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DeepSeek R2 vs Grok 4

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

Verdict

DeepSeek R2 is ~7.8× cheaper on a 3:1 input:output blend. DeepSeek R2 is open-weights, the other is proprietary.

DeepSeek

DeepSeek’s reasoning variant. Competes with o4 on math at a fraction of the cost.

Frontier math at open-weights pricingLong CoT traces

xAI

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$0.55$5.00

Output / 1M$2.19$15.00

Context128K256K

Max output64K32K

LicenseOpen weightsProprietary

Released2026-01-152026-03-01

Benchmarks

LMSYS ELO—1358.0

MMLU Pro87.886.2

HumanEval90.188.4

MATH94.186.5

GPQA71.2—

IFEval—85.0

Per-task cost

Summarize a 1-hour meeting transcript$0.0093$0.082

Review a 500-line pull request$0.0088$0.070

Answer a customer support ticket$0.0034$0.027

Extract structured data from a resume$0.0049$0.040

Debug a stack trace with context$0.0077$0.060

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

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