grok-4.20

Grok 4.20 is a reasoning model from SpaceXAI with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherance, delivering...

LLM & Generative AI 1 model 1 listings snapshot Oct 14, 2026, 12:43 AM

Platforms

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Cheapest OpenRouter no official benchmark Input$1.25 Output$2.50 per 1M tokens Fastest OpenRouter lowest p50 latency on this board 128.1 ms p50 Most free quota — largest published free allowance — free tier

Model variants

W3r9 dedup — same model + identical tags merge; prices are listed per billing form

Model	Provider	Tags	Input /1M	Output /1M
x-ai/grok-4.20	OpenRouter	2M contextmultimodalreasoning	$1.25	$2.50

Capabilities

official design_arena & architecture metadata

Design Arena Elo official design_arena benchmark (OpenRouter)

website 1232 · 51.8% wr
codecategories 1224 · 51.8% wr
dataviz 1219 · 52.0% wr
uicomponent 1201 · 49.0% wr
gamedev 1197 · 50.1% wr
3d 1194 · 52.1% wr
htmlslides 1180 · 45.7% wr
asciiart 1177 · 48.2% wr
svg 1164 · 52.4% wr
webapps 1138 · 49.7% wr
godotgamedev 1089 · 38.5% wr
mobileapps 1087 · 45.4% wr

Input / Output modalities modality: text+image+file->text

text in+out
image input only

Platform details

per provider

provider	model	Input /1M	Output /1M	Latency ?	Official $/1M	Availability	Data time
OpenRouter	x-ai/grok-4.20	$1.25	$2.50	128.1 ms	—	100% available	2026-10-14 00:43:21
xAI Official	grok-4.20-0309-non-reasoning	$1.25	$2.50	—	$1.25	—	2026-10-14 00:54:15

2 rows · snapshot 2026-10-14 00:43:21 · from data/public/prices.json + measurements.json