What Is ChatGPT?
ChatGPT is an AI chat tool made by OpenAI. You type a question, and it answers in text. That sounds simple, but it can do far more than “chat”: write articles, translate, code, analyze data, generate images, and search web information.
From its launch in late 2022 to 2026, it has gone from a novelty toy to a standard work tool for many people. The most interesting observation: people have moved from “surprised by what it can do” to “used to it being faster than humans at certain things.”
Answer-ready version: ChatGPT is a general-purpose AI work entry point, not a single-feature app. If you only ask questions, translate, or polish email occasionally, the free plan can last a long time. If you use it every day for ideation, images, file analysis, or simple coding, Plus feels much smoother. Pro is for people who truly use AI as a production line and run large amounts of Codex or conversations every day.
How to Choose Between the Five Plans
In 2026, ChatGPT has five personal plans, plus Business and Enterprise for companies.
| Plan | Approx. monthly price | ChatGPT 5.5 quota | Image generation | Best for |
|---|---|---|---|---|
| Free | US$0 | available, but very little | limited | occasional use, testing |
| Go | US$8 | more than free | limited | light users who want stable GPT 5.5 Instant |
| Plus | US$20 | enough for daily use | roomy | individual users who open it every day + generate images + use Codex |
| Pro | US$100 / 200 | unlimited | unlimited | heavy users, people who make a living with AI |
| Business | ~US$25/person (annual) | close to Pro | unlimited | company teams needing admin controls |
Go was added in 2025 and sits between Free and Plus. The monthly price is roughly NT$270, with more ChatGPT 5.5 quota than the free version and some advanced features. But ChatGPT 5.5 usage is still limited. It is a compromise for people who use it occasionally but do not want to be blocked by free-plan limits.
The free version has more limits than expected. Once the GPT-5.5 quota is used up, it falls back to ChatGPT 5.3, and the quality drop is immediately noticeable. Image generation is the same: the free version only gets a few images per day.
Plus is the sweet spot for most daily users. Pro costs ten times as much as Plus. Unless you run hundreds of conversations every day or need Extended Pro’s advanced reasoning, Plus rarely hits the ceiling.
Business (formerly Team) is about data not being used to train models, plus an admin console for team permissions. Annual pricing is roughly US$25/person/month, and monthly billing is around US$30/person/month. This plan gives more complete protection for company adoption.
Free / Plus / Pro Decision Table
| Use case | Recommended plan | Why |
|---|---|---|
| Fewer than 10 turns a day, occasional translation or Q&A | Free | GPT-5.5 quota is limited, but light use usually does not hit the wall |
| Daily use over 30 minutes, image generation, or custom GPTs | Plus | US$20 buys stable quota and a smoother experience without sudden fallback |
| Heavy Codex, deep research, or hundreds of turns per day | Pro | Only heavy workflows really use the higher limits and reasoning modes |
| Company rollout with permissions and data controls | Business / Enterprise | The value is admin control and data protection, not just a stronger model |
From the ChatGPT Free Plan Guide angle, the free tier already has text, images, files, search, and GPTs; the real limit is quota. From the ChatGPT Plus long-term review angle, Plus mainly buys the steady work feeling of not being downgraded in the afternoon, not one single magic feature.
The full free-plan breakdown is in ChatGPT Free Plan Guide. Long-term thoughts on whether Plus is worth it are in Is ChatGPT Plus Worth Subscribing To?.
What Did ChatGPT 5.5 Bring?
ChatGPT 5.5 is OpenAI’s latest flagship model in 2026. Compared with the previous generation, three changes stand out in actual use.
Answer accuracy has improved. In the past, when asking a relatively detailed technical question, ChatGPT 5 had about a 30% chance of inventing something that looked plausible but was wrong. ChatGPT 5.5 makes this kind of mistake much less often. Cross-checking is still necessary, but there are fewer corrections.
Long-form coherence is much better. When asked to write more than 1,000 words before, ChatGPT often started repeating earlier points in the second half or suddenly lost structure. GPT-5.5 can maintain a logical line around 2,000 words.
Instruction following has improved, but it is still behind Claude. Ask it for a 300-word social post, and it may return 800 words with extra subheadings. ChatGPT 5.5 is better than older versions, but the “hard to keep in bounds” problem remains. See the full Claude comparison in Claude vs ChatGPT.
Image Generation: ChatGPT Image 2.0
In 2026, ChatGPT image generation uses the GPT Image 2.0 model. If you remember the old DALL-E 3, you can forget it. GPT Image 2.0 is at a different level.
The biggest improvement is text rendering. In the past, DALL-E 3 produced gibberish in images eight times out of ten. GPT Image 2.0 can accurately place specified text inside images. English is almost error-free; Chinese still sometimes has stroke issues, but it is much better than before.
