pi-cny-cost

A Pi extension that displays model token costs in CNY (Chinese Yuan) instead of USD.

Features

• Adds a cny-cost command to toggle a widget showing total cost in ¥ (below the editor, doesn't replace the footer)
• Built-in footer with token stats and context usage remains intact
• Built-in CNY prices for:
  • DeepSeek — deepseek-v4-flash, deepseek-v4-pro
  • MiniMax — MiniMax-M2, M2.1, M2.5, M2.7 and highspeed variants
  • Xiaomi MiMo — mimo-v2.5-pro, mimo-v2-pro, mimo-v2.5, mimo-v2-omni, mimo-v2-flash
• Customizable via ~/.pi/agent/cny.json:
  • Override the USD→CNY exchange rate (default: 7.25)
  • Add or override per-model CNY prices
  • Set rate to 0 to disable USD conversion entirely
• Falls back to USD cost × exchange rate for models without built-in CNY prices

Installation

Via Pi (recommended)

Install the package globally using pi:

pi install npm:pi-cny-cost

Or install it for your project (adds to .pi/settings.json):

pi install -l npm:pi-cny-cost

Manual installation

Then add the extension to your Pi config (e.g. ~/.pi/agent/config.json):

{
  "extensions": ["path/to/pi-cny-cost"]
}

Or if you have it in your project's package.json:

{
  "pi": {
    "extensions": ["./index.ts"]
  }
}

Usage

In the Pi TUI, run:

/cny-cost

This toggles a widget below the editor showing:

CNY cost: ¥1.23

The built-in footer with token stats and context usage remains unchanged:

↑273k ↓13k R172k 12.9%/262k (auto)   model-name

Configuration

Create or edit ~/.pi/agent/cny.json:

{
  "rate": 7.25,
  "providers": {
    "openai": {
      "modelOverrides": {
        "gpt-4o": {
          "cnyCost": {
            "input": 18.125,
            "output": 72.5,
            "cacheRead": 3.625,
            "cacheWrite": 18.125
          }
        }
      }
    },
    "anthropic": {
      "models": [
        {
          "id": "claude-sonnet-4-20250514",
          "cnyCost": {
            "input": 22.5,
            "output": 112.5,
            "cacheRead": 2.25,
            "cacheWrite": 22.5
          }
        }
      ]
    }
  }
}

Config options

Field	Type	Default	Description
rate	number	7.25	USD→CNY exchange rate for automatic conversion. Set to 0 to disable.
providers	object	{}	Per-provider model overrides.

Resolution priority

1. cny.json explicit cnyCost (per provider, matching provider:modelId)
2. Built-in CNY prices (exact values from vendor, scoped to provider)
3. Model's USD cost × exchange rate (skipped if rate is 0)
4. No cost shown

License

MIT