Fable 5 will default to Opus 4.8 for coding tasks

- Anthropic is the AI company behind the Claude family of large language models (LLMs). Opus is their most capable (and most expensive) model tier, designed for complex reasoning and coding. - This tweet announces that "Fable 5" — likely a Claude-powered coding tool, IDE plugin, or internal development environment — will use "Opus 4.8" as its default model for programming tasks. The version number (4.8) suggests a minor release or a specific fine-tuned variant of the Opus model. - The move signals Anthropic's confidence that Opus 4.8 is strong enough at coding to be the default choice, rather than reserving it as an optional "use only for hard problems" model. It also hints at ongoing rapid iteration of the model line.