Side-by-side comparison · Research & Search

ChatGPT Deep Research vs Kagi

Everything that matters when choosing between them, in one place: our rating, what each can do, what they cost, and the trade-offs.

ChatGPT Deep Research

3.8

From $8/mo

Details Visit

Best overall

Kagi

4.3

From $5/mo

Details Visit

Comparing 2 tools. Add one more if you like.

At a glance

ChatGPT Deep Research3.8

Pick it if: ChatGPT users who want a proper write-up on a question and are happy to wait a few minutes for it.

Kagi4.3

Best overallEasiest to use

Pick it if: People who search all day for work and are tired of ads and spammy results.

Overview

Attribute	ChatGPT Deep Research	Kagi
In one line	ChatGPT's research mode, which browses for you and writes up a cited report.	A paid search engine with no ads or tracking, plus an AI assistant that cites sources.
Pricing model	Freemium	Paid
Starting price	$8/mo	$5/mo
Free plan	Yes	No
Works with Claude Code	No	Yes

Rating breakdown

Our scores out of 5. The higher bar in each row is highlighted.

Attribute	ChatGPT Deep Research	Kagi
Overall rating	3.8	4.3Winner
Ease of useHow quickly someone non-technical gets value from it.	4.0	4.5
FeaturesHow completely it covers its own job, and how well the pieces fit together.	4.0	4.5
Output qualityHow good the results are before you fix them.	4.5	4.5
Value for moneyWhat you get for the price, including the free plan.	3.5	3.5
Speed & reliabilityHow fast it is and how often it falls over.	3.0	4.5

Feature comparison

A tick means it does this today. A dash means we haven't checked.

Attribute	ChatGPT Deep Research	Kagi
Access & platform
Free plan	Yes	No
Mobile app	Yes	Yes
Desktop app	Yes	No
Browser extension	Yes	Yes
API access	Yes	Yes
Teams & business
Team workspace	Yes	Yes
Enterprise plan or SSO	Yes	No
Connects to other apps	Yes	Yes
Open source or self-hosted	No	No
AI abilities
Works with your files	Yes	Yes
Understands images	Yes	Yes
Makes images	Yes	No
Makes video	Yes	No
Writes code	Yes	Yes
Runs agents or automations	Yes	No
Learns your brand or style	Yes	–
Works in many languages	Yes	Yes
Capabilities score	16/ 17	9/ 17

Pricing

Plans as listed on each vendor's site when we last checked. Confirm before you buy.

Attribute	ChatGPT Deep Research	Kagi
Plans	Free Free Seeing what a report looks like.	Trial Free Seeing the difference.
	Go $8/mo Casual users who want more chat, not more research.	Starter $5/mo Light searchers.
	PlusOur pick $20/mo Anyone who wants deep research weekly.	ProfessionalOur pick $10/mo Anyone who searches every day.
	Pro From $100/mo Heavy users who run research daily.	Ultimate $25/mo Heavy AI users.
		Duo and Family Duo $14/mo, Family $20/mo Couples and households.
Which plan to pick	If you have Plus already, you are set; its deep research allowance covers most people. Do not buy ChatGPT just for research unless you also want the rest of it, because Perplexity Pro costs less and is faster. Pro is only worth it if you run reports every day.	Use the free trial for a week, then take Professional. 300 searches on Starter goes in a couple of weeks for most people. Only pay for Ultimate if you'd otherwise pay for an AI chat subscription, since it bundles the top models. Yearly billing saves 10%.

Key features

Attribute	ChatGPT Deep Research	Kagi
Standout features	Clarifying questions Long, cited reports Runs in the background Your own files and apps Visual output Agent mode	Ad-free results Personalised ranking Lenses Kagi Assistant Summaries API and MCP

Pros and cons

Attribute	ChatGPT Deep Research	Kagi
Pros	Clarifying questions up front mean fewer wasted runs Among the most complete and well-structured reports of the three Runs in the background and notifies you when done Can bring your own files and connected apps into the research Exports to PDF with charts and tables	No ads, sponsored results or tracking You control which sites show up and where AI assistant with a choice of top models Fair pricing: unused months are credited back
Cons	Slowest of the three; 10 to 30 minutes is normal Free and Go allowances are tiny and described only as limited Reports run long and occasionally cite weak sources Pro usage allowances have been cut for new subscribers	It costs money, and Starter's 300 searches run out fast Top AI models only on the $25 Ultimate plan Local results like maps and shops are weaker than Google's API and MCP use is billed separately from the search plans

Who each one is for

Attribute	ChatGPT Deep Research	Kagi
Best for	Market and industry scans Comparing products or suppliers Background briefs on a new topic Reading lots of sources at once	Everyday search without ads or tracking Research where you want trustworthy sources Hiding spammy or low-quality sites for good Trying several AI models in one assistant
You'll find it used by	ChatGPT subscribers Marketers Founders Analysts	Researchers Developers Writers Privacy-minded professionals

Questions people ask

Which is better, ChatGPT Deep Research or Kagi?

Kagi scores highest overall in our ratings (ChatGPT Deep Research 3.8/5 and Kagi 4.3/5). ChatGPT Deep Research is best for market and industry scans and comparing products or suppliers. Kagi is best for everyday search without ads or tracking and research where you want trustworthy sources.

Which is cheaper, ChatGPT Deep Research or Kagi?

ChatGPT Deep Research: There's a free plan, and paid plans start at $8/mo. Kagi: There's no free plan. Paid plans start at $5/mo.

Which is easier to use, ChatGPT Deep Research or Kagi?

Kagi rates highest for ease of use in our scores. People who search all day for work and are tired of ads and spammy results.

Ratings are our own, from using each tool, across ease of use, features, output quality, value for money, speed & reliability.

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