General-purpose assistantOpenAI
A conversational AI assistant from OpenAI, available on the web, iOS and Android. The official pricing page lists individual plans including Free, Go, Plus and Pro, as well as Business and Enterprise plans for organizations.
General-purpose assistantAnthropic
An AI assistant from Anthropic, offering free and paid individual plans. The official pricing page states that all paid plans include Claude Code.
General-purpose assistantGoogle
Google's AI assistant, free to use with a Google account. The Taiwan subscription page lists paid plans including Google AI Plus, AI Pro and AI Ultra, priced in New Taiwan dollars.