How Much Does AI Code Review Cost?
AI code review costs $0.01-$0.05 per small PR (under 500 lines) using budget models, or $0.10-$0.50 per PR using premium models like Claude Opus 4. At 100 PRs/day, expect $3-$50/month.
Cost Per Pull Request by Size and Model
| Model | Small PR (~200 lines) | Medium PR (~500 lines) | Large PR (~2000 lines) |
|---|---|---|---|
| Claude Sonnet 4 | $0.0210 | $0.0465 | $0.1200 |
| GPT-4o | $0.0155 | $0.0350 | $0.0925 |
| Claude Haiku 4 | $0.0056 | $0.0124 | $0.0320 |
| GPT-4o Mini | <$0.001 | $0.0021 | $0.0055 |
| DeepSeek V3 | $0.0017 | $0.0038 | $0.0101 |
Monthly Cost at Scale (100 PRs/day)
| Model | Small PRs | Medium PRs | Mixed |
|---|---|---|---|
| Claude Sonnet 4 | $63.00 | $139.50 | $101.25 |
| GPT-4o | $46.50 | $105.00 | $75.75 |
| Claude Haiku 4 | $16.80 | $37.20 | $27.00 |
| GPT-4o Mini | $2.79 | $6.30 | $4.54 |
| DeepSeek V3 | $5.07 | $11.43 | $8.25 |
Best Models for Code Review
- Claude Sonnet 4 — Best overall for code review: strong at finding bugs, good value at $3/$15
- DeepSeek V3 — Budget option with strong coding ability at $0.27/$1.10
- GPT-4o — Good all-rounder, especially for multi-language codebases
- Claude Haiku 4 — Best for lint-level checks and simple reviews at scale
FAQ
Which AI model is best for code review?
Claude Sonnet 4 offers the best balance of code understanding and cost at $3/$15 per 1M tokens. For budget code review, DeepSeek V3 at $0.27/$1.10 provides strong coding ability at a fraction of the cost.
How many tokens does a code review use?
A small PR (200 lines) uses about 3,000 input tokens. A large PR (2,000 lines) uses about 25,000 input tokens. Output is typically 800-3,000 tokens for review comments.
Is AI code review worth the cost?
At $0.01-$0.50 per PR, AI code review is extremely cost-effective compared to engineer time ($50-150/hour). It catches common issues, enforces style, and frees senior engineers for deeper reviews.
Prices last verified: April 2026. Pricing may change — always check provider websites for current rates.
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