Best LLMs for Code Review (2026)
Large language models that excel at automated code review — identifying bugs, security issues, style violations, and suggesting improvements across multiple languages.
Why Claude Sonnet 4 is Best for Code Review
Claude Sonnet 4 ranks highest for this use case based on Arena ELO score, benchmark performance, and capability coverage. It provides the best combination of quality, speed, and reliability for these specific tasks.
Cost Estimate
For a typical workload (~50M tokens/month, 60% input / 40% output), the cheapest qualifying model (DeepSeek V3) costs approximately $16.07/month. The most capable model may cost more but delivers higher quality results.
Price vs Quality for Code Review
Top 5 Models Compared
| Rank | Model | Provider | Input $/M | Output $/M | Arena ELO | Speed (tok/s) |
|---|---|---|---|---|---|---|
| #1 | Claude Sonnet 4 | Anthropic | $2.00 | $10.00 | 1473 | 78 |
| #2 | Claude Opus 4 | Anthropic | $5.00 | $25.00 | 1497 | 50 |
| #3 | GPT-4o | OpenAI | $2.50 | $10.00 | 1162 | 95 |
| #4 | GPT-4 1 | OpenAI | $2.00 | $8.00 | 1200 | 85 |
| #5 | Gemini 2.5 Pro | $1.25 | $10.00 | 1445 | 70 |
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