For one thing it seems to splitting up the work and making some determination of complexity, then allocating it out to a model based on that complexity to save resources. When I run Claude with Opus 4.5 and run /cost I see tokens for Opus 4.5, but also a lot in Sonnet and Haiku, with the majority of tokens actually being used by Haiku.
For one thing it seems to splitting up the work and making some determination of complexity, then allocating it out to a model based on that complexity to save resources. When I run Claude with Opus 4.5 and run /cost I see tokens for Opus 4.5, but also a lot in Sonnet and Haiku, with the majority of tokens actually being used by Haiku.