WhichAI / Models / Grok 4.20

Grok 4.20

· verified October 13, 2026

public paid api vision long-context

Provider

Statuspublic

AA Intelligence Index25.7 (official, read October 13, 2026)

Released2026-03-31

Context window2M

ModalitiesText + image + files

API price $/1M (in / out)$1.25 / $2.5 (OpenRouter)

Speedn/a

AccessAPI $1.25/$2.5 per 1M tokens on OpenRouter · listed March 31, 2026

In one line

Grok 4.20 by xAI, measured by Artificial Analysis at 25.7 on the Intelligence Index. Added to WhichAI automatically from live data on October 13, 2026: no editorial review yet, so judge it by the numbers, not by a verdict. OpenRouter's description: “Grok 4.20 is a reasoning model from SpaceXAI with industry-leading speed and agentic tool calling capabilities.”

Alternatives worth a look

Inkling Small (Thinking Machines Lab) · AA 25.7API $0.45/$1.2 per 1M tokens on OpenRouter · free route on OpenRouter (thinkingmachines/inkling-small:free) · open weights · listed July 30, 2026
MiMo-V2.5-Pro (Xiaomi) · AA 26Xiaomi cloud & devices (closed)
GLM-5.1 (Z.ai) · AA 26.1Open weights

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Artificial Analysis Intelligence Index, official scale (the number published on artificialanalysis.ai), relayed by OpenRouter and refreshed automatically: last read October 13, 2026. 210 models carry a current official measurement. A value marked ~ is converted from an earlier snapshot because no current measurement is published; an unmeasured model is never ranked. Context, price, modality and listing dates come from the public OpenRouter model list (refreshed automatically on the live site; static copy retrieved October 3, 2026) and vendor pages. Missing values are not published or not yet verified - shown as -. Sources are linked inside the app (the Ranking chapter and About > Methodology).