# Cost Tracking

News Agent automatically tracks and displays the cost of each run in your daily email digest.

## Features

- **Per-Run Cost**: Shows exactly how much each digest cost to generate
- **Cumulative Total**: Tracks total spending across all runs
- **Database Storage**: All cost data saved in SQLite database
- **Email Display**: Costs shown at the bottom of every digest email

## How It Works

1. **OpenRouter API Returns Costs**: Each API call includes cost information
2. **Client Tracks Session Cost**: Accumulates cost during the run
3. **Database Stores Run Data**: Saves cost along with article counts
4. **Email Shows Costs**: Displays both session and cumulative costs

## Email Display

At the bottom of each digest email, you'll see:

```
💰 Cost Information
This digest: $0.0234  |  Total spent: $1.2456
```

- **This digest**: Cost for generating this specific email (filtering + summarization)
- **Total spent**: Cumulative cost across all runs since you started using the system

## View Cost Statistics

Run the cost viewer script:

```bash
cd ~/news-agent
source .venv/bin/activate
python -m src.view_costs
```

**Example output:**
```
============================================================
News Agent Cost Statistics
============================================================

💰 Total Cumulative Cost: $1.2456

Recent Runs (last 20):
------------------------------------------------------------
Date         Articles   Included   Cost      
------------------------------------------------------------
2026-01-26   152        15         $0.0234   
2026-01-25   143        12         $0.0198   
2026-01-24   167        15         $0.0245   
...
------------------------------------------------------------

Averages (last 20 runs):
  Cost per run: $0.0226
  Articles per digest: 14.2
  Cost per article: $0.0016

============================================================
```

## Cost Breakdown

### Typical Costs (with `openai/gpt-4o-mini`)

| Operation | Articles | Cost |
|-----------|----------|------|
| Filtering | 150 articles | ~$0.015-0.020 |
| Summarization | 15 articles | ~$0.005-0.008 |
| **Total per run** | - | **~$0.020-0.028** |

### Monthly Estimates

| Frequency | Cost/Run | Monthly Cost |
|-----------|----------|--------------|
| Daily | $0.025 | ~$0.75/month |
| Daily | $0.030 | ~$0.90/month |

**Note:** Actual costs vary based on:
- Number of articles fetched
- Content length
- Model used
- Number of articles passing filter

## Cost Optimization Tips

### 1. Adjust Filtering Threshold

Higher threshold = fewer articles = lower cost:

```yaml
ai:
  filtering:
    min_score: 7.0  # Stricter (was 5.5)
    max_articles: 10  # Fewer articles (was 15)
```

### 2. Use Cheaper Models

```yaml
ai:
  model: "google/gemini-2.0-flash-exp:free"  # FREE (has rate limits)
  # OR
  model: "openai/gpt-4o-mini"  # Cheap and reliable
```

### 3. Reduce RSS Sources

Fewer sources = fewer articles = lower cost:

```yaml
sources:
  rss:
    # Comment out sources you don't need
```

### 4. Track and Set Budget Alerts

Monitor costs and adjust:

```bash
# View costs regularly
python -m src.view_costs

# If costs are too high, adjust config.yaml settings
```

## Database Schema

The `runs` table stores:

```sql
CREATE TABLE runs (
    id INTEGER PRIMARY KEY,
    run_date TEXT NOT NULL,
    articles_fetched INTEGER NOT NULL,
    articles_processed INTEGER NOT NULL,
    articles_included INTEGER NOT NULL,
    total_cost REAL NOT NULL,
    filtering_cost REAL DEFAULT 0,
    summarization_cost REAL DEFAULT 0,
    created_at TEXT NOT NULL
);
```

## Query Costs Manually

Using SQLite:

```bash
sqlite3 data/articles.db

-- Total cost
SELECT SUM(total_cost) FROM runs;

-- Cost by date
SELECT run_date, total_cost FROM runs ORDER BY run_date DESC;

-- Average cost
SELECT AVG(total_cost) FROM runs;

-- Cost this month
SELECT SUM(total_cost) FROM runs 
WHERE run_date >= date('now', 'start of month');
```

## Troubleshooting

### Cost Shows $0.0000

**Possible causes:**

1. **Using free model** - Free models may not report costs
2. **API response format** - OpenRouter might not include cost field
3. **First run** - Database just initialized

**Check:**
```bash
# View logs for cost tracking
grep -i "cost" data/logs/news-agent.log

# Check if runs are being saved
sqlite3 data/articles.db "SELECT * FROM runs ORDER BY created_at DESC LIMIT 5;"
```

### Cost Seems Wrong

**Verify model pricing:**
- Check https://openrouter.ai/models for current pricing
- Different models have different costs
- Costs change over time

**Check API responses:**
```bash
# Enable debug logging
# Edit config.yaml:
logging:
  level: "DEBUG"

# Run and check logs
python -m src.main
grep "cost" data/logs/news-agent.log
```

## Export Cost Data

Export to CSV:

```bash
sqlite3 -header -csv data/articles.db \
  "SELECT run_date, articles_processed, articles_included, total_cost 
   FROM runs ORDER BY run_date" > costs.csv
```

Import into Excel/Sheets for analysis.

## Cost Projections

Based on current usage, project future costs:

```python
# Get average cost
python -m src.view_costs

# Multiply by days
# If avg = $0.025/day:
# - Weekly: $0.025 × 7 = $0.175
# - Monthly: $0.025 × 30 = $0.75
# - Yearly: $0.025 × 365 = $9.13
```

## Privacy Note

All cost data is stored **locally** in your SQLite database (`data/articles.db`). No cost information is sent anywhere except:
- Displayed in your email (which you control)
- Stored in your local database

## Future Enhancements

Potential improvements:

1. **Split costs** - Separate filtering vs summarization costs
2. **Budget alerts** - Email warning if cost exceeds threshold
3. **Cost predictions** - Estimate next run cost
4. **Web dashboard** - Visualize cost trends over time
5. **Cost per category** - Track which categories cost most

## Need Help?

- View current costs: `python -m src.view_costs`
- Check database: `sqlite3 data/articles.db "SELECT * FROM runs;"`
- Review logs: `tail -f data/logs/news-agent.log`
- OpenRouter pricing: https://openrouter.ai/models