The best AI assistants in 2026
ChatGPT, Claude, Gemini, Copilot and Perplexity compared on free-plan limits, paid tiers and where each one fits best — pricing verified on each vendor's site.
The short answer
ChatGPT is the best all-round AI assistant, with the widest feature set and a cheap $8 Go tier. Claude is the strongest pick for long documents, writing and coding; Gemini is best if you live in Gmail and Google Docs; Perplexity is best when you need cited sources; and Copilot is best inside Microsoft 365. Their main paid tiers each cost about $20 a month.
- The standard paid tier is $20/month for ChatGPT Plus, Claude Pro and Perplexity Pro, and $19.99 for Google AI Pro.
- ChatGPT Go ($8) and Google AI Plus ($4.99) are cheaper entry tiers.
- Copilot's paid features come bundled with Microsoft 365 from $9.99/month.
- Every service caps usage, and only some publish the exact limits.
Our picks
- 1.
ChatGPT
Best all-rounder
ChatGPT covers the most ground in one app: chat, deep research, image creation, voice, memory, projects, scheduled tasks and the Codex coding agent. The free plan gives unlimited text chat on the base model, Go costs $8 a month in the US, and Plus is $20. There's no Linux desktop app.
- Developer
- OpenAI
- First released
- 2022
- Based in
- San Francisco, California, USA
- Platforms
- Windows, macOS, iOS, Android, Web, Browser extension
- Free plan
- YesUnlimited text chat on the free model, with limited uploads, image creation, voice, deep research and memory.
- Open source
- No
- Go $8/mo
- Plus $20/mo
- Pro $100/mo
- Business $25/mo
Checked against chatgpt.com on Oct 6, 2026
Stand-out features
- Deep research
- Image creation and voice conversations
- Memory across chats
- Projects, scheduled tasks and custom GPTs (Plus and up)
Limits to know
- Every plan has message caps
- No Linux desktop app
- Model availability changes frequently
- 2.
Claude
Best for long documents, writing and coding
Claude's free plan already includes web search, file creation, code execution and memory. Pro ($20 a month, or $17 billed annually) adds Claude Code for agentic programming and Anthropic's larger models. It has desktop apps for macOS, Windows and Linux (beta). Usage limits reset on a rolling five-hour window.
- Developer
- Anthropic
- First released
- 2023
- Based in
- San Francisco, California, USA
- Platforms
- Windows, macOS, Linux, iOS, Android, Web, Browser extension
- Free plan
- YesSonnet and Haiku models, up to 5 projects, usage limits on a rolling five-hour window. Includes web search, file creation, code execution and memory.
- Open source
- No
- Pro $20/mo
- Max $100/mo
- Team $25/mo
Checked against claude.com on Oct 6, 2026
Stand-out features
- Claude Code agentic coding (Pro and up)
- Web search, file creation and code execution — on Free too
- Memory across conversations
- Connectors to apps and Artifacts
Limits to know
- Free plan has no access to the largest models
- Usage limits reset on a rolling five-hour window
- Linux desktop app is in beta
- 3.
Google Gemini
Best for Google Workspace users
Gemini works inside Gmail, Docs and other Google apps on paid plans, and Google AI Pro ($19.99 a month) also bundles 5 TB of storage. Google AI Plus is a $4.99 entry tier. Usage limits refresh every five hours up to a weekly cap.
- Developer
- First released
- 2024
- Based in
- Mountain View, California, USA
- Platforms
- Android, iOS, Web, macOS, Windows
- Free plan
- YesFlash model with varying access to Pro, image generation, Deep Research, Gemini Live and Canvas. Limits refresh every 5 hours up to a weekly cap.
- Open source
- No
- Google AI Plus $4.99/mo
- Google AI Pro $19.99/mo
- Google AI Ultra $99.99/mo
Checked against gemini.google on Oct 6, 2026
Stand-out features
- Deep Research and Canvas
- Gemini Live voice conversations
- Image and (paid) video generation
- Gemini inside Gmail, Docs and other Google apps (paid)
Limits to know
- Limits refresh every 5 hours with a weekly cap and may change without notice
- Free tier gets only varying access to the Pro model
- 4.
Perplexity
Best for research with citations
Perplexity answers with inline citations by default, which makes it easy to check claims. Pro ($20 a month) lets you choose between models from several AI labs and adds Deep Research. The free tier is tight — three Pro Searches a day.
- Developer
- Perplexity AI
- Platforms
- Windows, macOS, iOS, Android, Web
- Free plan
- Yes3 Pro Searches per day, 1 Research query per month, basic models.
- Open source
- No
- Pro $20/mo
- Max $200/mo
- Enterprise Pro $40/mo
Checked against perplexity.ai on Oct 6, 2026
Stand-out features
- Answers with inline citations
- Deep Research
- Pick between models from OpenAI, Anthropic, Google and others (Pro)
- Comet AI browser
Limits to know
- Free tier is tight: 3 Pro Searches a day
- Max annual billing only on web
- 5.
