OpenAI's ChatGPT brought generative AI to the mainstream. The ecosystem extends beyond the chat UI and includes production APIs, custom GPT experiences, and agent-oriented tooling.
OpenAI updates model availability over time. For production work, always rely on the official OpenAI model reference and changelog instead of hardcoded model assumptions in app code or prompts.
| Capability | What it gives you | Where to verify |
|---|---|---|
| Responses API | Unified text + tool orchestration entrypoint | OpenAI API docs |
| Function / Tool Calling | Structured execution against external systems | OpenAI API docs |
| Web Search / File Search / Computer Use | Hosted tools for grounded and agentic workflows | OpenAI platform docs |
| Realtime | Low-latency interactive voice and streaming scenarios | OpenAI API docs |
A good prompt provides Context, Task, Instructions, and Formatting Guidelines. Instead of asking "Write a blog post about AI," try: "Act as a senior tech writer. Write a 500-word blog post about the impact of AI on web development. Use a professional but accessible tone, and structure it with H2 headers and bullet points."