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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
#406/ 472/1M · 3:1
Speed
0
#116/ 472tok/s

Price & speed via Artificial Analysis · ranked across tracked models

Reasoning effortIndexSpeed
Reasoning25.20 t/s
Non-reasoning14.60 t/s

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

Reported on 18 evals across 11 domains - best 96.5% on τ²-bench (Tau²-bench) · #12 of 321

Reported eval scores

18
IFBench82.9
Terminal-Bench (Hard)40.9
τ²-bench (Tau²-bench)96.5
GPQA Diamond88.5
SciCode44.7
Humanity's Last Exam (HLE)32.4
Vals Index17.6
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