“Collectively, they provided incorrect answers to more than 60 percent of queries.”
Columbia Journalism Review, Mar 6, 2025
The facts
ChatGPT deep research at a glance.
From OpenAI's own pages, read Oct 20, 2026. Prices can change at any time; check the maker's page before you pay.
- Made by
- OpenAIBased in United States
- What it is for
- Deep research and AI searchAnswers from the web, with the sources linked.
- Free plan
- YesPricing page lists "Limited deep research" on Free and Go; Plus "Expanded deep research"; Pro "Maximum deep research". Help center: "Deep research usage varies by plan." Exact task counts not published on the pages read.
- Runs on
- web, desktop, mobile
- Website
- chatgpt.com
Plans and prices
| Plan | A month | What it includes |
|---|---|---|
| Free | Free | Pricing page lists "Unlimited text chats with GPT-6", "Limited deep research", "Limited messages with uploads". |
| Go | $8 | Price from OpenAI's learn.chatgpt.com pricing doc; chatgpt.com/pricing did not render prices when read. |
| Plus | $20 | Help center: "ChatGPT Plus is a subscription plan that provides enhanced access to the ChatGPT web app for $20/month." |
| Pro | $100 | "From $100/month"; tiers at $100, $200 or $500 per month (learn.chatgpt.com/docs/pricing). |
| Business | $25 | $20 per user per month billed annually (2+ users); $25 billed monthly. |
OpenAI pricing documentation (learn.chatgpt.com) and ChatGPT pricing page, Oct 20, 2026 · company-reported
Read the small print
What its terms say.
Copied word for word from the maker's terms, with any lawsuits or complaints and their status when we last checked.
“When you use our services for individuals (Free, Plus, Pro), we may use your content to train our models.”
Our note: Quote above is the opening of a longer sentence. Help page notes outputs include citations or source links "so you can verify the information." Data opt-out: see ChatGPT row in assistants.
Independent evidence
What tests of tools like this have found.
“Almost half of all AI answers had at least one significant issue.”
EBU, Oct 21, 2025
Other deep research and ai search tools