Setting a custom price for a model in AgentsView

Simon Willison · Simon Willison · 2026-06-09

Simon Willison documents a recipe for adding a custom model price to AgentsView, a local token-usage tracking tool by Wes McKinney, after Claude Fable 5 was not yet listed in the app's pricing database on its launch day.

Open original ↗

Appears in

Anthropic Launches Claude Fable 5 and Mythos 5: Agentic Capability Leap and Tiered Access

Extraction

Topics: developer-toolsllm-pricingtoken-usage-trackingagentsview

Claims

AgentsView by Wes McKinney tracks token usage across different coding agents running locally and visualizes it as a treemap.
Claude Fable 5 was absent from AgentsView's pricing database on the day of its release.
Willison used Claude Fable 5 to reverse-engineer AgentsView and determine how to manually set custom model prices.

Key quotes

I used Fable to reverse-engineer AgentsView and figured out this recipe for setting custom prices.