AI API Router Directory

Vertex AI serves Google's Gemini models through Google Cloud's paid API (aiplatform.googleapis.com), with project-level billing and a choice between global and non-global endpoints; the generative-AI pricing URL now renders as the Agent Platform (Gemini Enterprise Agent Platform) pricing page. Published list prices per 1M tokens: Gemini 3.8 / 3.7 / 3.6 Flash are on introductory pricing of $0.75 input and $3.75 output through December 31, 2026, rising to $1.50 and $7.50 on January 1, 2027, while Gemini 3.5 Flash-Lite is $0.30 input and $2.50 output and Gemini 2.5 Flash is $0.30 and $2.50. The Vertex pricing page states no standing free monthly token allowance for Gemini; Google's free-tier documentation instead gives $300 in 90-day Free Trial credit and a separate free tier for many Gemini models under the Gemini Developer API (AI Studio).

Google Cloud Free Trial gives $300 in Welcome credit valid for 90 days for eligible new billing accounts (cloud.google.com/free/docs/free-cloud-features); the Vertex generative-AI pricing page itself lists no free token allowance but does include 5,000 free grounding queries per month across Gemini 3 models.

Mistral's La Plateforme is a first-party EU-based API with per-1M-token pricing, a 50% batch discount and up to 90% cached-input savings. The free plan includes $10/month of API credits plus Vibe and Studio access; Pro ($14.99/mo) raises that to $30/month. Open-weight models are available for self-hosting (Apache 2.0 for research/individual; commercial use requires a Mistral license).

Community reported approximate monthly value of the Experiment free tier for developers.

PublicAI is a decentralized AI data network and API gateway. It facilitates access to LLMs by leveraging a community-governed data infrastructure, offering an API platform for developers to integrate models with a focus on data transparency.

No public free-tier information found in the source reference; treat free-tier availability as unverified rather than confirmed absent.