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Grok 4 vs GPT-5 Turbo

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

Verdict

GPT-5 Turbo leads on LMSYS ELO (1398 vs 1358). Grok 4 is ~1.4× cheaper on a 3:1 input:output blend.

xAI

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

Live web/X accessPersonalityFast inference on Colossus

OpenAI

OpenAI’s flagship unified model. Handles text, vision, and audio natively. The generalist benchmark champion.

Native multimodalStrong math and scienceHuge ecosystem

Pricing

Input / 1M$5.00$6.00

Output / 1M$15.00$24.00

Context256K400K

Max output32K32K

LicenseProprietaryProprietary

Released2026-03-012026-01-21

Benchmarks

LMSYS ELO1358.01398.0

MMLU Pro86.291.2

HumanEval88.493.0

SWE-Bench—65.8

MATH86.591.5

GPQA—68.1

MMMU—78.8

IFEval85.088.9

Per-task cost

Summarize a 1-hour meeting transcript$0.082$0.102

Review a 500-line pull request$0.070$0.096

Answer a customer support ticket$0.027$0.037

Extract structured data from a resume$0.040$0.054

Debug a stack trace with context$0.060$0.084

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

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