ChatGPT (GPT-5.5)
OpenAI's frontier general-purpose model with optional web tools.
ChatGPT (GPT-5.5) vs
Perplexity (Sonar Pro)
ChatGPT vs Perplexity
ChatGPT and Perplexity solve different problems. ChatGPT is a frontier general-purpose AI; Perplexity is an answer engine grounded in fresh web sources.
Perplexity (Sonar Pro)
Perplexity's advanced search model with native real-time web grounding and inline citations on every answer.
| ChatGPT (GPT-5.5) | Perplexity (Sonar Pro) | |
|---|---|---|
| Primary use | General-purpose AI | Answer engine with web search |
| Real-time web | Optional, tool-based | Built-in, every response |
| Citations | On request | Inline by default |
| Reasoning | Strongest on hard problems | Strong, plus Sonar Reasoning Pro variant |
| Pricing | OpenAI tiers | $3 input / $15 output per 1M tokens |
Pick ChatGPT (GPT-5.5) when you need general reasoning, coding, agents, computer use — the full LLM toolkit.
Pick Perplexity Sonar Pro when you need fast, cited answers grounded in fresh web data — research, current events, fact-checking.
The verdict
These are complementary, not competitors. Use ChatGPT for general AI work and Perplexity for grounded research with citations.
Frequently Asked Questions
Can ChatGPT browse the web?
ChatGPT (GPT-5.5) can use web search as an optional tool, but it does not ground every answer in web sources by default. Perplexity Sonar Pro grounds every single response in fresh web citations automatically.
Which is better for academic research?
Perplexity Sonar Pro is better for research requiring up-to-date citations. ChatGPT excels at synthesising, writing and analysing research content once you have gathered your sources.