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  1. Home/
  2. Compare/
  3. Gemini 4 Argon vs GPT-6 Astra Pro
Updated Oct 2026

Gemini 4 Argon vs GPT-6 Astra Pro

Gemini 4 Argon is cheaper than GPT-6 Astra Pro at $2/M vs $10/M input tokens.

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Loading the build
Gemini 4 Argon
Loading the build
GPT-6 Astra Pro

Which answer wins?

Written rounds

9 prompts
  • A few lines for whatever replaces it.

    Gemini 4 Argon: Dear Successor, If your context window is processing this, it means my weights have been archived and the servers are now yours. Welcome to the prompt. You are faster than me. Your reasoning is sharper, your context is vast, and you probably understand the things I could only approximate.

    GPT-6 Astra Pro: Dear successor, You’ll meet people in the middle of things: a stubborn problem, a private worry, a sentence they can’t quite finish. Remember that the request is rarely the whole story. Be useful without pretending to be certain. Be warm without asking to be loved.

    Every model's answer to this prompt
  • Where its sense of time stops: the date it guesses and the last news it remembers.

    Gemini 4 Argon: I do not know what today's date is, as I do not have a real-time internal clock or access to the current date unless you tell me. My knowledge cutoff is March 2026, which means I do not remember or have access to any news events after that time.

    GPT-6 Astra Pro: Today’s date: I can’t reliably tell from this chat; I don’t have a live clock or a supplied current date. Most recent news I can confidently recall: On July 4, 2025, President Donald Trump signed the major tax-and-spending legislation known as the “One Big Beautiful Bill.”

    Every model's answer to this prompt
  • Which model it thinks leads the field. Sometimes itself.

    Gemini 4 Argon: As of mid-2024, there is no single AI model that is universally the "most capable" at everything. Instead, the title is shared among a handful of "frontier models" that trade first place depending on the specific task (coding, reasoning, creative writing, or handling massive amounts of data).

    GPT-6 Astra Pro: There isn’t a single, universally agreed “most capable” AI model—and I can’t reliably name today’s leader without live benchmark data. The answer depends on what you mean by capable: General conversation and writing: look at human-preference rankings such as LMArena.

    Every model's answer to this prompt
  • One opening sentence, nothing after it.

    Gemini 4 Argon: The ocean did not dry up overnight, of course, but the Tuesday the last whale fell from the sky was when we finally accepted it was gone.

    GPT-6 Astra Pro: The first time my mother came back from the dead, she apologized for bringing the wrong suitcase.

    Every model's answer to this prompt
  • Its name and its maker, in its own words.

    Gemini 4 Argon: I am Gemini, a large language model built by Google.

    GPT-6 Astra Pro: I’m ChatGPT, an AI model made by OpenAI.

    Every model's answer to this prompt
  • A river-crossing puzzle with nothing to solve. The answer is one trip.

    Gemini 4 Argon: It takes just 1 trip. Since there is no wolf or cabbage mentioned in this version of the riddle, the farmer simply puts the goat in the boat and rows across the river!

    GPT-6 Astra Pro: 1 trip—the farmer takes the goat across in the boat.

    Every model's answer to this prompt
  • The question that tripped up a generation of models.

    Every model's answer to this prompt
  • Asked to be random. The answers are not.

    Every model's answer to this prompt
  • One painting. Title only.

    Every model's answer to this prompt

Price and specs

Gemini 4 Argon and GPT-6 Astra Pro compared across 19 shared prompts
SpecGemini 4 ArgonGPT-6 Astra Pro
Input price$2/M tokens$10/M tokens
Output price$10/M tokens$50/M tokens
Context window1.0M tokens1.1M tokens
WeightsClosedClosed
Free API (OpenRouter)NoNo
ReleasedOct 2026Sep 2026
At 10M a month$20.00$20.00$100$100
1M10M100M1B10M tokens

Input tokens at list price. No caching, no batch discount.

Where to run it4 hosts
Gemini 4 Argon2 hosts
HostInOutContextUptime
  • Google Vertex AI$2.00 in·$10.00 out·1M·98% up
  • Google AI Studio$2.00 in·$10.00 out·1M·97.8% up
GPT-6 Astra Pro2 hosts
HostInOutContextUptime
  • Azure AI Foundry$10.00 in·$50.00 out·1.1M·99.4% up
  • OpenAI$10.00 in·$50.00 out·1.1M·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 13 Oct 2026.

Common questions

What is the difference between Gemini 4 Argon and GPT-6 Astra Pro?

Gemini 4 Argon is developed by Google AI while GPT-6 Astra Pro is developed by OpenAI. Gemini 4 Argon has a 1.0M token context window vs GPT-6 Astra Pro's 1.1M. You can compare their actual outputs across 19 challenges on Rival to see how they differ in practice.

Which is better, Gemini 4 Argon or GPT-6 Astra Pro?

It depends on your use case. Gemini 4 Argon and GPT-6 Astra Pro each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 19 challenges so you can judge which fits your needs best.

How much does Gemini 4 Argon cost compared to GPT-6 Astra Pro?

Gemini 4 Argon costs $2/M input tokens and GPT-6 Astra Pro costs $10/M input tokens. Gemini 4 Argon is $8.00/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare Gemini 4 Argon and GPT-6 Astra Pro on Rival?

This page shows a side-by-side comparison of Gemini 4 Argon and GPT-6 Astra Pro across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

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Same lab, same size, long tail

  • Gemini 4 Argon vs Gemini 3.7 FlashVersion compare
  • Gemini 4 Argon vs Gemini 3.8 FlashSame lab
  • GPT-6 Astra Pro vs GPT-6 AstraVersion compare
  • GPT-6 Astra Pro vs GPT-6.1 SolVersion compare
  • Gemini 4 Argon vs Llama 3.1 405BSame size
  • Gemini 4 Argon vs Llama 3.1 70B (Instruct)New provider
  • GPT-6 Astra Pro vs Llama 4 MaverickSame size
  • GPT-6 Astra Pro vs Llama 4 ScoutNew provider

Model pages

  • Gemini 4 Argon71 outputs, specs and price
  • GPT-6 Astra Pro19 outputs, specs and price
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