Just two years ago, AI assistants were considered toys for tech enthusiasts. Today, according to McKinsey, 78% of Fortune 500 companies use at least one AI tool in daily operations. The landscape has changed so rapidly that even experts struggle to keep up.
Five leading AI assistants dominate the market — each with a distinct focus.
ChatGPT / GPT-5 (OpenAI) remains the market leader with the broadest feature set. GPT-5 delivers strong multimodal reasoning across text, image, audio, and video. The integrated Code Interpreter makes data analysis accessible to everyone. Ideal for all-round tasks from text creation to complex analysis.
Claude Opus 4.6 (Anthropic) sets new benchmarks in coding, safety, and long context. With up to 200,000 tokens of context, Claude analyzes entire codebases or 300-page contracts in a single pass. Ideal for deep analyses, code reviews, and demanding documents.
Gemini 3.1 (Google) is deeply integrated into Google Workspace — Gmail, Docs, Sheets, Slides, Meet. Its multimodal strength combined with native search integration makes it a productivity engine. Ideal for teams already using Google Workspace.
Microsoft Copilot permeates the entire Microsoft 365 ecosystem — Word, Excel, PowerPoint, Teams, Outlook. Under the hood, GPT models work enriched with internal data via Microsoft Graph. Ideal if you already work within the Microsoft ecosystem.
Perplexity Pro has revolutionized AI search. Every answer comes with verifiable source citations and real-time web access. Ideal for research, fact-checking, and current information.
📖 Definition: An AI assistant is software based on Large Language Models (LLMs) that understands natural language inputs, processes them, and transforms them into useful outputs — from text to code to images.
In 2026, two categories have exploded that were barely viable a year ago:
Video generation has made the leap from demo to production. Seedance 2.0 delivers photorealistic videos with precise motion control and camera guidance. Sora 2 (OpenAI) generates up to 60 seconds of coherent video from text descriptions. Marketing teams already use these tools for social media content and product videos.
Open-source models have drastically closed the gap with proprietary models. Llama 4 (Meta) is the open-source leader with impressive text and code performance. Mistral Large 3 comes from Europe, offers strong open-weight models, and is especially attractive for companies prioritizing EU AI Act compliance.
💡 Tip: You can run open-source models on your own infrastructure — solving many data privacy concerns at once.
| Tool | Strength | Weakness | Price (Pro/Month) |
|---|---|---|---|
| 🤖 GPT-5 | Multimodal reasoning, plugins | Privacy (free tier) | ~$20 |
| 🧠 Claude Opus 4.6 | Coding, safety, long context | Smaller plugin ecosystem | ~$20 |
| 🔍 Gemini 3.1 | Workspace integration, search | Limited outside Google | ~$20 |
| 💼 Microsoft Copilot | M365 integration | M365 + Copilot license needed | ~$30 |
| 🌐 Perplexity Pro | AI search with sources | Less creative generation | ~$20 |
| 🎬 Seedance 2.0 | Photorealistic videos | Compute-intensive, expensive | ~$30 |
| 🎥 Sora 2 | Video from text, coherent | Wait times, credits system | ~$20 |
| 🦙 Llama 4 | Open source, self-hostable | Own infrastructure needed | Free |
| 🇪🇺 Mistral Large 3 | EU-compliant, open weight | Smaller community | Free / API |
Before adopting a tool, check five criteria:
⚠️ Caution: Avoid the "tool zoo effect." Every additional tool increases complexity. Three focused tools beat ten half-used ones.
🏢 Real-world example: A mid-sized consulting firm evaluated all five big players. Result: Claude Opus 4.6 as the main tool for analysis and documentation, Perplexity Pro for research, Microsoft Copilot for Office tasks. Three tools — 100% of use cases covered.
🎯 Exercise: List the three most common AI tasks in your team. Assign the best-fitting tool from this overview to each task type — and explain your reasoning.
Next lesson: The Right Tool for the Right Task — Your Decision Framework
Welches AI-Tool ist speziell für die Recherche mit verifizierbaren Quellenangaben bekannt?