ChatGPT5.2 vs. Gemini3.0 – Differences, advantages and disadvantages
- Thomas Eisen
- Jan 6
- 2 min read
Introduction
In December 2025, OpenAI introduced its most powerful ChatGPT generation to date, GPT-5.2. Shortly thereafter, Google DeepMind released Gemini 3.0, considered its new flagship for multimodal AI. This short article highlights the key differences and application areas of the two models.
ChatGPT 5.2
ChatGPT 5.2 is available in Instant , Thinking , and Pro versions. The models deliver reliably structured answers, as the hallucination rate has been significantly reduced compared to its predecessor. The Thinking version can process up to 256,000 tokens in context, enabling long documents and complex analyses. Simultaneously, the vision module has been improved, resulting in better recognition of graphics and user interfaces, and tool integration has been expanded: ChatGPT can securely call external tools and coordinate complex workflows. Knowledge base coverage extends to August 2025.
Advantages of ChatGPT 5.2
More reliable answers and fewer hallucinations.
Excellent processing of long texts and improvements in image analysis.
Flexible choice between fast (Instant) and thorough (Thinking/Pro) models.
Disadvantages
Higher performance is only available in paid subscriptions.
Thinking and Pro respond more slowly than Instant.
Strong ties to the OpenAI ecosystem.
Gemini 3.0
Gemini 3.0 is considered the most intelligent model from Google DeepMind. The Pro version achieves top scores in numerous benchmarks and can handle text, images, video, audio, and code. A particularly striking feature is its enormous context window, capable of holding up to one million tokens, allowing for the processing of very large documents. The optional Deep Think mode enhances reasoning performance for especially challenging tasks. Furthermore, Gemini is integrated with numerous Google services and can operate as a standalone coding agent within the new Antigravity platform.
Advantages of Gemini 3.0
Very high benchmark performance and strong reasoning capabilities.
Huge context window and powerful multimodality.
Deep Think mode and integration into Google products.
Disadvantages
Many features require a paid subscription or are still in preview.
Less openness to external platforms than ChatGPT.
Unclear knowledge cutoff.
Key differences at a glance
aspect | ChatGPT 5.2 | Gemini 3.0 |
Context window | Up to 256k tokens | Up to 1 million tokens |
Multimodality | Text + improved vision module | Full multi-modality (text, image, video, audio, code) |
Reasoning & Benchmarks | More reliable answers, strong tool usage | Leading in many benchmarks, Deep-Think mode |
Availability | Instant, Thinking and Pro via ChatGPT subscriptions | Pro and Deep-Think, integrated into Google platforms |
Cost | Pro/Thinking is a paid service | Some features are only available with an AI Ultra subscription. |
Conclusion
ChatGPT 5.2 scores points with its high reliability, flexible models, and good tool integration. It is particularly suitable for structured answers, programming support, and longer text analyses. Gemini 3.0 impresses with outstanding reasoning capabilities, an enormous context window, and true multimodality. Those who want to process large amounts of data from various media and are comfortable within the Google ecosystem will find the right tool here. Both systems have their place – the decisive factors are your own requirements for speed, scope, and integration.
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