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Prices, specs and price history side by side. Data as of 2026-08-01

GPT-5.4×Grok 4.20×Clear

Spec	GPT-5.4OpenAI	Grok 4.20xAI
Provider	OpenAI	xAI
Context window	1.1M	2M
Max output	128K	-
Modalities	text, image, file → text	text, image, file → text
Open source	No	No
License	-	-
Released	-	-
Status	active	active
Input$ / 1M	2.5	1.25cheapest
Output$ / 1M	15	2.5cheapest
Cached$ / 1M	0.25	0.2cheapest
Channel	openrouter	openrouter

Price history

Overlaid price history. Solid = verified by us, dashed = estimated (archive).

GPT-5.4Grok 4.20verified by usestimated (archive)

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