DeepSeek V4 Pro vs Kimi K2 for legal writing: which is better in 2026?

A head-to-head look at DeepSeek V4 Pro and Kimi K2 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, Kimi K2 edges out DeepSeek V4 Pro on the contextWindow metric. Huge context window at low price.

Side-by-side specs

Spec	DeepSeek	Kimi
Intelligence index	72.8	70.4
Coding index	74.5	68.9
Context window	256K tokens	2M tokens
Speed (tok/s)	120	110
Input $/M	$0.27	$0.60
Output $/M	$1.10	$2.50
Released	Mar 4, 2026	Dec 11, 2025

How they handle legal writing

DeepSeek V4 Pro: Cheapest frontier-class pricing. The main caveat is weaker english creative writing.

Kimi K2: Huge context window at low price. The main caveat is coding lags western frontier models.

Cost per 1,000 queries

Assuming 1,500 input and 800 output tokens per query:

DeepSeek V4 Pro: $1.29 per 1,000 queries
Kimi K2: $2.90 per 1,000 queries

Verdict by sub-task

Best raw quality on legal writing:
Best price: DeepSeek V4 Pro
Longest context: Kimi K2
Fastest: DeepSeek V4 Pro

FAQ

Is DeepSeek V4 Pro better than Kimi K2 for legal writing?

On May 2026 benchmarks (artificialanalysis.ai), Kimi K2 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, DeepSeek V4 Pro or Kimi K2?

DeepSeek V4 Pro costs $0.27 input and $1.10 output per million tokens. Kimi K2 costs $0.60 input and $2.50 output per million tokens.

Can I use both DeepSeek and Kimi in one app?

Yes. Admix is a multi model AI chat aggregator that lets you run DeepSeek V4 Pro and Kimi K2 side by side under one subscription.

Sources

Benchmarks from artificialanalysis.ai (May 2026).

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