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Side-by-side: what they do, what they cost, what Kai actually thinks. Pass up to 4 tools via ?tools=claude,chatgpt,gemini.
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S
Gemini
A
Pika
A
OpenRouter
S
TaglineRun any open-source AI model with an API call.Google's answer. Best integrated with Workspace + free for a lot.The playful, accessible AI video tool.One API, every model. Pay-as-you-go, no subscriptions.
CategoryDev PlatformChatbotsVideoDev Platform
PricingPay per second of computeFree + $20/mo Advanced (bundled with 2TB Drive)Free + $8-$58/moPay per token — model-dependent
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Anyone already on Google, research tasks, summarizing long documents.Social media creators, beginners, anyone wanting quick fun clips.Developers experimenting across models. Apps that want fallback logic.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Native Google Workspace integration
  • Very long context (1M+)
  • Deep Research feature
  • Free tier is generous
  • Ingredients feature — combine people, objects, scenes
  • Lip sync + sound effects
  • Fun, approachable UX
  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Writing quality trails Claude
  • Over-refusals on edge content
  • UI is cluttered
  • Lower fidelity than Runway/Kling
  • Still rough on complex scenes
  • Slight markup over direct API
  • Some provider features not exposed
Kai's verdictS-tier for open-source model APIs. The default in this space.A-tier. The Deep Research feature is genuinely useful. Don't sleep on it if you're already paying Google.A-tier for social/casual. B-tier for serious work. Good entry point.S-tier for model-shopping. I use this for every prototype before committing.
LinkOpen →Open →Open →Open →