ChatGPT
: How to use it, features, and the business problems it solves
Add bookmark
What is ChatGPT?
ChatGPT is an AI assistant provided by OpenAI, the conversational service at the center of the generative AI boom. Built on the latest GPT-6 Astra and GPT-5.6 family, it runs question answering and writing plus Deep Research, image generation, data analysis, voice conversation, and a coding agent (Codex) in a single app. It is expanding into features that hand off tasks, such as projects, scheduled tasks, custom GPTs, and workspace agents. Pricing is free / Go ¥1,400 / Plus ¥3,000 / Pro ¥16,800– (individual, monthly), with Business and Enterprise for organizations.
Business problems it solves
About "ChatGPT"
What is ChatGPT
ChatGPT is an AI assistant provided by OpenAI, the conversational service at the center of the generative AI boom. Built on the latest GPT-6 Astra and GPT-5.6 family of models, it handles question answering and writing, and also brings Deep Research (automated research), image generation, data analysis, voice conversation, and a coding agent (Codex) together in a single app. It goes beyond mere chat, expanding into features that "hand off tasks," such as project management, scheduled execution, custom GPTs, and workspace agents.
From "conversation" to "task execution"
ChatGPT's current position is not just answering questions but executing tasks such as research, generation, and implementation. Run automated research with Deep Research, hand off coding to Codex, and automate routine processing with scheduled tasks. With custom GPTs, internal tool integrations, and a built-in browser, you can embed it into your business workflows.
How to use it
-
Create an account (free)
Go to chatgpt.com and create an account. You can start using it for free.
-
Ask a question or make a request
Enter what you want to look up or create. Attaching images and files and voice input are also supported.
-
Research and generate
Create reports with Deep Research, or run image generation and data analysis.
-
Hand off tasks
Code with Codex, run things automatically with scheduled tasks, and streamline routine work with custom GPTs.
-
Choose a plan
Depending on your usage and the models you need, upgrade to Go / Plus / Pro (individual) or Business / Enterprise (organizations).
Features
01Conversation and reasoning
Handle a wide range of tasks.
- GPT-6 Astra / GPT-5.6 family models — GPT-6 Astra, released in September 2026 (as "GPT-6 Pro" in Chat on Pro and above; via ChatGPT Work and Codex on Plus), plus GPT-5.6 Sol/Sol Pro/Terra/Luna, used as suited to the task
- Large context — Retains long documents and chats
- Voice and Vision — Voice conversation and image understanding
02Generation and research
Create and research in depth.
- Image generation — High-fidelity image creation (including generation via Thinking)
- Deep Research — Automatically gathers information and turns it into a report
- Data analysis — Analysis and visualization based on files
03Agents and extensions
Hand off tasks and connect to your work.
- Codex — A coding agent
- Projects and scheduled tasks — Ongoing work and automatic execution
- Custom GPTs and app integrations — Purpose-built uses and internal tool connections
Pricing
It is free to use, and higher-tier plans expand your usage, models, and features (amounts shown are monthly prices in Japan, as of September 2026; for individuals).
| Plan | Monthly | What's included |
|---|---|---|
| Free | ¥0 | GPT-5.6 Luna (unlimited everyday chat), with caps on uploads, image generation, voice, and Deep Research |
| Go | ¥1,400 | GPT-5.6 Luna, expanded limits for messages with tools, uploads, images and voice, longer memory |
| Plus | ¥3,000 | GPT-5.6 Sol (Medium / High) reasoning, GPT-6 Astra rolling out in ChatGPT Work and Codex, expanded Deep Research, projects, scheduled tasks, and custom GPTs |
| Pro | ¥16,800 / ¥30,000 | 5x / 20x usage, GPT-6 Pro (GPT-6 Astra) and GPT-5.6 Sol Pro, maximum Codex, unlimited images, maximum Deep Research |
For organizations, Business and Enterprise are available (from 2 users, with annual plans and admin features).
Where each plan can use GPT-6 Astra (Chat vs ChatGPT Work vs Codex, limits, and API pricing) is laid out in What GPT-6 Astra is.
How it differs from other AI assistants
ChatGPT is chosen for "the breadth of its features and ecosystem, and its expansion into task execution." Like Claude and Gemini, it is a high-performance conversational AI, but its strength is the comprehensiveness of its features, including image generation, Codex, custom GPTs, and app integrations.
| ChatGPT | Claude | Gemini | |
|---|---|---|---|
| Provider | OpenAI | Anthropic | |
| Strengths | Breadth of features, agents, ecosystem | Writing, code, analysis, safety | Google service integration, video generation |
| Free tier | Yes (¥0) | Yes ($0) | Yes (¥0) |
If you're choosing based on the quality of writing, code, and analysis, Claude is a comparison point; for integration with Google services, Gemini is worth comparing.
The information on this page is based on what was published on the official website as of September 2026. Please check the official website for the latest specifications and pricing.
