Best AI Model for Email & Business Writing
Drafting emails, business proposals, reports, and professional communications. Needs good tone control and conciseness.
Our Verdict
GPT-4o Mini at $0.15/$0.60 is genuinely all you need for most business emails. It handles tone, formatting, and conciseness well. If you need higher quality for executive communications, Claude Sonnet 4.6 gives more polished output. Gemini 2.5 Flash at $0.15/$0.60 is equally capable and cheaper on output. Flagships are complete overkill here — don't spend $5+ per million tokens on emails.
Top Picks
Best cost-to-quality for emails — handles tone and formatting well
Best for: Standard business email
Input
$0.15/1M
Output
$0.6/1M
Context
128K
Max Output
16K
More polished, natural-sounding output for important communications
Best for: Executive and client-facing email
Input
$3/1M
Output
$15/1M
Context
200K
Max Output
16K
Equally capable at $0.15/$0.60 with 1M context for email threads
Best for: Email with long thread context
Input
$0.15/1M
Output
$0.6/1M
Context
1M
Max Output
66K
What Matters for Email Writing
Key Factors
- •Writing quality
- •Tone control
- •Speed
- •Cost
Tips
- ✓This is one area where budget models genuinely perform well
- ✓GPT-4o Mini at $0.15/$0.60 handles business writing excellently
- ✓Flagships are overkill for most email tasks
Full Ranking (All Compatible Models)
| Rank | Model | Input | Output | Avg Bench | Score |
|---|---|---|---|---|---|
| #1 | Gemini 2.5 FlashGoogle | $0.15 | $0.60 | 82.8% | 122 |
| #2 | GPT-4o MiniOpenAI | $0.15 | $0.60 | 77.6% | 105 |
| #3 | GLM-4.7Zhipu AI | $0.60 | $2.20 | 85.0% | 92 |
| #4 | Gemini 3 FlashGoogle | $0.50 | $3.00 | 84.0% | 89 |
| #5 | MiniMax M2.5MiniMax | $0.30 | $1.20 | 86.0% | 85 |
| #6 | o3OpenAI | $0.40 | $1.60 | 86.9% | 85 |
| #7 | DeepSeek R1DeepSeek | $0.55 | $2.19 | 82.5% | 82 |
| #8 | Claude Sonnet 4.6Anthropic | $3.00 | $15.00 | 83.3% | 82 |
| #9 | Gemini 2.5 ProGoogle | $1.25 | $10.00 | 85.7% | 79 |
| #10 | o4-miniOpenAI | $1.10 | $4.40 | 84.8% | 77 |
| #11 | Mistral Medium 3Mistral | $0.40 | $2.00 | 81.5% | 76 |
| #12 | Llama 4 MaverickMeta | $0.31 | $0.85 | 85.3% | 76 |
| #13 | Llama 4 ScoutMeta | $0.18 | $0.63 | 80.1% | 76 |
| #14 | GLM-5Zhipu AI | $1.00 | $3.20 | 77.8% | 76 |
| #15 | DeepSeek V3DeepSeek | $0.14 | $0.28 | 83.5% | 74 |
| #16 | Gemini 3.1 ProGoogle | $2.00 | $12.00 | 93.4% | 67 |
| #17 | Claude Haiku 4.5Anthropic | $0.80 | $4.00 | 78.8% | 67 |
| #18 | Gemini 3 ProGoogle | $2.00 | $12.00 | 86.9% | 67 |
| #19 | GPT-5.2 CodexOpenAI | $1.75 | $14.00 | 86.8% | 65 |
| #20 | GPT-5.3 CodexOpenAI | $2.00 | $16.00 | 88.2% | 63 |
| #21 | GPT-4oOpenAI | $2.50 | $10.00 | 78.6% | 61 |
| #22 | Mistral Large 3Mistral | $2.00 | $5.00 | 87.0% | 59 |
| #23 | Claude Sonnet 4.5Anthropic | $3.00 | $15.00 | 81.9% | 56 |
| #24 | GPT-5OpenAI | $1.25 | $10.00 | 85.7% | 55 |
| #25 | Grok 4xAI | $3.00 | $15.00 | 83.7% | 47 |
| #26 | Claude Opus 4.6Anthropic | $5.00 | $25.00 | 86.7% | 42 |