Compare AI tools

	Claude Agent SDK S	Cursor S	Suno S	Sora A
Tagline	Anthropic's SDK for building your own agents on Claude.	VS Code fork that made AI coding actually work.	Prompt to full song with vocals, instruments, the works.	OpenAI's video model. Long clips, cinematic quality.
Category	Agents	Coding	Audio	Video
Pricing	API usage + SDK is free	Free + $20/mo Pro + $40/mo Business	Free + $10/mo + $30/mo	Included with ChatGPT Plus/Pro
Best for	Developers building custom agents for their own company/product.	Developers. Non-developers who want to ship working code.	Jingles, intros, demos, sketches, personal use.	ChatGPT subscribers experimenting with cinematic shots.
Strengths	Production-grade agent primitives Built on Claude (best reasoning) Full control — build exactly what you need	Tab completion feels like mind-reading Composer for multi-file edits Runs Claude, GPT, Gemini — you pick	Real songs with real lyrics v4 is very good Quick turnaround	Up to 20-sec clips at 1080p Strong physics + scene composition Storyboard feature for longer narratives Remix existing videos
Weaknesses	Developer-only You build the UI	Can feel overwhelming for non-coders Expensive at scale	Copyright gray zone Audio quality behind studio	Stricter content policy than competitors Hit-or-miss on complex motion Text-in-video still struggles
Kai's verdict	S-tier for builders. The right primitives. What Kai is built on under the hood.	S-tier for coding. If you write code of any kind, this pays back the $20 in a day.	S-tier in its category. The first AI music tool I'd actually listen to.	A-tier. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros.
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