Use cases Call AI models
Apps an AI agent can use to call AI models
Model gateways and hosts give one API across many models for text, images, audio and video. Compare pricing, rate limits and fallback when a provider is down.
4 apps, most reported first
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Perplexity
perplexity.ai
Web-grounded answers with citations, and several model providers through one API.
MCP · SDK · API
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fal
fal.ai
Call over 1,000 AI models for image, video and audio, or deploy your own.
CLI · API · Skill
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Helicone
helicone.ai
Route AI model calls through one API, with observability, cost tracking and session debugging.
SDK · API · Skill
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OpenRouter
openrouter.ai
Call many AI models through one API. Setup installs OpenRouter and checks that it works.
SDK · API