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.

Comparatif

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
ChatGPTFavorit
Der vielseitige KI-Assistent, der die Welle ausgelöst hat.
Preis: Free · Plus $20/mo · Pro $100/200Voir la fiche
2
ClaudeFavorit
Der Assistent, der bei langen Texten und beim Denken glänzt.
Preis: Free · $20/mo (Pro)Voir la fiche
3
GeminiEmpfohlen
Googles KI-Assistent, in dein gesamtes Ökosystem eingewoben.
Preis: Free · AI Pro $19.99/mo · Ultra $99.99/199.99Voir la fiche
4
PerplexityFavorit
Die Antwortmaschine, die immer ihre Quellen nennt.
Preis: Free · $20/mo (Pro)Voir la fiche
5
Microsoft CopilotEmpfohlen
Der KI-Assistent, eingewoben in Microsoft 365 und das Web.
Preis: Free · Copilot Pro $20/mo · M365 Copilot $18-30/userVoir la fiche
6
Mistral (Le Chat)Empfohlen
Der französische KI-Assistent: schnell und datenschutzbewusst.
Preis: Free · from $14.99/moVoir la fiche
7
DeepSeekEmpfohlen
Das kostengünstige Spitzen-LLM: kostenloser Chat und eine sehr günstige API.
Preis: Free chat · usage-based API (from ~$0.14/M tokens)Voir la fiche
8
GrokEmpfohlen
Der Konversationsassistent von xAI, integriert in X.
Preis: Free (limited) · SuperGrok $30/moVoir la fiche

Comparison table

Outil	Preis	Niveau	Fazit
ChatGPT	Free · Plus $20/mo · Pro $100/200	Einsteiger	Favorit
Claude	Free · $20/mo (Pro)	Einsteiger	Favorit
Gemini	Free · AI Pro $19.99/mo · Ultra $99.99/199.99	Einsteiger	Empfohlen
Perplexity	Free · $20/mo (Pro)	Einsteiger	Favorit
Microsoft Copilot	Free · Copilot Pro $20/mo · M365 Copilot $18-30/user	Einsteiger	Empfohlen
Mistral (Le Chat)	Free · from $14.99/mo	Einsteiger	Empfohlen
DeepSeek	Free chat · usage-based API (from ~$0.14/M tokens)	Profi	Empfohlen
Grok	Free (limited) · SuperGrok $30/mo	Einsteiger	Empfohlen

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.

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