Cost Optimization Intermediate

Understanding how Claude Code costs work and applying smart optimization strategies can reduce your spending by 50% or more without sacrificing quality. Learn token economics, model selection, and budget management.

Token Usage Breakdown

Every Claude Code interaction involves two types of tokens:

Model Selection Impact

# Use Sonnet for routine tasks (default)
$ claude -p "Add input validation to the signup form"

# Switch to Opus for complex tasks
$ claude -p "Redesign the caching layer to support Redis Cluster" --model claude-opus-4-20250514

# In interactive mode, switch models mid-session
> /model claude-opus-4-20250514

Cost-Saving Strategies

1. Use /compact Regularly

The /compact command summarizes the conversation, dramatically reducing input tokens for subsequent turns:

# After 10 turns of conversation (~50K tokens accumulated)
> /compact

# Conversation is summarized to ~5K tokens
# Next 10 turns cost 90% less in input tokens!

2. Write Shorter, More Specific Prompts

# Expensive: vague prompt causes Claude to search and read many files
> I think there's a bug somewhere in the auth system, can you find it?

# Cheap: direct prompt, Claude goes straight to the fix
> Fix the null check on line 45 of src/auth/session.ts - it should check for undefined too

3. Use -p for Quick Tasks

One-shot mode has zero conversation overhead - no history accumulation:

# Each call is independent - no growing context
$ claude -p "Fix the typo on line 12 of README.md"
$ claude -p "Add a .gitignore entry for .env.local"
$ claude -p "Remove the unused import on line 3 of src/app.ts"

4. Leverage Caching

Claude Code benefits from prompt caching when conversation prefixes are reused. This happens automatically - your CLAUDE.md content and early conversation history are cached across turns.

5. Monitor with /cost

# Check current session cost
> /cost

# Output example:
# Session cost: $0.47
# Input tokens: 125,430
# Output tokens: 8,210
# Cache hits: 89,200 tokens (saved ~$0.25)

Cost Comparison: Task Types

Monthly Cost Estimation

Setting Budget Alerts

Set up monitoring to prevent unexpected costs:

• Check the Anthropic Console for usage dashboards and spending limits
• Set monthly spending limits on your API key
• Use /cost at the end of each session to track trends
• Create a simple tracking script that logs daily costs