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Gemini vs. ChatGPT

LLM Comparison


Gemini

Gemini

Overview

Gemini is Google's multimodal model family for consumer, developer, and enterprise applications. The current generation includes Gemini 3.5 for fast agentic workflows and Gemini 3.1 Pro for complex reasoning.


Google introduced Bard in March 2023 and renamed the product Gemini in February 2024. The Gemini family combines text, image, audio, video, code, and tool-use capabilities across the Gemini app, Gemini API, Vertex AI, and Google's productivity products. Gemini 3.1 Pro arrived in February 2026, followed by the faster Gemini 3.5 generation at Google I/O 2026.


Initial release: 2023-03-21

Current generation: Gemini 3.5

ChatGPT

ChatGPT

Overview

ChatGPT is OpenAI's consumer and business AI product, powered by the GPT model family. GPT-5.6 is the current generation for advanced reasoning, coding, computer use, and professional work.


ChatGPT launched in November 2022 on GPT-3.5 and later added GPT-4, GPT-4o, the o-series reasoning models, and GPT-5. OpenAI released GPT-5.6 in July 2026 across ChatGPT, Codex, and the API. The generation includes the flagship Sol tier, the balanced Terra tier, and the fast, cost-efficient Luna tier. GPT-5.5 Instant remains available for fast everyday conversations, while GPT-5.6 powers higher-effort reasoning options on eligible plans.


Initial release: 2022-11-30

Current generation: GPT-5.6

Gemini

ChatGPT

Products & Features
Instruct Models
Coding Capability
Customization
Finetuning
Open Source
License NA NA
Model Sizes Undisclosed Undisclosed