What is it

ChatGPT is OpenAI's flagship AI product and the platform that sparked the modern AI revolution. It is now a unified workspace where one conversation reaches across text, code, voice, vision, image generation, web research, and autonomous agents.

What it can do

Powered by the GPT-5.5 model family (GPT-5.5 Instant as the default model on all plans, GPT-5.5 Thinking on Plus and above for advanced reasoning, GPT-5.5 Pro on Pro/Enterprise for the highest-capability work, plus GPT-5 Thinking Mini and legacy models). Capabilities include Codex coding agent, Deep Research, Agent Mode, persistent Memory with sources, Custom GPTs, Projects (shareable), scheduled Tasks, Canvas, voice and voice-with-video, vision, image generation (including thinking-grade image generation), Excel/Google Sheets extensions, and 60+ connected apps (Slack, Google Drive, SharePoint, GitHub, Atlassian, and more).

Who is it for

Universal tool for everyone from students and casual users to software engineers, researchers, analysts, and enterprise teams who need one assistant for reasoning, coding, research, and agentic work.

Key Features

GPT-5.5 Model Family – Adaptive Intelligence for Every Task

ChatGPT offers a full spectrum of models tuned for different trade-offs between speed, cost, and reasoning depth. GPT-5.5 Instant serves as the default daily driver for all plans, delivering tighter and more accurate answers with 52.5% fewer hallucinated claims on high-stakes prompts than its predecessor. GPT-5.5 Thinking unlocks advanced multi-step reasoning for professional workloads on Plus and above, while GPT-5.5 Pro on the Pro plan provides the highest-capability tier for strategic analysis and complex coding where revision is expensive. GPT-5 Thinking Mini and legacy models remain available for compatibility and lower-cost reasoning scenarios.

Codex Coding Agent – End-to-End Software Development

Codex is a fully autonomous coding agent that writes, runs, debugs, and ships code across ChatGPT, a dedicated CLI, and a Business Codex plan with pay-as-you-go pricing for development teams. It can operate against real repositories, perform automated code and security review, and handle multi-agent worktrees. Pro users receive expanded Codex usage (5×–20× depending on tier).

Deep Research – Autonomous Cited Reports

A long-running research agent that browses the open web, reads primary sources, and produces cited multi-page reports on any topic. Available on Plus and above with expanded quotas on Pro and Enterprise tiers, it is designed for market analysis, competitive intelligence, and literature review where source credibility matters.

Agent Mode – Real-World Task Automation

Agent Mode hands ChatGPT a virtual browser and computer to complete multi-step real-world tasks autonomously — booking travel, filling government forms, scraping data, monitoring sites, and running chained workflows. Capability expands with each paid tier: limited on Free, expanded on Plus, and maximum on Pro and above. Unlike standard chat replies, Agent Mode acts rather than merely answers.

Use Cases

Everyday Q&A and writing

Draft emails, summarize articles, brainstorm ideas, rephrase tone, translate, and answer general questions on any subject.

Software engineering with Codex

Write new features, debug stack traces, refactor legacy code, generate tests, and run end-to-end coding tasks against real repos. Business Codex offers pay-as-you-go pricing for dev teams.

Data analysis and visualization

Upload CSV/Excel/Google Sheets, ask questions in natural language, generate interactive charts, and export the analysis back out.

Deep research reports

Use Deep Research to investigate a market, competitor, or topic and receive a cited multi-page report with sources.

Pricing plans

Frequently Asked Questions

Discussion

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