ChatGPT (OpenAI)
Also known as: ChatGPT, OpenAI ChatGPT, GPT-5
ChatGPT is OpenAI’s AI assistant and the most widely used AI tool worldwide. Users phrase tasks in natural language; the system responds based on large language models. Since its launch in 2022, ChatGPT has evolved from a chatbot into a work platform with file analysis, image processing, and agent features.
Current models
The GPT-6 model family has powered ChatGPT since September 2026. The flagship GPT-6 Astra launched on 03.09.2026. The GPT-5.5 models belong to the previous generation, and older generations such as GPT-4o have been retired. LLM inference runs on OpenAI infrastructure.
ChatGPT vs. ChatGPT Enterprise
Companies choose between two tiers. ChatGPT Business (from 25 US dollars per user/month) offers shared workspaces and an admin console. ChatGPT Enterprise adds SSO, audit logs, role-based access, and data residency. Neither plan uses company data for model training.
Strengths
ChatGPT stands out for its functional breadth, multimodality (text, image, voice), and a large ecosystem of integrations and custom GPTs. Its wide adoption lowers the barrier to entry for teams.
Data protection
OpenAI is a US provider. Enterprise customers can choose EU data residency, in some regions with in-region inference. The US legal framework still applies, a relevant point for digital sovereignty. A comparison with Claude is worthwhile: the Claude cheat sheet shows the differences in practice.
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Stand: Oktober 2026
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