GPT-5 Mini vs Gemini 3 Flash for email drafting: which is better in 2026?
A head-to-head look at GPT-5 Mini and Gemini 3 Flash 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, Gemini 3 Flash edges out GPT-5 Mini on the inputPricePerMTok metric. Fastest mainstream model.
Side-by-side specs
| Spec | GPT-5 Mini | Flash |
|---|---|---|
| Intelligence index | 64.5 | 63.2 |
| Coding index | 61.0 | 60.5 |
| Context window | 200K tokens | 1M tokens |
| Speed (tok/s) | 220 | 260 |
| Input $/M | $0.25 | $0.15 |
| Output $/M | $1.00 | $0.60 |
| Released | Sep 10, 2025 | Feb 12, 2026 |
How they handle email drafting
GPT-5 Mini: Cheap and fast enough to embed in every inbox.
Gemini 3 Flash: Fastest mainstream model. The main caveat is weaker on nuanced reasoning.
Cost per 1,000 queries
Assuming 1,500 input and 800 output tokens per query:
- GPT-5 Mini: $1.18 per 1,000 queries
- Gemini 3 Flash: $0.70 per 1,000 queries
Verdict by sub-task
- Best raw quality on email drafting:
- Best price: Gemini 3 Flash
- Longest context: Gemini 3 Flash
- Fastest: Gemini 3 Flash
FAQ
Is GPT-5 Mini better than Gemini 3 Flash for email drafting?
On May 2026 benchmarks (artificialanalysis.ai), Gemini 3 Flash ranks higher than GPT-5 Mini 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 Mini or Gemini 3 Flash?
GPT-5 Mini costs $0.25 input and $1.00 output per million tokens. Gemini 3 Flash costs $0.15 input and $0.60 output per million tokens.
Can I use both GPT-5 Mini and Flash in one app?
Yes. Admix is a multi model AI chat aggregator that lets you run GPT-5 Mini and Gemini 3 Flash side by side under one subscription.
Sources
Benchmarks from artificialanalysis.ai (May 2026).
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