Frequently compared services
Articles featuring ChatGPT
What Jev Is [September 2026]: The AI That Generates No Text — How System One Models Work, Pricing and Use Cases
On 15 September 2026, TypeSafe AI came out of two years of stealth with $40M in funding and shipped Jev — and it spread past social media into developer communities, with Qiita running an official campaign from 16 September to 2 October. What caught on was not the benchmarks but the positioning: an AI that does not generate text. Jev does not chat; it picks from options you defined and returns the answer with a probability attached. This article covers what the three question types (Choice, Score, Noul) actually return, the speculative fan-out that makes stacking questions free in latency, the pricing model of $0.042 per million input tokens with output free, the path from waitlist to Python SDK, HTTP API and the Claude Code skill, how to gate on confidence and route the uncertain cases to a person, and where it pays off — support triage, LLM guardrails, RAG re-ranking. It also covers what TypeSafe publishes about its own weak spots: lower accuracy on CJK scripts, unreliable counting, and weak date comparison.
![What Jev Is [September 2026]: The AI That Generates No Text — How System One Models Work, Pricing and Use Cases](/_next/image?url=%2Fimages%2Farticles%2Fjev-typesafe-ai-guide.png&w=3840&q=75 "What Jev Is [September 2026]: The AI That Generates No Text — How System One Models Work, Pricing and Use Cases")
What GPT-6 Astra Is [September 2026]: Which ChatGPT Plans Include It, API Pricing, and How to Split Work with GPT-5.6
GPT-6 Astra, announced by OpenAI on 3 September 2026 (US time), is a flagship tuned for computer use and long, multi-step work, true to the pitch that it "can do anything a person can do on a computer." It scores 72.6% on OSWorld 2.0, and time per task drops 47% from GPT-5.6 Sol's roughly 75 minutes to roughly 40. This article checks what changed against the benchmarks, then lays out where each ChatGPT plan can use it (Pro at ¥16,800 / ¥30,000, Business and Enterprise get "GPT-6 Pro" in Chat; Plus at ¥3,000 gets it through ChatGPT Work and Codex; Free and Go do not), the caps such as 50 or 200 messages a week, API pricing ($10 input / $50 output, 2.5x Sol) and how to split work with Sol, Terra and Luna, and the behaviour changes on switching (more clarifying questions, more sensitivity to skill files), based on OpenAI's announcement, Help Center and model page.
![What GPT-6 Astra Is [September 2026]: Which ChatGPT Plans Include It, API Pricing, and How to Split Work with GPT-5.6](/_next/image?url=%2Fimages%2Farticles%2Fgpt-6-astra-guide.png&w=3840&q=75 "What GPT-6 Astra Is [September 2026]: Which ChatGPT Plans Include It, API Pricing, and How to Split Work with GPT-5.6")
What Is Cloudflare OS? A Deep Dive into the Open-Source AI Agent Workspace (Architecture, Gatekeepers, Self-Hosting, Pricing)
Cloudflare open-sourced Cloudflare OS, an AI agent workspace, on August 5, 2026. This article covers its zero-permission Gatekeeper security, model selection and cost control via AI Gateway, Gadgets (small personal apps), how to deploy it into your own Cloudflare account, and pricing — based on the official blog and GitHub.
Claude Fable 5 vs. GPT-5.5 vs. Gemini 3.1 Pro: Which Should You Choose? A Deep Dive into Performance, Pricing, and Use Cases [July 2026]
A thorough comparison of the latest flagship models from the industry's three leading AI labs, all released in the first half of 2026: Claude Fable 5, GPT-5.5, and Gemini 3.1 Pro. Covers benchmark performance, API pricing, context windows, multimodal support, and how to use them on consumer plans like ChatGPT Plus, Claude Pro, and Google AI Pro — with recommendations by use case, based primarily on official data.
![Claude Fable 5 vs. GPT-5.5 vs. Gemini 3.1 Pro: Which Should You Choose? A Deep Dive into Performance, Pricing, and Use Cases [July 2026]](/_next/image?url=%2Fimages%2Farticles%2Fai-model-compare-claude-fable-5-gpt-5-5-gemini-3-1.png&w=3840&q=75 "Claude Fable 5 vs. GPT-5.5 vs. Gemini 3.1 Pro: Which Should You Choose? A Deep Dive into Performance, Pricing, and Use Cases [July 2026]")
How to Use Sakana AI Fugu: From API Key to Claude Code | Pricing, Free Tier, and Performance
A guide to Sakana AI's multi-agent platform Fugu: issuing an API key at console.sakana.ai, calling the OpenAI-compatible API, and wiring it into Codex and Claude Code. Covers choosing between Fugu, Fugu Ultra, and Fugu Cyber, pricing and whether a free tier exists, and benchmark performance.
[2026 Latest] 16 AI Tools to Maximize Sales Performance | Dramatically Improving Meeting, Proposal, and Call Efficiency
A curated look at the AI tools getting attention in sales today. Covers the latest AI for every workflow challenge — from lead generation and proposal decks to meeting note creation.
![[2026 Latest] 16 AI Tools to Maximize Sales Performance | Dramatically Improving Meeting, Proposal, and Call Efficiency](/_next/image?url=%2Fimages%2Farticles%2Fai-sales-tools-recommendation.png&w=3840&q=75 "[2026 Latest] 16 AI Tools to Maximize Sales Performance | Dramatically Improving Meeting, Proposal, and Call Efficiency")