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LLM APIs & Model Routing

3 tools, ordered by overall editorial score. Use-case pages use a separate fit order.

  1. 01

    Gemini API (Google AI Studio)

    Google's Gemini models via API with a free prototyping tier in AI Studio

    FreemiumFree tier · pay per token

    7/10

  2. 02

    OpenAI API

    Direct API access to OpenAI's GPT models for building AI features

    PaidPay per token (e.g. GPT-6 Luna $0.10 in / $0.50 out per 1M)

    7/10

  3. 03

    OpenRouter

    One API key to call hundreds of LLMs from many providers, with routing and fallbacks

    FreemiumFree models · pay-as-you-go

    7/10