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gemini-3-pro-image-vertex vs gemini-4-argon
Attribute	Gemini 3 Pro Image (Google Vertex AI)gemini-3-pro-image-vertex	Gemini 4 Argongemini-4-argon
Pricing
Request	$0.134 / request	—
Billing	Pay Per Request	—
Cache Write (5m)	Not applicable	$2.00 / 1M
Cache Write (1h)	Not applicable	$2.00 / 1M
Cache Read	Not applicable	$2.00 / 1M
Input	—	$2.00 / 1M
Output	—	$10.00 / 1M
Web Search	—	$0 / 1M
Context
Max context	N/A	1M
Max output	N/A	N/A
Capabilities
Vision	Yes	Yes
Function Calling	No	Yes
JSON Mode	No	Yes
Streaming	No	Yes
Catalogue
Provider	Google	Google
Category	image	chat
Charge type	Pay Per Request	Pay As You Go
Released	—	—
Description
Summary	Gemini 3 Pro Image served from Google Vertex AI. Billed per image at US$0.134. Call it through /v1/chat/completions with stream set to false; the image is returned in the message content as a base64 data URI.	Gemini 4 Argon is Google's flagship reasoning model, built for complex software engineering, deep mathematical and scientific problem solving, and autonomous multi-step agents. Google trained it to keep context across long, multi-step tasks and to turn long documents mixing text, tables, charts and images into a single grounded output. It leads the Vals Index across finance, legal, coding and tax work, and supports long decode of up to 1M output tokens in a single response.