Anthropic Claude Fable 5.2 listed on OpenRouter

Claude Fable 5.2 costs $8.0 per million input tokens and $40.0 per million output tokens with a context window of 1000000 tokens. The batch variant costs $4.0 per million input tokens and $20.0 per million output tokens, also with a context window of 1000000 tokens. Neither model has a free variant.

AWS Machine Learning announced Introducing Claude Fable 5.2 on AWS. According to AWS Machine Learning, Claude Fable 5.2 is Anthropic’s most capable generally available model for technical work that raises the bar in coding and the sciences. According to AWS Machine Learning, Fable 5.2 can run unattended for hours to days. AWS Machine Learning also states that Claude Fable 5.2 is designated as a Covered Model and that by default use requires retention for up to 30 days and human safety review.