Claude Haiku 4.5 vs Gemini 3 Flash for email drafting: which is better in 2026?

A head-to-head look at Claude Haiku 4.5 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 Claude Haiku 4.5 on the inputPricePerMTok metric. Fastest mainstream model.

Side-by-side specs

Spec	Haiku	Flash
Intelligence index	65.8	63.2
Coding index	66.2	60.5
Context window	500K tokens	1M tokens
Speed (tok/s)	205	260
Input $/M	$0.80	$0.15
Output $/M	$4.00	$0.60
Released	Mar 19, 2026	Feb 12, 2026

How they handle email drafting

Claude Haiku 4.5: Best tone-to-price ratio for client-facing email.

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:

Claude Haiku 4.5: $4.40 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 Claude Haiku 4.5 better than Gemini 3 Flash for email drafting?

On May 2026 benchmarks (artificialanalysis.ai), Gemini 3 Flash ranks higher than Claude Haiku 4.5 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, Claude Haiku 4.5 or Gemini 3 Flash?

Claude Haiku 4.5 costs $0.80 input and $4.00 output per million tokens. Gemini 3 Flash costs $0.15 input and $0.60 output per million tokens.

Can I use both Haiku and Flash in one app?

Yes. Admix is a multi model AI chat aggregator that lets you run Claude Haiku 4.5 and Gemini 3 Flash side by side under one subscription.

Sources

Benchmarks from artificialanalysis.ai (May 2026).

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