Email drafting cost drivers
Email drafting combines moderate personalization context with repeat volume, making output caps and template caching practical cost controls.
Workload cost scenario
AI Email Drafting API Cost Calculator
Estimate monthly API spend for personalized email drafting with short context and controlled response length.
Product and operations teams adding assisted email composition.
Lowest tracked estimate
$36.40
Gemini 2.5 Flash-Lite for the current assumptions
Lowest cost does not mean best model. Test output quality, latency, retries, and reliability on your own workload.
Cost comparison
Estimated monthly cost by model
Comparing 22 models that fit the initial input length.
| Model | Provider | Input cost | Output cost | Monthly estimate | Context usage |
|---|---|---|---|---|---|
| Gemini 2.5 Flash-Lite | $16.40 | $20.00 | $36.40 | 0.2% | |
| DeepSeek V4 Flash non-thinking | DeepSeek | $22.51 | $14.00 | $36.51 | 0.2% |
| GPT-4o mini | OpenAI | $27.00 | $30.00 | $57.00 | 1.6% |
| gpt-5.4-nano | OpenAI | $32.80 | $62.50 | $95.30 | 0.5% |
| deepseek-v4-pro | DeepSeek | $69.75 | $43.50 | $113.25 | 0.2% |
| Gemini 3.5 Live Translate Preview | $41.00 | $75.00 | $116.00 | 1.5% | |
| Gemini 3.1 Flash-Lite | $41.00 | $75.00 | $116.00 | 0.2% | |
| Gemini 2.5 Flash | $49.20 | $125.00 | $174.20 | 0.2% | |
| Gemini 3 Flash Preview | $82.00 | $150.00 | $232.00 | 0.2% | |
| gpt-5.4-mini | OpenAI | $123.00 | $225.00 | $348.00 | 0.5% |
| Claude Haiku 4.5 | Anthropic | $164.00 | $250.00 | $414.00 | 1.0% |
| gpt-5.6-luna | OpenAI | $164.00 | $300.00 | $464.00 | 0.2% |
| Gemini 3.5 Flash | $246.00 | $450.00 | $696.00 | 0.2% | |
| Gemini 2.5 Pro | $205.00 | $500.00 | $705.00 | 0.2% | |
| Claude Sonnet 5 | Anthropic | $328.00 | $500.00 | $828.00 | 0.2% |
| Gemini 3.1 Pro Preview | $328.00 | $600.00 | $928.00 | 0.2% | |
| GPT-4o | OpenAI | $450.00 | $500.00 | $950.00 | 1.6% |
| gpt-5.6-terra | OpenAI | $410.00 | $750.00 | $1,160.00 | 0.2% |
| Claude Sonnet 4.6 | Anthropic | $492.00 | $750.00 | $1,242.00 | 0.2% |
| Claude Opus 4.8 | Anthropic | $820.00 | $1,250.00 | $2,070.00 | 0.2% |
| gpt-5.6-sol | OpenAI | $820.00 | $1,500.00 | $2,320.00 | 0.2% |
| Claude Fable 5 | Anthropic | $2,000.00 | $2,500.00 | $4,500.00 | 0.2% |
What to measure
- Separate generation from regeneration requests.
- Cap drafts to the intended email length.
- Reuse stable tone and policy instructions where cached input is available.
Estimate boundary: Deliverability, CRM, enrichment, and human review costs are not included.
View pricing sources
OpenAI model pricingHigh confidenceChecked 2026-07-13
Tracked prices for included OpenAI models are checked against official provider documentation.
Anthropic model pricingHigh confidenceChecked 2026-07-12
Tracked prices for included Anthropic models are checked against official provider documentation.
Google model pricingHigh confidenceChecked 2026-07-14
Tracked prices for included Google models are checked against official provider documentation.
DeepSeek model pricingHigh confidenceChecked 2026-07-12
Tracked prices for included DeepSeek models are checked against official provider documentation.
Anthropic model pricingHigh confidenceChecked 2026-07-14
Tracked prices for included Anthropic models are checked against official provider documentation.