Pick ChatGPT if
everyone who wants a hosted general assistant — writing, Q&A, light research, images.
Read the ChatGPT pageChatGPT vs Dia
Our take
Pick ChatGPT if everyone who wants a hosted general assistant — writing, Q&A, light research, images. Pick Dia if arc / The Browser Company users who want tab-aware chat and will pay for AI. Skip ChatGPT if teams that cannot send prompts to OpenAI, or developers who need a repo-aware IDE (Cursor) or a local runtime (Ollama). Skip Dia if people who want a $0 AI browser (Perplexity Comet) or who refuse a second
Best for
ChatGPT A general-purpose conversation
Dia A browser with tab-aware answers
Free plan
ChatGPT $0 · unlimited everyday text chats (abuse guardrails). Limited uploads, images, voice, deep research, memory, Codex, and desktop Work. Confirmed as the free plan on chatgpt.com/pricing copy and Help
Dia $0 · no AI. Profiles, tab groups, split-view, blocker, sync
Lowest paid
ChatGPT Plus $20/mo, monthly only
Dia Better Answers $10/mo
Next step up
ChatGPT Pro $100 / $200 / $500 per month
Dia Usage top-ups $20
Coding agent
ChatGPT Codex, rate-limited on Free
Dia
Runs where
ChatGPT Local or hosted
Dia
Watch out
ChatGPT chatgpt.com/pricing HTML still hides $
Dia Free has no AI
Last checked
ChatGPT 2026-10-19 · help.openai.com
Dia 2026-10-22 · diabrowser.com
Which one, then?
Pick Dia if
arc / The Browser Company users who want tab-aware chat and will pay for AI.
Read the Dia page