Compare AI tools

	DALL-E 3 B	HeyGen S	NotebookLM S	Devin A
Tagline	OpenAI's image model. Built into ChatGPT Plus.	AI avatar videos. Record once, speak any language.	Google's research notebook. Turns your docs into a podcast.	Cognition Labs' autonomous coding engineer.
Category	Image	Video	Research	Agents
Pricing	Included with ChatGPT Plus $20/mo	Free + $24-$65/mo	Free	$500/mo
Best for	ChatGPT Plus users who want images without paying extra.	Course creators, multilingual marketers, anyone scaling video content.	Students, researchers, anyone with a stack of PDFs or a topic to learn.	Engineering teams offloading tickets. Ops/platform work.
Strengths	Excellent prompt understanding Built into ChatGPT — no extra subscription Good at composition + concepts	Clone your face + voice in 2 minutes Instant translation into 40+ languages with lip sync Avatars look less uncanny than competitors	Upload anything, ask questions, get cited answers Audio Overview turns docs into a 10-min podcast Great for studying	Works like an engineer — takes Slack tasks, opens PRs Handles multi-hour engineering work Reports back with what it did
Weaknesses	Aesthetic ceiling below Midjourney + Ideogram Text rendering worse than Ideogram No fine control	Pricey for serious volume Long shots still feel off Ethics — easy to misuse	Google-only Can be slow on large corpora	Expensive Best for well-scoped tasks Not for solo hobbyists
Kai's verdict	B-tier standalone, A-tier value if you already pay ChatGPT. Don't pay for it separately.	S-tier for multilingual video. If you sell courses or speak at events, this is a cheat code.	S-tier for study. The Audio Overview is a killer feature. Try it with three of your favorite PDFs.	A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.
Link	Open →	Open →	Open →	Open →