GPT-5 vs DeepSeek V4 Pro for email drafting: which is better in 2026?
A head-to-head look at GPT-5 and DeepSeek V4 Pro for email drafting. Benchmarks via artificialanalysis.ai, pricing as of May 2026. Compare AI models like these inside Admix.
Quick verdict
For email drafting in May 2026, DeepSeek V4 Pro edges out GPT-5 on the inputPricePerMTok metric. Cheapest frontier-class pricing.
Side-by-side specs
| Spec | GPT-5 | DeepSeek |
|---|---|---|
| Intelligence index | 78.4 | 72.8 |
| Coding index | 76.1 | 74.5 |
| Context window | 400K tokens | 256K tokens |
| Speed (tok/s) | 142 | 120 |
| Input $/M | $5.00 | $0.27 |
| Output $/M | $20.00 | $1.10 |
| Released | Aug 7, 2025 | Mar 4, 2026 |
How they handle email drafting
GPT-5: Top reasoning and math scores. The main caveat is more expensive than mid-tier models.
DeepSeek V4 Pro: Cheapest frontier-class pricing. The main caveat is weaker english creative writing.
Cost per 1,000 queries
Assuming 1,500 input and 800 output tokens per query:
- GPT-5: $23.50 per 1,000 queries
- DeepSeek V4 Pro: $1.29 per 1,000 queries
Verdict by sub-task
- Best raw quality on email drafting:
- Best price: DeepSeek V4 Pro
- Longest context: GPT-5
- Fastest: GPT-5
FAQ
Is GPT-5 better than DeepSeek V4 Pro for email drafting?
On May 2026 benchmarks (artificialanalysis.ai), DeepSeek V4 Pro ranks higher than GPT-5 for email drafting on the inputPricePerMTok metric. The gap is small enough that the choice often comes down to price, context length, and tone.
Which is cheaper, GPT-5 or DeepSeek V4 Pro?
GPT-5 costs $5.00 input and $20.00 output per million tokens. DeepSeek V4 Pro costs $0.27 input and $1.10 output per million tokens.
Can I use both GPT-5 and DeepSeek in one app?
Yes. Admix is a multi model AI chat aggregator that lets you run GPT-5 and DeepSeek V4 Pro side by side under one subscription.
Sources
Benchmarks from artificialanalysis.ai (May 2026).
Related
Try both GPT-5 and DeepSeek in Admix
One subscription, side-by-side answers, no API plumbing. From $8.99/mo.
Try Admix free