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Grok 4.20 0309

Grok 4.20 0309 is an AI model from xAI.

Publisher
xAI
Family
Grok
Input
Output
Released
10 Mar 2026

Cite

Notes

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Attribution

Benchmark scores
AAVals AILech Mazur
Attribution policy →
Input
$2
/1M tok
Output
$6
/1M tok
Blended
$3
#397/ 461/1M · 3:1
Speed
0
#115/ 461tok/s

Price & speed via Artificial Analysis · ranked across tracked models

Reasoning effortIndexSpeed
Reasoning37.40 t/s
Non-reasoning22.90 t/s

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

Reported on 18 evals across 11 domains - best 78.5% on GPQA Diamond · #110 of 497

Reported eval scores

18
Humanity's Last Exam (HLE)24.5
Vals Index17.6
GPQA Diamond78.5
SciCode32.2
τ²-bench (Tau²-bench)69.6
Terminal-Bench (Hard)22
IFBench47.8
TaxEval v274.1
CorpFin v263.7
Finance Agent (v2)28.5
MortgageTax45.4
Thematic Generalization Benchmark63.8
SAGE38.2
ProofBench14
MedCode32.2
MedScribe63.4
Vibe Code Bench v1.14.1
Vals Multimodal Index39.1