Grok 4

retired

xAI · Frontier

Previous xAI flagship. Retired May 15, 2026; traffic redirected to Grok 4.3.

Strengths: A former xAI flagship with strong general reasoning for its generation.
Best for: Reference only — traffic now redirects to Grok 4.3.
Limitations: Retired May 2026; no longer served directly.

Input / 1M

$3.00

Output / 1M

$15.00

Cached input / 1M

$0.75

Context window

256K

Where it sits

66% above the frontier median

blended $/Mtok across 24 frontier models

Output costs 5× input

$3.00 in / $15.00 out per 1M

Cached input saves 75%

$0.75 vs $3.00 per 1M fresh

Held flat since launch (Jul 2025)

no blended price change recorded

Computed live from current prices and this model's history — not hand-written, so it stays accurate as prices move.

Only one price on record so far — the history chart appears once a price changes.

Effective	Input	Output	Cached in	Note	Source
9 Jul 2025	$3.00	$15.00	$0.75		docs.x.ai

Grok Build 0.1

Mid

in $1.00 · out $2.00

Grok 4.3

Frontier

in $1.25 · out $2.50

Grok 4.20 Multi-Agent

Mid

in $2.00 · out $6.00

Grok 4.20

Frontier

in $1.25 · out $2.50