.
- Drop-In Claude Compatibility: Uses the familiar Claude Messages API format, enabling minimal code changes for developers migrating from official Anthropic APIs.
- Long Output & Streaming: Up to 128K output tokens for detailed responses and server-sent events (SSE) for real-time streaming, ideal for interactive applications.
- Agent-Ready & Vision Support: Built for long-running agents and visual reasoning, handling image inputs (screenshots, charts) for UI debugging and complex spatial analysis.
Perfect for developers, teams, and businesses needing robust AI capabilities for large-scale coding, research, visual analysis, and autonomous agent workflows, such as software maintenance, data cleanup, and technical documentation.
