The Hidden Cost of AI Coding Assistants
You signed up for Claude Code or Copilot thinking it'd be $20/month. Then the bill came: $150. What happened?
The Three Hidden Costs
1. Context Window Bloat
Every time you paste a file, ask a question, or reference code, you're sending tokens. Most developers don't realize that a single "Can you fix this bug?" prompt can cost $0.50–$1.00 if it includes a large file.
2. Retry Loops
When the AI doesn't get it right the first time, you retry. And retry. And retry. Each attempt costs the same as the first. A "simple" fix that takes 5 attempts costs 5x what you expected.
3. Background Processes
Some AI tools run in the background — indexing your codebase, suggesting completions, analyzing patterns. These invisible processes consume tokens you never see.
Real Numbers
From a survey of 50 developers:
What You Can Do
1. **Monitor in real time.** Use CostDog to see exactly what you're spending.
2. **Set budget alerts.** Get warned before you hit $50/day.
3. **Choose models wisely.** Use Haiku for simple tasks, Sonnet for most work, Opus only when needed.
4. **Compress context.** Use `/compact` regularly to reduce token usage.
The Bottom Line
AI coding assistants are worth the cost — but only if you know what the cost is. Visibility is the first step to control.