Gemini 3 Pro vs DeepSeek V4 Pro for legal writing: which is better in 2026?

A head-to-head look at Gemini 3 Pro and DeepSeek V4 Pro for legal writing. Benchmarks via artificialanalysis.ai, pricing as of May 2026. Compare AI models like these inside Admix.

Quick verdict

For legal writing in May 2026, Gemini 3 Pro edges out DeepSeek V4 Pro on the contextWindow metric. Largest context for ingesting full case files at once.

Side-by-side specs

Spec	Gemini	DeepSeek
Intelligence index	75.6	72.8
Coding index	73.4	74.5
Context window	2M tokens	256K tokens
Speed (tok/s)	165	120
Input $/M	$2.50	$0.27
Output $/M	$10.00	$1.10
Released	Feb 12, 2026	Mar 4, 2026

How they handle legal writing

Gemini 3 Pro: Largest context for ingesting full case files at once.

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:

Gemini 3 Pro: $11.75 per 1,000 queries
DeepSeek V4 Pro: $1.29 per 1,000 queries

Verdict by sub-task

Best raw quality on legal writing:
Best price: DeepSeek V4 Pro
Longest context: Gemini 3 Pro
Fastest: Gemini 3 Pro

FAQ

Is Gemini 3 Pro better than DeepSeek V4 Pro for legal writing?

On May 2026 benchmarks (artificialanalysis.ai), Gemini 3 Pro ranks higher than DeepSeek V4 Pro for legal writing on the contextWindow metric. The gap is small enough that the choice often comes down to price, context length, and tone.

Which is cheaper, Gemini 3 Pro or DeepSeek V4 Pro?

Gemini 3 Pro costs $2.50 input and $10.00 output per million tokens. DeepSeek V4 Pro costs $0.27 input and $1.10 output per million tokens.

Can I use both Gemini and DeepSeek in one app?

Yes. Admix is a multi model AI chat aggregator that lets you run Gemini 3 Pro and DeepSeek V4 Pro side by side under one subscription.

Sources

Benchmarks from artificialanalysis.ai (May 2026).

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