ChatGPT
OpenAI's conversational assistant, launched November 30, 2022, which ignited the global generative AI wave — now powered by GPT-5 with agentic capabilities.
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ByteDance's AI assistant launched August 2023 — one of China's most-used AI apps, covering chat, image generation and voice calls.
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Claude
Anthropic's AI assistant, launched March 2023, known for long-context handling and coding — the current flagship is Claude Opus 4.5.
Gemini
Google's AI assistant, rebranded from Bard in February 2024, deeply integrated with Search and Workspace, now driven by Gemini 3.
Microsoft Copilot
Microsoft's unified AI assistant since November 2023, spanning Windows, Edge and Microsoft 365.