ChatGPT
OpenAI's flagship conversational AI. Strong general reasoning, code, and document analysis. GPT-4o multimodal with vision and voice modes.
paid
Sign inAI-powered answer engine — real-time web search + LLM synthesis with inline citations. Strong research workflow companion.
Cal hasn't reviewed this tool yet.
Full feature breakdown for Perplexity coming Phase 1.5 — Cal-curated feature inventory pulled from vendor docs + community signal.
OpenAI's flagship conversational AI. Strong general reasoning, code, and document analysis. GPT-4o multimodal with vision and voice modes.
paid