Model Usage

• You use CodexBar on macOS and want to know which AI model is costing the most right now.
• You need a scriptable, machine-readable breakdown of model-level costs from CodexBar's JSON output.
• You want to compare spending across all models (e.g., gpt-4o vs claude-3-5-sonnet) over your usage history.
• You want to feed model cost data into another tool or CI check via --format json --pretty.

• You are on Linux — CodexBar CLI support for Linux is not yet documented and this skill is macOS-only.
• You need token-level breakdowns per model — CodexBar's output provides cost only, not token splits.
• You are not using CodexBar at all — this skill has no value without CodexBar's local cost logs.

Automatically identifies the most recently used model by finding the latest daily row containing modelBreakdowns and selecting the highest-cost model. Falls back to modelsUsed when breakdowns are absent, and supports a manual --model <name> override.

Aggregates cost data across every model in your CodexBar history with --mode all, giving you a complete picture of where your AI spend is going.

Works with both --provider codex and --provider claude, covering the two main providers tracked by CodexBar.

Can fetch data live via codexbar cost --format json, read from a saved file with --input /path/to/cost.json, or accept piped stdin with --input -.

Returns human-readable text by default. Pass --format json --pretty to get structured JSON output suitable for scripting or further processing.

Run --provider codex --mode current each morning to instantly see which model you used most recently and what it cost, without digging through raw JSON logs.

Use --mode all --format json --pretty to export a full model-by-model cost breakdown, then import it into a spreadsheet or cost-tracking dashboard.

Pipe the JSON output into a shell script or CI job that checks whether any model's cost exceeds a threshold, enabling automated budget guardrails.

Run the skill twice — once with --provider codex and once with --provider claude — to compare total spending across both providers side by side.