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Feature comparison of selected websites
	OpenRouter One API for every LLM.	Groq The fastest LLM inference, free to start.	Together AI Fast, affordable open-model inference.
Rating	—	—	—
Pricing	Freemium	Freemium	Paid
Open source
Category	LLM APIs	LLM APIs	LLM APIs
Key features	One key for 300+ models OpenAI-compatible endpoint Free models and price routing	Sub-second token streaming OpenAI-compatible API Generous free tier	200+ open models Fine-tuning and dedicated endpoints OpenAI-compatible API
Pros	Swap models without changing code Free tier covers real prototyping	Astonishingly fast responses Free tier is genuinely usable	Cheap tokens at scale Strong model selection
Cons	Adds a small routing margin Free models are rate-limited	Open models only Rate limits on the free tier	No always-free tier (credits) Less known than the majors
	Visit openrouter.ai	Visit groq.com	Visit together.ai

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