model-usage

Summarize per-model cost usage from CodexBar cost JSON.

Updated Apr 3, 2026
One-click install
npx skills add https://github.com/BEIRUX/agent-skills --skill model-usage-beirux
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: model-usage
Source: https://github.com/BEIRUX/agent-skills/tree/main/model-usage
Command: npx skills add https://github.com/BEIRUX/agent-skills --skill model-usage-beirux

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

Provides a simple way to extract and summarize per-model usage and cost from CodexBar local cost logs so you can understand which models drive spend without manual JSON inspection.

Core Features & Use Cases

  • Current model detection: Automatically picks the most recent high-cost model or accepts an explicit model override.
  • All-model aggregation: Aggregates cost across daily rows to produce a ranked per-model cost breakdown for Codex or Claude.
  • Use Case: Generate a short report showing the current model's daily cost and a full breakdown for budgeting or engineering cost reviews.

Quick Start

Summarize per-model costs from a CodexBar cost JSON and return the current model's cost breakdown.

Frequently Asked Questions about model-usage

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I summarize per-model API costs from CodexBar logs?▼

To summarize per-model API costs from CodexBar logs, you can parse the local cost JSON via the CLI or stdin to output a ranked cost breakdown for budgeting and engineering reviews.

Can I get a cost breakdown for a specific AI model like Claude or Codex?▼

Yes, you can get a cost breakdown for Claude or Codex by using provider and model flags to filter the CodexBar cost JSON, returning either the most recent model summary or a full breakdown.

How do I extract AI usage costs from a JSON file for reporting?▼

You can extract AI usage costs from a JSON file for reporting by feeding the CodexBar cost log through the CLI, which aggregates daily rows and outputs text or machine-readable JSON.

Does this model-usage tool support filtering cost data by time range?▼

Yes, the model-usage tool supports filtering cost data by time range using a days flag, allowing you to limit the per-model cost aggregation to a specific recent period.

What is the best way to automate AI cost analysis from CodexBar data?▼

The best way to automate AI cost analysis from CodexBar data is to pipe the cost JSON via stdin into a script, using format flags to output machine-readable JSON for downstream processing.

How does current model detection work when parsing CodexBar cost logs?▼

Current model detection works by automatically identifying and selecting the most recent high-cost model from the CodexBar logs, unless an explicit model override is provided via CLI flags.