Best AI Model for Legal Document Analysis
Analyzing contracts, legal briefs, regulatory documents, and case law. Needs large context and precise language understanding.
Our Verdict
Gemini 3.1 Pro is the best fit — 1M context handles entire contracts, 91% MMLU-Pro for language precision, and $2 input means you can analyze thick legal documents affordably. Claude Opus 4.6 is the precision pick when you need nuanced interpretation of complex clauses. For volume work (reviewing many contracts), Gemini 2.5 Flash at $0.15 input with 1M context is unbeatable on cost.
Top Picks
1M context + 91% MMLU-Pro — handles entire contracts with strong comprehension
Best for: Full contract analysis
Input
$2/1M
Output
$12/1M
Context
1M
Max Output
64K
Most precise language understanding for nuanced clause interpretation
Best for: Complex legal reasoning
Input
$5/1M
Output
$25/1M
Context
200K
Max Output
32K
1M context at $0.15 input for bulk contract review
Best for: High-volume document review
Input
$0.15/1M
Output
$0.6/1M
Context
1M
Max Output
66K
What Matters for Legal
Key Factors
- •Context window
- •Precision
- •MMLU-Pro score
- •Instruction following
Tips
- ✓Legal documents are long — 1M context models can handle entire contracts
- ✓Precision matters more than creativity here
- ✓Gemini's 1M context at $2 input is excellent value for document analysis
Full Ranking (All Compatible Models)
| Rank | Model | Input | Output | MMLU-Pro | Score |
|---|---|---|---|---|---|
| #1 | Gemini 3.1 ProGoogle | $2.00 | $12.00 | 91% | 133 |
| #2 | Gemini 2.5 FlashGoogle | $0.15 | $0.60 | 76% | 127 |
| #3 | Gemini 2.5 ProGoogle | $1.25 | $10.00 | 87.5% | 108 |
| #4 | Gemini 3 ProGoogle | $2.00 | $12.00 | 89.8% | 107 |
| #5 | Gemini 3 FlashGoogle | $0.50 | $3.00 | 78% | 99 |
| #6 | Claude Opus 4.6Anthropic | $5.00 | $25.00 | 89.5% | 97 |
| #7 | GLM-4.7Zhipu AI | $0.60 | $2.20 | 84.3% | 89 |
| #8 | Llama 4 MaverickMeta | $0.31 | $0.85 | 80.5% | 83 |
| #9 | GPT-5.2 CodexOpenAI | $1.75 | $14.00 | 89% | 82 |
| #10 | GLM-5Zhipu AI | $1.00 | $3.20 | 70.4% | 82 |
| #11 | GPT-5.3 CodexOpenAI | $2.00 | $16.00 | 90% | 82 |
| #12 | Llama 4 ScoutMeta | $0.18 | $0.63 | 74.2% | 81 |
| #13 | o3OpenAI | $0.40 | $1.60 | 87% | 81 |
| #14 | MiniMax M2.5MiniMax | $0.30 | $1.20 | 82% | 79 |
| #15 | o4-miniOpenAI | $1.10 | $4.40 | 85% | 76 |
| #16 | DeepSeek R1DeepSeek | $0.55 | $2.19 | 84% | 76 |
| #17 | Mistral Large 3Mistral | $2.00 | $5.00 | 83% | 75 |
| #18 | GPT-5OpenAI | $1.25 | $10.00 | 88.5% | 75 |
| #19 | Claude Sonnet 4.6Anthropic | $3.00 | $15.00 | 86% | 72 |
| #20 | Claude Sonnet 4.5Anthropic | $3.00 | $15.00 | 84.5% | 72 |
| #21 | DeepSeek V3DeepSeek | $0.14 | $0.28 | 78% | 71 |
| #22 | Grok 4xAI | $3.00 | $15.00 | 86% | 70 |
| #23 | Mistral Medium 3Mistral | $0.40 | $2.00 | 76% | 61 |
| #24 | GPT-4oOpenAI | $2.50 | $10.00 | 80.5% | 56 |
| #25 | GPT-4o MiniOpenAI | $0.15 | $0.60 | 68% | 50 |
| #26 | Claude Haiku 4.5Anthropic | $0.80 | $4.00 | 69.4% | 47 |