# model-mix

Breaks down Claude Code token usage and spend across Opus, Sonnet, and Haiku via Agent Monitor to spot expensive models doing low-complexity tasks.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · ★ 1121
- Author: hoangsonww
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/hoangsonww/Claude-Code-Agent-Monitor/tree/HEAD/plugins/ccam-analytics/skills/model-mix/SKILL.md
- Updated: 2026-10-23
- HTML: https://affpapa.org/en/nevibecode/skills/model-mix

## What it does

The skill connects to the Agent Monitor dashboard to ingest metrics from `/api/pricing/cost`, `/api/pricing`, `/api/analytics`, and `/api/sessions`. It calculates the exact token share alongside the actual cost share for the Opus, Sonnet, and Haiku families.

It calculates the cost-vs-token gap and inspects sessions from `/api/sessions?limit=200`. Sessions showing low `turn_count`, short `total_turn_duration_ms`, or minimal thinking blocks get flagged. The skill recalculates their cost at lower family rates to project concrete savings.

If the Agent Monitor service is not running with its pricing and analytics endpoints reachable, the skill will fail to generate metrics.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add hoangsonww/Claude-Code-Agent-Monitor --skill model-mix -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/model-mix/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/model-mix/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add hoangsonww/Claude-Code-Agent-Monitor --skill model-mix -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/model-mix/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add hoangsonww/Claude-Code-Agent-Monitor --skill model-mix -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/model-mix/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install hoangsonww/Claude-Code-Agent-Monitor model-mix
```

2. **Manually: put the files in place**
- File: `.github/skills/model-mix/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add hoangsonww/Claude-Code-Agent-Monitor --skill model-mix -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/hoangsonww/Claude-Code-Agent-Monitor --path plugins/ccam-analytics/skills/model-mix
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/model-mix/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add hoangsonww/Claude-Code-Agent-Monitor --skill model-mix -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/hoangsonww/Claude-Code-Agent-Monitor/tree/HEAD/plugins/ccam-analytics/skills/model-mix/SKILL.md

## When to use it
- Spot low-complexity sessions running unnecessarily on expensive Opus tiers
- Calculate the gap between token usage and dollar spend per model family
- Estimate cost savings when downshifting routine workloads to Sonnet or Haiku
- Formulate model routing policies based on empirical session telemetry

## Example prompts
- Analyze model mix for this week and check for Opus overuse
- Show where expensive models are doing cheap work across sessions
- Review model mix data and recommend routing policies

## Source text · SKILL.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: 8b3e85bea86ed561.

BEGIN THIRD-PARTY FILE 8b3e85bea86ed561
```text
---
name: model-mix
description: >
  Break down Claude Code usage by model family (Opus / Sonnet / Haiku) from the
  Agent Monitor dashboard — each family's share of tokens, share of cost, and
  the spots where an expensive model is doing cheap work. Pulls per-model token
  and cost splits from /api/pricing/cost, current rates from /api/pricing, fleet
  token totals from /api/analytics, and per-session model assignment from
  /api/sessions. Use when deciding model routing or whether to downshift work to
  a cheaper tier.
---

# Model Mix

See where your tokens and dollars go by model family, and where to re-route work.

## Input

The user provides: **$ARGUMENTS**

This may be: empty (analyze the whole fleet), "today" / "this week" / a date range, or a focus like "where is Opus overused?". When empty, analyze all data from `/api/pricing/cost` and `/api/sessions`.

## Data Sources

| Endpoint | Returns |
|----------|---------|
| `GET /api/pricing/cost` | `{ total_cost, breakdown: [{ model, input_tokens, output_tokens, cache_read_tokens, cache_write_tokens, cost, matched_rule }] }` — per-model token and cost split |
| `GET /api/pricing` | `{ pricing: [{ model_pattern, display_name, input_per_mtok, output_per_mtok, cache_read_per_mtok, cache_write_per_mtok }] }` — rates per family |
| `GET /api/analytics` | `tokens` totals (total_input, total_output, total_cache_read, total_cache_write — baselines pre-summed), `agent_types` for delegation context |
| `GET /api/sessions?limit=200` | Session list — model, cwd, started_at, ended_at, inline `cost`, metadata (JSON: thinking_blocks, turn_count, total_turn_duration_ms, usage_extras) |

### How families and rates work

Map each `model` in the cost breakdown to a family from its `matched_rule` / `display_name`:

| Family | Input $/Mtok | Output $/Mtok | Cache Read $/Mtok | Cache Write $/Mtok |
|--------|-------------|--------------|-------------------|-------------------|
| Opus 4.5/4.6 | $5 | $25 | $0.50 | $6.25 |
| Sonnet 4/4.5/4.6 | $3 | $15 | $0.30 | $3.75 |
| Haiku 4.5 | $1 | $5 | $0.10 | $1.25 |

`cost = (tokens / 1M) × rate_per_mtok` summed over the 4 token types; longest `model_pattern` wins. Opus output costs ~5× Sonnet and ~5× Haiku per token, so a family's **cost share routinely exceeds its token share** — that gap is the routing signal.

## Report Sections

### 1. Token Share by Family
Aggregate `input + output + cache_read + cache_write` tokens per family from `/api/pricing/cost`. Show each family's tokens and percent of total. Cross-check the grand total against `/api/analytics` token totals.

### 2. Cost Share by Family
Sum `cost` per family. Show each family's dollar total and percent of `total_cost`. Place the cost-share % next to the token-share % so the premium gap is visible.

### 3. Cost-vs-Token Gap
```
END THIRD-PARTY FILE 8b3e85bea86ed561

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---
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