What Is ChatGPT?

ChatGPT is OpenAI’s conversational AI product, built on their GPT (Generative Pre-trained Transformer) series of large language models. It launched in November 2022 and rapidly became the most widely used AI chatbot.

ChatGPT Models

Model	Released	Key Features
GPT-3.5	2022	Fast, cheap, good for simple tasks
GPT-4	2023	Stronger reasoning, multimodal
GPT-4o	2024	Faster GPT-4, native audio
o1 / o3	2024-25	Advanced reasoning, chain-of-thought
GPT-5 series	2025-26	Sol, Terra, and Luna tiers
GPT-6 Astra	2026	Frontier reasoning, 1M+ context

Limitations

• Web-only by default: ChatGPT runs in a browser — no native desktop integration
• Single provider: Locked to OpenAI models only
• No local models: Can’t run offline or use open-source models
• Subscription cost: Paid tiers required for the newest models and higher limits
• Privacy concerns: Conversations may be used for training (unless opted out)

ChatGPT Alternatives

Power users who want more flexibility often use AI clients that support multiple providers:

• Use Claude for long-context analysis
• Use GPT-5.6 for quick general tasks
• Use local models via Ollama for private work
• Switch between models mid-conversation

Beyond ChatGPT with Elvean

Elvean gives you access to OpenAI’s models via your own API key — plus Claude, Gemini, Grok, local models, and more. All in one native Mac app with tools ChatGPT doesn’t offer: MCP servers, interactive charts, maps, and threaded conversations.