Best AI Model for Code Review & Security Audit
Reviewing pull requests, finding bugs, security vulnerabilities, and suggesting improvements. Needs large context and strong code understanding.
Our Verdict
Claude Opus 4.6 is the gold standard for code review — 95% HumanEval, tool-use for codebase navigation, and the reasoning depth to catch subtle bugs. Claude Sonnet 4.6 is the value pick at $3/$15 with 94% HumanEval. For large codebases, Gemini 3.1 Pro's 1M context lets you load entire repos. Input cost matters most here — you're reading lots of code and outputting short reviews.
Top Picks
Best at catching subtle bugs and security issues with deep reasoning
Best for: Security audits and complex reviews
Input
$5/1M
Output
$25/1M
Context
200K
Max Output
32K
Input
$3/1M
Output
$15/1M
Context
200K
Max Output
16K
1M context — load entire codebases for comprehensive review
Best for: Large codebase reviews
Input
$2/1M
Output
$12/1M
Context
1M
Max Output
64K
What Matters for Code Review
Key Factors
- •Context window
- •HumanEval score
- •Security knowledge
- •Precision
Tips
- ✓Large context is key — you need to fit entire files or PRs
- ✓Flagship models catch more subtle bugs and security issues
- ✓Input cost dominates (reading lots of code, generating short reviews)
Full Ranking (All Compatible Models)
| Rank | Model | Input | Output | HumanEval | Score |
|---|---|---|---|---|---|
| #1 | Gemini 3.1 ProGoogle | $2.00 | $12.00 | 95% | 152 |
| #2 | Gemini 2.5 ProGoogle | $1.25 | $10.00 | 93.5% | 128 |
| #3 | Gemini 3 ProGoogle | $2.00 | $12.00 | 94% | 127 |
| #4 | Claude Opus 4.6Anthropic | $5.00 | $25.00 | 95% | 124 |
| #5 | Claude Sonnet 4.6Anthropic | $3.00 | $15.00 | 94% | 123 |
| #6 | Gemini 2.5 FlashGoogle | $0.15 | $0.60 | 89.5% | 122 |
| #7 | Gemini 3 FlashGoogle | $0.50 | $3.00 | 90% | 120 |
| #8 | GLM-5Zhipu AI | $1.00 | $3.20 | 91% | 114 |
| #9 | GPT-5.2 CodexOpenAI | $1.75 | $14.00 | 95.5% | 111 |
| #10 | GPT-5.3 CodexOpenAI | $2.00 | $16.00 | 96.5% | 111 |
| #11 | o3OpenAI | $0.40 | $1.60 | 94.5% | 107 |
| #12 | o4-miniOpenAI | $1.10 | $4.40 | 93.5% | 104 |
| #13 | GPT-5OpenAI | $1.25 | $10.00 | 95% | 100 |
| #14 | Mistral Large 3Mistral | $2.00 | $5.00 | 91% | 100 |
| #15 | Claude Sonnet 4.5Anthropic | $3.00 | $15.00 | 93% | 98 |
| #16 | Grok 4xAI | $3.00 | $15.00 | 93% | 96 |
| #17 | MiniMax M2.5MiniMax | $0.30 | $1.20 | 90% | 91 |
| #18 | DeepSeek R1DeepSeek | $0.55 | $2.19 | 92% | 89 |
| #19 | Mistral Medium 3Mistral | $0.40 | $2.00 | 87% | 86 |
| #20 | Llama 4 MaverickMeta | $0.31 | $0.85 | 90.2% | 85 |
| #21 | GLM-4.7Zhipu AI | $0.60 | $2.20 | 85.0% | 84 |
| #22 | Llama 4 ScoutMeta | $0.18 | $0.63 | 86% | 83 |
| #23 | GPT-4oOpenAI | $2.50 | $10.00 | 91% | 82 |
| #24 | DeepSeek V3DeepSeek | $0.14 | $0.28 | 89% | 80 |
| #25 | GPT-4o MiniOpenAI | $0.15 | $0.60 | 87.2% | 78 |
| #26 | Claude Haiku 4.5Anthropic | $0.80 | $4.00 | 88.1% | 74 |