Compare AI tools

	Lex A	GitHub Copilot B	OpenRouter S	Stable Audio A
Tagline	Google Docs with an AI collaborator baked in.	Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.	One API, every model. Pay-as-you-go, no subscriptions.	Stability AI's open audio model. Loops + SFX + background.
Category	writing	coding	dev platform	audio
Pricing	Free + $12/mo	Free (limited) + $10/mo Pro + $19/mo Business	Pay per token — model-dependent	Free + $12/mo Pro + enterprise
Best for	Essays, long-form drafts, thinking on the page.	Teams with GitHub already. Devs who don't want to change IDEs.	Developers experimenting across models. Apps that want fallback logic.	Game developers, podcasters needing SFX, video creators needing background music.
Strengths	Clean writing UX — distraction-free +++ prompt triggers AI help Collaboration + AI feedback together	Great enterprise story Works in your existing IDE Chat + autocomplete	300+ models from one endpoint Automatic fallbacks between providers No subscription — just pay what you use	Open-weight model available Great for loops + game audio + SFX Commercial-use clarity
Weaknesses	Less feature-rich than Google Docs AI ceiling below dedicated tools	Less agentic than Cursor/Claude Code Model quality varies	Slight markup over direct API Some provider features not exposed	Not for full songs with vocals Shorter generation limits
Kai's verdict	A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.	B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.	S-tier for model-shopping. I use this for every prototype before committing.	A-tier for its niche. Different use case than Suno — SFX and loops, not songs.
Link	Open →	Open →	Open →	Open →