Why it matters
- Widely used for drafting, explanation, and coding help.
- Supports file uploads and tool use in-session.
- Same model family available via OpenAI API for integration.
Key capabilities
- Multi-turn chat with context retention.
- Code generation and explanation.
- Optional browsing and advanced tools (subscription).
Technical notes
- API: separate product, the OpenAI API.
- Self-hosted: no.
- License: proprietary.
- Models: GPT-6.1 Sol, GPT-6 Astra, GPT-6 Sol and GPT-6 Luna; GPT-5.6 models remain as older options.
- Plans: Free, Go, Plus and Pro for individuals; Business and Enterprise for teams.
Ideal for
- Everyday assistant use, coding help, and writing.
- Teams on Plus / Business / Enterprise plans.
Not ideal for
- Privacy-sensitive workloads that cannot leave your network.
- Pure API integration (use OpenAI API).
See also
- OpenAI GPT: the model family behind ChatGPT.
- OpenAI API: build on the same models in your own app.
- Claude: Anthropic's assistant, the closest alternative.
Sources
- ChatGPT plans and pricing (OpenAI)
- OpenAI models (OpenAI API docs)