Grok 4.3

Name: Grok 4.3
Author: xAI

Grok 4.3 is an AI model from xAI.

Publisher: xAI
Family: Grok
Context: 1M
Input
Output
License: proprietary
Released: 30 Apr 2026

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Notes

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Attribution

Benchmark scores: AA LiveBench Vals AI EQ-Bench Lech Mazur

Attribution policy →

Context

Weights

Closed

API only

Input

$1.25

/1M tok

Output

$2.50

/1M tok

Blended

$1.56

#402/ 493/1M · 3:1

Speed

#103/ 492tok/s

Cache read

$0.20

0.16x input

Price & speed via Artificial Analysis · ranked across tracked models · caching via OpenRouter

Reasoning effort	Index	Speed
high	24.9	0 t/s
medium	24.8	0 t/s
low	24.3	0 t/s
Non-reasoning	14.0	0 t/s

Intelligence Index per reasoning-effort setting, via Artificial Analysis · pricing identical across tiers

Reported on 26 evals across 12 domains - best 97.7% on τ²-bench (Tau²-bench) · #9 of 321

Reported eval scores

IFBench81.3

Terminal-Bench (Hard)37.9

LiveBench - Language73.6

LiveBench - Coding69.9

LiveBench - Math84.3

LiveBench - Instruction Following62.7

LiveBench - Reasoning70.8

LiveBench - Data Analysis55.8

τ²-bench (Tau²-bench)97.7

CorpFin v268.5

TaxEval v270.8

Finance Agent (v2)37.7

MortgageTax48.3

GPQA Diamond90.1

SciCode37.4

Humanity's Last Exam (HLE)37.2

LiveBench69.5

Vals Index24.3

MedCode38.1

MedScribe74.4