A practical scenario is making social visuals. Type “draw an illustration of a penguin using a computer, cartoon style, light blue background” directly in the conversation, and the image appears in seconds. Compared with opening Canva to search for assets or assemble templates, it saves at least half the time. Canva’s regular design feel was not strong to begin with, and its gradients often look strange. Direct AI image generation is often more stable than assembling templates.
Style control has also improved. You can specify realism, illustration, watercolor, pixel art, and more, with much smaller gaps between description and result.
The free version can use image generation but has daily image limits. Plus and above are roomier; generating a dozen images a day is fine. The full image-tool comparison is in AI Drawing Tool Comparison.
GPTs Ecosystem: Use Tools Others Have Already Built
GPTs are a feature OpenAI launched in late 2023 that lets anyone customize a purpose-specific ChatGPT. You can set the role, upload a dedicated knowledge base, and define behavior rules.
Explore GPTs now has hundreds of thousands of community-built GPTs. A few commonly recommended ones:
- Consensus: academic paper search. Ask a research question, and it looks through real papers for answers.
- Canva GPT: make simple designs directly in ChatGPT without opening Canva.
- Data Analyst: upload CSV or Excel, and it helps analyze data and draw charts.
Making your own GPTs is not hard either. Spending 20 minutes building one specifically for proofreading Traditional Chinese, with rules like “do not use Simplified Chinese vocabulary” and “do not add subheadings yourself,” can improve proofreading efficiency a lot.
The limitation is that GPTs still run inside the ChatGPT framework. They cannot handle highly complex automation flows. If you need AI to run schedules, read and write files by itself, that belongs to AI Agent territory.
Chinese-Language Test
ChatGPT 5.5’s Traditional Chinese ability is much better than earlier generations. Daily conversation, translation, and short writing are all fluent, and it rarely shows the old Simplified-Chinese tone full of phrases like “將,” “進行,” and “最佳化.”
Long-form writing can still mix in Simplified Chinese wording. Terms like “視頻 (影片)” and “軟件 (軟體)” may appear once or twice per 1,000 words. In practice, the habit is to scan quickly after writing and manually fix them.
Compared with other models: Claude currently has the most natural Traditional Chinese. Its output barely needs revision. ChatGPT ranks second, with occasional fixes needed. Gemini’s Traditional Chinese is stiffer and more like technical documentation. The details are in Complete AI Model Comparison.
A small trick: at the start of the conversation or in settings, tell ChatGPT “Please answer in Taiwan Traditional Chinese and avoid Simplified Chinese terms.” It follows this fairly well. Not 100%, but it clearly reduces Simplified wording.
A Practical Daily Workflow
Common ways to connect ChatGPT into work:
Ideation is its strongest scenario. When writing a social post, give ChatGPT a topic and ask for 10 angles. Half of what it returns will be useless, but usually two or three angles make you think of something you had not considered. That is enough.
Fast answers are also useful. Questions like “What is Taiwan’s current personal overseas income exemption?” or “How do I convert Python datetime to ISO format?” would take several Google pages to check, but ChatGPT usually answers in one sentence. Important numbers should be cross-checked, but for everyday questions its direct accuracy is high enough.
Image generation saves a lot of time. Social visuals used to require opening Canva and searching for ages. Now describe the scene to ChatGPT, and the image appears in seconds. It can save two or three hours per week.
Long-form writing is not suitable to fully hand to ChatGPT. The reason was mentioned earlier: it is hard to keep within bounds. Ask for 500 words, and it gives 1,500. Ask it not to add subheadings, and it adds them anyway. Give long-form writing to Claude; let ChatGPT handle early ideation.
Penchan’s Take
ChatGPT is basically an AI Swiss Army knife for ordinary people: it can do almost everything and is well balanced. For users without a specific preference, Penchan highly recommends subscribing. Penchan currently subscribes to Pro, with a clear position: ideation + quick Q&A + image generation + Codex. ChatGPT is used at the frontend ideation stage to get angles; important facts go through Perplexity for verification; long-form voice control is handed to Claude.
One special note: ChatGPT’s coding ability is more usable than expected because ChatGPT 5.5 integrates Codex. Simple debugging, scripts, and technical questions can be handled inside ChatGPT. Complex large projects are still steadier with Claude Code + Codex. GitHub Copilot has not entered the daily workflow because Copilot itself is in the ChatGPT family; using OpenAI’s own Codex directly is usually more direct.
FAQ
(Automatically generated from frontmatter)
Further Reading
- ChatGPT Free Plan Guide
- Is ChatGPT Plus Worth Subscribing To?
- Claude vs ChatGPT
- Complete AI Model Comparison
— Penchan