Pricing Configuration¶

Configure AI model pricing for accurate cost tracking in session analytics.

Overview¶

The config/pricing.json file contains pricing information for different Claude AI models. The session-end hook uses this file to calculate accurate costs based on the model used in each session.

File Location¶

config/pricing.json

Configuration Format¶

{
  "models": {
    "claude-sonnet-4-5-20250929": {
      "name": "Claude Sonnet 4.5",
      "input": 3.00,
      "output": 15.00,
      "cache_read": 0.30,
      "cache_write": 3.75
    },
    "claude-opus-4-5-20251101": {
      "name": "Claude Opus 4.5",
      "input": 15.00,
      "output": 75.00,
      "cache_read": 1.50,
      "cache_write": 18.75
    }
  },
  "default": {
    "name": "Default (Sonnet 4.5 pricing)",
    "input": 3.00,
    "output": 15.00,
    "cache_read": 0.30,
    "cache_write": 3.75
  }
}

Field Descriptions¶

Included Models (January 2025)¶

How It Works¶

1. Model Detection: The session-end hook extracts the model ID from the transcript (e.g., claude-sonnet-4-5-20250929)
2. Pricing Lookup: Looks up pricing in config/pricing.json using the model ID
3. Cost Calculation: Calculates costs using the model-specific rates:
4. Input cost = (input_tokens × input_price) / 1,000,000
5. Output cost = (output_tokens × output_price) / 1,000,000
6. Cache read cost = (cache_read_tokens × cache_read_price) / 1,000,000
7. Cache write cost = (cache_write_tokens × cache_write_price) / 1,000,000
8. Total cost = sum of all costs
9. Fallback: If the model isn't found, uses the default pricing

Adding a New Model¶

To add pricing for a new model:

1. Find the exact model ID (check session transcript or CSV)
2. Get current pricing from Anthropic Pricing
3. Add entry to config/pricing.json:

{
  "models": {
    "new-model-id-here": {
      "name": "Model Display Name",
      "input": 0.00,
      "output": 0.00,
      "cache_read": 0.00,
      "cache_write": 0.00
    }
  }
}

Updating Pricing¶

When Anthropic updates their pricing:

1. Update the rates in config/pricing.json
2. Add a note in the notes array with the date
3. Costs will be calculated with new rates for all future sessions

Note: Existing session data in the CSV is not recalculated. Historical costs remain as originally calculated.

Viewing Model Usage¶

To see which models are being used in your sessions:

# View unique models used
cut -d, -f28 ~/.claude/session-logs/sessions.csv | sort | uniq -c

# Cost by model
awk -F, 'NR>1 {cost[$28]+=$21} END {for(m in cost) print m": $"cost[m]}' ~/.claude/session-logs/sessions.csv

Troubleshooting¶

Costs seem incorrect¶

1. Check that the model ID in your CSV matches an entry in config/pricing.json
2. Verify pricing matches current Anthropic rates
3. Check that the pricing.json file has valid JSON syntax

Model not found¶

If a model isn't in the config file, the default pricing is used. Add the model to config/pricing.json to get accurate costs.

Back to Configuration Overview