Claude Fable 5
Anthropic's most capable widely released model, for the most demanding reasoning and long-horizon agentic work
Claude Fable 5 is Anthropic’s generally available 5th-generation, Mythos-class Claude model release for demanding reasoning, long-horizon agentic work, software engineering, knowledge work, and vision tasks. Anthropic’s docs list the API model ID as claude-fable-5 and specify a 1M-token context window.
Pricing
Prompt-cache writes are USD 12.50 per 1M tokens (5m) or USD 20 per 1M tokens (1h). MTok means one million tokens.
Anthropic's first-party pricing table lists Claude Fable 5 at USD 10 per million base input tokens and USD 50 per million output tokens; cache hits and refreshes are USD 1 per million tokens. Anthropic documents that current Claude models accept text and image input, so this is recorded as multimodal.
Model Intelligence
Recent stories
Min Choi collected Claude Fable 5 builds spanning a native Command & Conquer iOS port, a Subway Surfers clone, procedural 3D worlds, dungeon generation, and Blender assets. The examples show developers using Fable 5 across mobile ports, browser gameplay, and 3D asset workflows.
Meng To shared workflows that convert screen recordings, assets, and scroll behavior into detailed prompts. The resulting prompts were used for Fable 5, Aura, and Koisei landing-page builds.