Compare AI tools

	Perplexity S	Sora A	OpenAI Voice / Realtime S	Devin A
Tagline	AI search done right. Cited answers, not chat theater.	OpenAI's video model. Long clips, cinematic quality.	ChatGPT's voice + the Realtime API for developers.	Cognition Labs' autonomous coding engineer.
Category	Research	Video	Voice	Agents
Pricing	Free + $20/mo Pro	Included with ChatGPT Plus/Pro	Voice included with ChatGPT Plus; Realtime API by usage	$500/mo
Best for	Replacing Google for any question where you want a cited answer in seconds.	ChatGPT subscribers experimenting with cinematic shots.	Voice chat users, developers building voice agents on OpenAI.	Engineering teams offloading tickets. Ops/platform work.
Strengths	Sources every claim Fast, current answers Pro Search runs multi-step research Spaces for persistent context	Up to 20-sec clips at 1080p Strong physics + scene composition Storyboard feature for longer narratives Remix existing videos	Advanced Voice Mode feels genuinely conversational Realtime API enables true two-way voice apps Built into ChatGPT	Works like an engineer — takes Slack tasks, opens PRs Handles multi-hour engineering work Reports back with what it did
Weaknesses	Not a general chatbot Answers can be shallow on complex topics	Stricter content policy than competitors Hit-or-miss on complex motion Text-in-video still struggles	Pricey for production apps Less voice variety than ElevenLabs Platform lock-in	Expensive Best for well-scoped tasks Not for solo hobbyists
Kai's verdict	S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.	A-tier. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros.	S-tier for conversation. A-tier for TTS. Complement to ElevenLabs, not replacement.	A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.
Link	Open →	Open →	Open →	Open →