Microsoft Copilot
Best for Microsoft 365
The Copilot app is free on every major platform, and Microsoft 365 Personal ($9.99 a month) adds Copilot in Word, Excel, PowerPoint, Outlook and OneNote. Microsoft 365 Premium ($19.99) adds the Researcher and Analyst agents. Microsoft doesn't publish exact usage limits.
- Developer
- Microsoft
- First released
- 2023
- Based in
- Redmond, Washington, USA
- Platforms
- Windows, macOS, iOS, Android, Web
- Free plan
- YesFree Copilot app on every major platform; Microsoft does not publish exact limits.
- Open source
- No
- Microsoft 365 Personal $9.99/mo
- Microsoft 365 Family $12.99/mo
- Microsoft 365 Premium $19.99/mo
Checked against copilot.microsoft.com on Oct 6, 2026
Stand-out features
- Free chat app on Windows, Mac, iOS, Android and web
- Copilot in Word, Excel, PowerPoint, Outlook and OneNote (Microsoft 365)
- Researcher agent for cited, multi-step reports (Premium)
- Analyst agent for data analysis (Premium)
Limits to know
- On Family plans, AI features are for the subscription owner only
- Usage limits exist but aren't published
- No Linux app
Full Microsoft Copilot fact sheet or visit copilot.microsoft.com
Comparison table
| App | Best for | Free plan | Paid from | Platforms | Open source |
|---|---|---|---|---|---|
| ChatGPT | Best all-rounder | Yes | $8/mo | Windows, macOS, iOS, Android, Web | No |
| Claude | Best for long documents, writing and coding | Yes | $20/mo | Windows, macOS, Linux, iOS, Android, Web | No |
| Google Gemini | Best for Google Workspace users | Yes | $4.99/mo | Windows, macOS, iOS, Android, Web | No |
| Perplexity | Best for research with citations | Yes | $20/mo | Windows, macOS, iOS, Android, Web | No |
| Microsoft Copilot | Best for Microsoft 365 | Yes | $9.99/mo | Windows, macOS, iOS, Android, Web | No |
Why “best” depends on where you already work
The big assistants have converged on a similar core — chat, web search, file analysis, voice — so the deciding factor is usually integration:
- Google Workspace households get the most from Gemini.
- Microsoft 365 subscribers already pay for part of Copilot.
- Developers should compare Claude Code and OpenAI’s Codex directly.
- Researchers and students benefit most from Perplexity’s citation-first answers.
A note on model names
Every vendor here renames and replaces models every few months, and paid plans quietly gain new ones. We list plans and prices, which change less often, and link to each vendor’s pricing page for the current model line-up.
Disclosure
Hybridhand used several of these assistants to help research and format this guide. Every price and limit above was verified on the vendor’s own pages; no vendor paid for placement.
Frequently asked questions
Which AI assistant is best for free?
ChatGPT's free plan offers unlimited text chat on its base model. Claude's free plan includes web search, file creation and code execution. Gemini's free tier includes Deep Research and image generation. All three cap heavier features.
How much does ChatGPT Plus cost compared with Claude Pro?
Both are $20 a month billed monthly. Claude Pro drops to $17 a month with annual billing; ChatGPT also has an $8 Go tier in the US.
Which AI assistant cites its sources?
Perplexity shows inline citations by default. The others can search the web and cite sources, but Perplexity is built around it.
Is Copilot free?
The Copilot app is free. Copilot inside Word, Excel and other Office apps requires a Microsoft 365 Personal, Family or Premium subscription.
Sources & methodology
Every price, plan limit and platform on this page comes from the vendor's own pricing, download, security or help pages, checked on the date shown next to each app. We don't publish benchmark scores we haven't measured. Read the full methodology.
- OpenAI — introducing ChatGPT Go
- Google — Gemini subscriptions
- ChatGPT: chatgpt.com/pricing/
- ChatGPT: help.openai.com/en/articles/6950777-what-is-chatgpt-plus
- Claude: claude.com/pricing
- Claude: claude.com/download
- Google Gemini: gemini.google/subscriptions/
- Google Gemini: gemini.google/release-notes/
- Perplexity: perplexity.ai/enterprise/pricing
- Perplexity: perplexity.ai/help-center/en/articles/11187416-which-perplexity-subscription-plan-is-right-for-you
- Microsoft Copilot: microsoft.com/en-us/microsoft-copilot/for-individuals/get-copilot
- Microsoft Copilot: microsoft.com/en-us/microsoft-365/buy/compare-all-microsoft-365-products
Update history
- : First published. Plan prices verified on vendor pricing and help pages.
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