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Grok 4 vs Claude Sonnet 4.6

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

Verdict

Claude Sonnet 4.6 leads on LMSYS ELO (1368 vs 1358). Claude Sonnet 4.6 is ~1.3× 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

Anthropic

The workhorse. Near-Opus quality at 1/5 the cost. The default choice for production code and agent workloads.

Excellent cost/quality ratioFast inferenceGreat for Cursor/Claude Code

Pricing

Input / 1M$5.00$3.00

Output / 1M$15.00$15.00

Context256K500K

Max output32K64K

LicenseProprietaryProprietary

Released2026-03-012025-11-04

Benchmarks

LMSYS ELO1358.01368.0

MMLU Pro86.288.7

HumanEval88.492.1

SWE-Bench—64.5

MATH86.585.0

GPQA—59.4

MMMU—74.1

IFEval85.090.5

Per-task cost

Summarize a 1-hour meeting transcript$0.082$0.052

Review a 500-line pull request$0.070$0.054

Answer a customer support ticket$0.027$0.021

Extract structured data from a resume$0.040$0.030

Debug a stack trace with context$0.060$0.048

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

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