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DeepSeek V4 vs Grok 4

DeepSeek vs xAI. Specs, benchmarks, and real per-task cost — all in one page.

Verdict

Grok 4 leads on LMSYS ELO (1358 vs 1334). DeepSeek V4 is ~42.9× cheaper on a 3:1 input:output blend. DeepSeek V4 is open-weights, the other is proprietary.

DeepSeek

DeepSeek V4

The shock-the-market moment of 2026. Frontier coding quality at 1/50th the price of Opus.

Unbeatable $/qualityOpen weightsGreat at code

xAI

Grok 4

xAI’s latest. Real-time X search integration, strong on current events and meme-literate tasks.

Live web/X accessPersonalityFast inference on Colossus

Pricing

Input / 1M$0.14$5.00

Output / 1M$0.28$15.00

Context128K256K

Max output16K32K

LicenseOpen weightsProprietary

Released2026-02-202026-03-01

Benchmarks

LMSYS ELO1334.01358.0

MMLU Pro85.486.2

HumanEval91.588.4

SWE-Bench54.1—

MATH88.786.5

IFEval85.885.0

Per-task cost

Summarize a 1-hour meeting transcript$0.0022$0.082

Review a 500-line pull request$0.0017$0.070

Answer a customer support ticket$0.0006$0.027

Extract structured data from a resume$0.0010$0.040

Debug a stack trace with context$0.0014$0.060

Per-call cost using published token counts for each task. Real-world prompts vary.

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