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Gemini 4 Carbon vs GPT-6 Astra

1 website built from the same prompts — one by each model, nothing added. Compare real results side by side, then copy the prompt and try it in your own tool.

Gemini 4 CarbonGoogle · 15 sites · CursorGPT-6 AstraOpenAI · 6 sites · Codex

Templates built by both models

  1. Solar System 3D Explainer

    Pro prompt →
    Solar System 3D Explainer built with Gemini 4 CarbonGemini 4 Carbon

    Gemini 4 Carbon: The Solar System · Cursor

    Solar System 3D Explainer built with GPT-6 AstraGPT-6 Astra

    GPT-6 Astra: The Solar System · Codex

FAQ

Gemini 4 Carbon vs GPT-6 Astra

Gemini 4 Carbon vs GPT-6 Astra: which is better for building websites?

It depends on the site. Here are 1 template where both models built the same prompt — mostly interactive explainer (1) — so you can compare real results instead of benchmarks. Open any pair to try both live demos.

Gemini 4 Carbon or GPT-6 Astra for 3D websites?

1 of the shared templates uses 3D / WebGL: Solar System 3D Explainer. Both builds of each are live, so compare how each model handled the scene, performance and mobile layout.

Gemini 4 Carbon or GPT-6 Astra: which writes bigger projects?

On these 1 prompt, Gemini 4 Carbon's builds shipped a median of 14 files and GPT-6 Astra's 16. More files is not better or worse on its own — open the demos and compare.

Which coding tools ran Gemini 4 Carbon and GPT-6 Astra?

Gemini 4 Carbon ran in Cursor; GPT-6 Astra ran in Codex. The prompt text was identical.

Did Gemini 4 Carbon and GPT-6 Astra really get the same prompt?

Yes. For each template, Gemini 4 Carbon and GPT-6 Astra got the same published prompt, with nothing added. Each build fills the [VARIABLES] (brand name, copy) with its own values, so the content differs while the brief stays the same.

Can I run the Gemini 4 Carbon vs GPT-6 Astra prompts myself?

Yes. Every template in this Gemini 4 Carbon vs GPT-6 Astra comparison has its full prompt on its template page (Pro templates show it to Pro members). Paste it into your AI coding tool with your own values and compare your result with both demos.