GPT-6.1 Sol vs Gemini 4 Argon

Short answer: neither wins at everything.

Pick GPT-6.1 Sol if you want OpenAI's current main model for paid ChatGPT plans and for developers.

Pick Gemini 4 Argon if you want Google's newest top model, which reads text, pictures, video and audio.

GPT-6.1 Sol vs Gemini 4 Argon side by side

	GPT-6.1 Sol	Gemini 4 Argon
What it is	OpenAI's main model on paid ChatGPT plans	Google's newest top model
Made by	OpenAI	Google
Price	Developer price: $2 in and $10 out per million tokens	Developer price: $2 in and $10 out per million tokens
Good at	Reads up to 1,050,000 tokens at once; Reads: text, image, PDFs	Reads up to 1,048,576 tokens at once; Reads: text, image, video, audio, PDFs
Privacy	Not listed in our data	Paid developer service tier: from Oct 26, 2026, new projects store Generate Content requests by default (store=true); existing projects keep their setting. Opt out with store=false per request or turn off logging in the Logs and Datasets settings
Where it runs	ChatGPT Plus/Pro	Google AI Pro/Ultra
Status	Current	Current. Generally available Oct 13, 2026. developer service price doubles Dec 1, 2026: $2/$10 per million tokens through Nov 30, then $4/$20. Not on the developer service free tier. Also in Google Antigravity (desktop app and command line) for Google AI Pro and Ultra subscribers (since Oct 13, per Google's Antigravity blog)
Sources	chatgpt.com · models.dev	gemini.google · models.dev · ai.google.dev · ai.google.dev (2) · antigravity.google

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Questions people ask

Is GPT-6.1 Sol or Gemini 4 Argon better?

It depends on what you do. Pick GPT-6.1 Sol if you want OpenAI's current main model for paid ChatGPT plans and for developers. Pick Gemini 4 Argon if you want Google's newest top model, which reads text, pictures, video and audio.

How does WhichBot decide?

Hector uses a written rubric: everyday usefulness, cost and free plans, privacy, reliability, ease of use, availability and safety. Rankings are one input, not the answer.

Facts come from the companies' own pages, linked above, and were last checked Oct 28, 2026. Prices are US and can change. Picks are Hector's: no paid picks, sponsors always labeled, and no sponsorship from AI labs. Our policy.