Stock analysis with AI: The best tools compared for 2025 (including tips & examples)

Nico Dudli
Aug 7
3 min read

Want to invest—but not blindly? A well-founded AI stock analysis can help you do just that: Whether it's SWOT analysis, Tesla valuation, or market sentiment—tools like ChatGPT , Claude , Perplexity , or Gemini take a lot of the research work off your hands.

I tested the tools using typical investor questions – with real-life prompts, practical examples, and concrete recommendations. This way, you can find the right tool for your investment strategy.

What investors specifically want to know

I tested these searches – because they constantly appear in practice:

SWOT analyzes (e.g. Nvidia, Nestlé)
Classify valuation (“Is Tesla currently overvalued?”)
Identify market opportunities (e.g., consumer goods industry reaction to ECB interest rate decision)
Understanding quarterly figures (e.g. Nestlé Q1 2025)

Illustration of a man analyzing stock prices on a laptop, surrounded by AI icons (Claude, ChatGPT, Perplexity, Gemini, and Grok). Charts, price histories, and an AI chat window are visible in the background. — Mit KI smarter investieren: Tools wie ChatGPT, Claude, Perplexity & Co. helfen dir bei Analyse, Bewertung und Strategie.

Which tools are suitable for AI stock analysis?

Claude Opus 4 – For strategic decisions & in-depth analysis

Prompt example: “What opportunities does the trend toward sustainable nutrition offer for Nestlé?”

Why use it?

If you're planning for the long term or delving deeply into business reports, Claude is a powerful companion. You can upload entire reports, and Claude will filter them to the relevant opportunities, risks, and key figures.

Strengthen:

Very in-depth analyses (including ESG & geopolitical contexts)
Huge context area (up to 200K tokens)
Real-time research possible

Weaken:

Not free (use via Poe or API)

Perplexity.ai – For fast research with sources

Prompt example: “How did food stocks perform after the last ECB interest rate decision?”

Why use it?

Perplexity is like a daily news scanner with fact-checking. You ask a question – and immediately get linked sources, reactions, and articles.

Strengthen:

Very current
Sources are disclosed
Ideal for quick assessments

Weaken:

Quality of sources varies (including forum posts)

ChatGPT (GPT-4o) – For explanations & strategic thinking

Prompt example: “What does a P/E ratio of 70 mean – and what does it say about the valuation?”

Why use it?

ChatGPT is your sparring partner for valuation questions or to understand complex relationships – from P/E ratios to balance sheet structure.

Strengthen:

Very good explanations
Ideal for getting started and structuring
Good for strategic considerations

Weaken:

No live data without Pro version
Sources only sometimes given

Screenshot from ChatGPT with an explanation of the price-to-earnings ratio (P/E), including a formula and example calculation for a valuation of Tesla. — **Finanzkennzahlen einfach erklärt:** ChatGPT zeigt, was ein KGV von 70 bedeutet – mit Formel, Beispiel und Bewertung.

Gemini Advanced (Google) – For quick trend checks on the go

Prompt example: “How will the market for plant-based foods develop in Europe in 2025?”

Why use it?

Gemini delivers quick, concise answers based on Google data. Ideal when you're on the go or need a quick overview.

Strengthen:

Mobile & fast
Clearly understandable
Good trend detection

Weaken:

Sources usually not directly visible
Less depth than Claude or ChatGPT

Screenshot from Gemini with an analysis of the growth of the plant-based food market in Europe until 2025 – including sales volume and market size. — **Marktanalyse in Sekundenschnelle:** Gemini liefert kompakte Trends und Prognosen zum europäischen Markt für pflanzenbasierte Lebensmittel 2025.

Grok (xAI) – For moods and social media mood images

Prompt example: “What are traders on X currently saying about Tesla?”

Why use it?

Grok reads what's being discussed on X (formerly Twitter). It's good for getting a first impression of market trends, rumors, or sentiment.

Strengthen:

Extremely current
Focus on market sentiment

Weaken:

No fact checking
No in-depth analyses

Screenshot from Grok with an analysis of current trader opinions on Tesla on X, including optimistic assessments of robotaxis and Elon Musk. — **Was sagen Trader auf X zu Tesla?** Grok fasst bullische Einschätzungen und Social-Media-Stimmungen in Echtzeit zusammen.

Which tool for which type of user?

type	Recommended tool	Why?
Long-term investors	Claude Opus 4	Strategic, deep, ESG-capable
Active traders	Perplexity + Grok	News & sentiment in real time
Beginners & Learners	ChatGPT (GPT-4o)	Explains well, thinks along, helps with structuring
Mobile users	Gemini Advanced	Fast, easy, mobile
Bloggers & Researchers	Claude + Perplexity	Depth + source checking can be combined

How to use the tools effectively in interaction

Step	Tool	Goal
Understanding the topic	ChatGPT or Claude	SWOT, basics, definition
Check news & data	Perplexity	Facts and current figures
Gather market sentiment	Grok	Social media trends & opinions
Check trends on the go	Gemini	Compact overview mobile

What you should know about accuracy

Claude and Perplexity provide reliable sources
ChatGPT is strong in argumentation – but only with Plus version currently
Gemini provides good insights, but little depth
Grok is purely for moods – not for facts

👉 Important: A good AI stock analysis is not a substitute for your mind – but it brings structure, pace and better decisions to your investment strategy.

About the author

Nico Dudli is a lecturer in business informatics and founder of TechNovice.net. He focuses on artificial intelligence, cybersecurity, and digital trends – with the goal of making technology understandable and accessible in a practical way.