Anthropic adds `line` field to model responses for grouping
Anthropic's Models API now returns a `line` field naming the model family (e.g., 'opus' for Opus 4.5 and 4.6). Developers should read this field instead of inferring the line from the model ID, as new lines may be added.
Impact Assessment
Alternative models
Directional candidates based on stored listed rates and editorial scenario tags; validate quality and current terms before switching
Significant cost savings
Significant cost savings
Significant cost savings
Significant cost savings
Significant cost savings
Sources
Each model in the response also has a line field, which names the model line it belongs to. Claude Opus 4.5 and Claude Opus 4.6 both report opus . Use line to group models, for example, in a m...
Comments
Does this change your best option?
Check your models and usage for free. See the relevant official changes, estimated cost, and a practical next step.