ChatGPT offers significantly more advanced fine-tuning and customization capabilities compared to Perplexity AI.
ChatGPT allows users to create custom GPTs—specialized versions of the AI tailored for specific tasks, industries, or interests without requiring coding skills. Users can define custom instructions, knowledge bases, and capabilities such as web browsing or image generation. This customization is accessible via a library of custom GPTs and through a "Customize ChatGPT" feature where users specify how the AI should respond, including tone, length, and style.
In contrast, Perplexity AI’s customization is limited. It does not support custom GPTs or deep fine-tuning. Instead, it offers subscription tiers (e.g., Perplexity Pro) that provide access to more powerful models like GPT-4 and Claude, and the ability to switch between different AI models for different query types. Perplexity focuses on delivering accurate, citation-backed answers by combining GPT models with real-time web search (Retrieval-Augmented Generation, RAG), optimized for research and fact-checking rather than conversational customization.
Summary of Key Differences:
| Feature | ChatGPT | Perplexity AI |
|---|---|---|
| Custom GPTs / Fine-tuning | Yes, users can create and share custom GPTs with tailored instructions and capabilities | No direct equivalent; limited to model switching in subscription tiers |
| Custom Instructions | Yes, users can set instructions for tone, length, style, and response behaviour | No user-level customization of response style or behaviour |
| Model Access | GPT-3.5 (free), GPT-4 and GPT-4o (Plus), plus custom GPTs | GPT-3.5, GPT-4, Claude via subscription; model switching available |
| Real-time Web Search | Limited (Plus mode browsing) | Yes, integrates live web search with citations for up-to-date info |
| Use Case Focus | Conversational AI, creative tasks, writing, brainstorming, and customization | Research-focused, fact-based, citation-backed answers |
| Multimodal Capabilities | Supports image generation, voice conversations, and speech recognition (GPT-4o) | Limited; no voice or image recognition capabilities |
Thus, ChatGPT is better suited for users needing tailored AI interactions and creative flexibility, while Perplexity AI excels in delivering fast, accurate, and transparent research results with live data but lacks deep customization features.
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