Side-by-side comparison · AI Assistants & LLMs
ChatGPT vs Duck.ai vs Kimi
Everything that matters when choosing between them, in one place: our rating, what each can do, what they cost, and the trade-offs.
Comparing 3 tools, the maximum.
At a glance
Pick it if: Anyone who wants one general-purpose assistant that handles most everyday jobs.
Pick it if: Anyone who wants quick AI help without an account or a record of what they asked.
Pick it if: People who want an agent to produce finished slides, documents, spreadsheets and websites, and developers after a cheaper coding model.
ChatGPT scores highest overall, but Duck.ai gives you more for your money. Which one is right comes down to what you value most.
Overview
| Attribute | ChatGPT | Duck.ai | Kimi |
|---|---|---|---|
| In one line | OpenAI's all-rounder: chat, images, voice, web search and agents in one app. | DuckDuckGo's private AI chat: no account, no stored prompts, free to use. | Moonshot AI's assistant with a strong agent for slides, documents, sheets and websites. |
| Pricing model | Freemium | Freemium | Freemium |
| Starting price | $8/mo | $9.99/mo or $99.99/yr | $19/mo or $15/mo |
| Free plan | Yes | Yes | Yes |
| Works with Claude Code | No | No | No |
Rating breakdown
Our scores out of 5. The higher bar in each row is highlighted.
| Attribute | ChatGPT | Duck.ai | Kimi |
|---|---|---|---|
| Overall rating | 4.3Winner | 4.0 | 3.8 |
| Ease of useHow quickly someone non-technical gets value from it. | 4.5 | 4.5 | 4.0 |
| FeaturesHow completely it covers its own job, and how well the pieces fit together. | 5.0 | 3.0 | 4.5 |
| Output qualityHow good the results are before you fix them. | 4.0 | 3.5 | 4.0 |
| Value for moneyWhat you get for the price, including the free plan. | 4.0 | 4.5 | 3.5 |
| Speed & reliabilityHow fast it is and how often it falls over. | 4.0 | 4.5 | 3.0 |
Feature comparison
A tick means it does this today. A dash means we haven't checked.
| Attribute | ChatGPT | Duck.ai | Kimi |
|---|---|---|---|
| Access & platform | |||
| Free plan | Yes | Yes | Yes |
| Mobile app | Yes | Yes | Yes |
| Desktop app | Yes | Yes | Yes |
| Browser extension | Yes | Yes | No |
| API access | Yes | No | Yes |
| Teams & business | |||
| Team workspace | Yes | No | – |
| Enterprise plan or SSO | Yes | No | No |
| Connects to other apps | Yes | No | No |
| Open source or self-hosted | No | No | Yes |
| AI abilities | |||
| Works with your files | Yes | Yes | Yes |
| Understands images | Yes | Yes | Yes |
| Makes images | Yes | Yes | – |
| Makes video | No | No | No |
| Writes code | Yes | Yes | Yes |
| Runs agents or automations | Yes | No | Yes |
| Learns your brand or style | Yes | No | No |
| Works in many languages | Yes | Yes | Yes |
| Capabilities score | 15/ 17 | 9/ 17 | 10/ 17 |
Pricing
Plans as listed on each vendor's site when we last checked. Confirm before you buy.
| Attribute | ChatGPT | Duck.ai | Kimi |
|---|---|---|---|
| Plans | Free Free Trying it out and everyday questions. | FreeOur pick Free Quick private questions with no sign-up. | Adagio Free Trying the chat and a taste of the agent. |
Go $8/mo Casual users who hit the free limits. | Plus $9.99/mo or $99.99/yr Regular users who also want a VPN. | PlusOur pick $19/mo or $15/mo billed yearly Anyone who wants to use the agent most weeks. | |
PlusOur pick $20/mo Anyone using it most days for work. | Pro $19.99/mo or $199.99/yr People who want the top models privately. | Pro $39/mo or $31/mo billed yearly Regular users who run out of credits on Plus. | |
Pro From $100/mo Heavy users and people living in Codex. | Max $99/mo or $79/mo billed yearly Heavy users running several jobs at once. | ||
Business See website Teams from 2 people up. | Ultra $199/mo or $159/mo billed yearly Power users running agents all day. | ||
| Which plan to pick | The free plan is now good enough to use properly, so stay on it until the image, voice or research limits annoy you. Plus is the sensible upgrade. Only look at Pro if you run Codex or deep research all day, and read the current tier details first: Pro 200 now comes with a smaller allowance than it did before 29 September. | Stay on Free unless you also want a VPN. Plus is good value if you'd pay for a VPN anyway. Pro is $19.99, the same as ChatGPT Plus or Claude Pro, so only pick it if anonymity matters more to you than features. | Try the free plan to see the agent's output. If you like it, Plus at $19 is the sensible plan, and the yearly price drops it to $15. Only move up if you keep running out of credits, which long Swarm jobs do quickly. |
Key features
| Attribute | ChatGPT | Duck.ai | Kimi |
|---|---|---|---|
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Pros and cons
| Attribute | ChatGPT | Duck.ai | Kimi |
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Who each one is for
| Attribute | ChatGPT | Duck.ai | Kimi |
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Questions people ask
Which is better, ChatGPT, Duck.ai or Kimi?
ChatGPT scores highest overall in our ratings (ChatGPT 4.3/5, Duck.ai 4.0/5 and Kimi 3.8/5). ChatGPT is best for everyday questions and brainstorming and making and editing images in the chat. Duck.ai is best for quick private questions and Using AI without signing up. Kimi is best for turning a brief into a slide deck and research reports and document drafts.
Which is cheaper, ChatGPT, Duck.ai or Kimi?
ChatGPT: There's a free plan, and paid plans start at $8/mo. Duck.ai: There's a free plan, and paid plans start at $9.99/mo or $99.99/yr. Kimi: There's a free plan, and paid plans start at $19/mo or $15/mo.
How we compare
Ratings are our own, from using each tool, across ease of use, features, output quality, value for money, speed & reliability.
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