Comparison
Best AI for an AI assistant in 2026 (comparison)
For a conversational AI assistant, ChatGPT stays the most versatile, Claude excels at long, nuanced text, Perplexity at sourced answers and Gemini for the Google ecosystem. Our pick: ChatGPT day-to-day, Claude for writing, Perplexity for research.
An AI assistant answers, writes, summarises, translates and reasons — the most universal tool of all. The best depends on your priority: versatility, writing quality, sourced answers or integration with your tools.
Here's our comparison of the best conversational assistants.
Our pick of the best AI for an AI assistant
- 1
ChatGPTTop pickThe all-round AI assistant that started the wave.
Pricing: Free · Plus $20/mo · Pro $100/200Read the review - 2
ClaudeTop pickThe assistant that shines at long-form writing and reasoning.
Pricing: Free · $20/mo (Pro)Read the review - 3
GeminiRecommendedGoogle's AI assistant, woven into your whole ecosystem.
Pricing: Free · AI Pro $19.99/mo · Ultra $99.99/199.99Read the review - 4
PerplexityTop pickThe answer engine that always cites its sources.
Pricing: Free · $20/mo (Pro)Read the review - 5
Microsoft CopilotRecommendedThe AI assistant woven into Microsoft 365 and the web.
Pricing: Free · Copilot Pro $20/mo · M365 Copilot $18-30/userRead the review - 6
Mistral (Le Chat)RecommendedThe French AI assistant: fast and privacy-minded.
Pricing: Free · from $14.99/moRead the review - 7
DeepSeekRecommendedThe low-cost frontier LLM: free chat and a very cheap API.
Pricing: Free chat · usage-based API (from ~$0.14/M tokens)Read the review - 8
GrokRecommendedxAI's conversational assistant, built into X.
Pricing: Free (limited) · SuperGrok $30/moRead the review
Comparison table
| Tool | Pricing | Level | Verdict |
|---|---|---|---|
| ChatGPT | Free · Plus $20/mo · Pro $100/200 | Beginner | Top pick |
| Claude | Free · $20/mo (Pro) | Beginner | Top pick |
| Gemini | Free · AI Pro $19.99/mo · Ultra $99.99/199.99 | Beginner | Recommended |
| Perplexity | Free · $20/mo (Pro) | Beginner | Top pick |
| Microsoft Copilot | Free · Copilot Pro $20/mo · M365 Copilot $18-30/user | Beginner | Recommended |
| Mistral (Le Chat) | Free · from $14.99/mo | Beginner | Recommended |
| DeepSeek | Free chat · usage-based API (from ~$0.14/M tokens) | Pro | Recommended |
| Grok | Free (limited) · SuperGrok $30/mo | Beginner | Recommended |
How to choose an AI for an AI assistant?
- General versatility: ChatGPT covers the most needs.
- Long, nuanced writing: Claude has a slight edge.
- Sourced, verifiable answers: Perplexity cites its sources.
- Office integration: Microsoft Copilot and Gemini within their suites.
Frequently asked questions
- What's the best free AI chatbot?
- ChatGPT, Claude, Gemini and Perplexity all offer a solid free tier; the choice depends on your main use.
- ChatGPT or Claude: which to choose?
- ChatGPT for versatility and ecosystem, Claude for writing finesse and long documents.
- Which AI cites its sources?
- Perplexity is built to answer with clickable, verifiable sources, ideal for research.