To get access to GPT (the latest GPT-5 or earlier versions):
- Use ChatGPT:
- If you subscribe to ChatGPT Plus ($20/month) or Pro, GPT-5 is available to you directly on chat.openai.com as the default model or selectable in the model picker.
- Free tier users also have access to GPT-5 with some usage limits, with broader rollout ongoing.
- Enterprise and EDU users get access as well.
- OpenAI API:
- Sign up for an OpenAI developer account at platform.openai.com.
- After registration, generate API keys to integrate GPT models into apps.
- You start with free credits (e.g., $5) to test the service.
- This is a good option for developers wanting custom AI integration.
- Alternatives and platforms:
- Services like Chatbase allow use of GPT models without coding by uploading data and connecting via their API.
- Third-party platforms (like Poe) sometimes offer limited free access to GPT-4o or similar.
In summary, the easiest way is via ChatGPT subscription or free tier on the official OpenAI website for personal use. For development or custom apps, sign up at OpenAI and use the API with API keys you generate. GPT-5 is widely available now via these means.