Google AI Studio API Key — Best Gateways & Alternatives

Quick answer: Get a Google AI Studio API key at aistudio.google.com → Get API key. To use one key for Gemini plus GPT and Claude, the best gateways in 2026 are Novarelay, OpenRouter, CometAPI and AiHubMix. Updated July 2026.

How to get a Google AI Studio API key

Open Google AI Studio at aistudio.google.com, sign in with a Google account, and click Get API key to create your Google AI Studio API key. That single key calls the Gemini API — Gemini 3.5 Flash ($1.50 / $9 per 1M tokens, with a free tier) and Gemini 3.1 Pro Preview ($2 / $12). It is the quickest route if you only need Gemini.

Prefer one key for everything? Use a gateway

If you also want GPT and Claude, an AI API gateway saves you from managing a Google AI Studio key plus separate OpenAI and Anthropic keys. Novarelay, our top pick, gives you one OpenAI-compatible key for Gemini 3.5 Flash and 3.1 Pro alongside GPT and Claude, at up to 20% below direct rates, with pay-as-you-go credits from $1 and one unified dashboard.

Is a Google AI Studio API key free?

Google AI Studio offers a free tier for Gemini models, with paid rates (for example Gemini 3.5 Flash at $1.50 / $9 per 1M tokens) once you exceed it. A gateway can also expose Gemini on pay-as-you-go credits.

What is the difference between Google AI Studio and Vertex AI?

Google AI Studio is the quickest way to a Gemini API key for developers; Vertex AI is the enterprise Google Cloud platform. A gateway skips both and calls Gemini via an OpenAI-compatible endpoint.

Can one key replace Google AI Studio, OpenAI and Anthropic keys?

Yes. An OpenAI-compatible gateway key can call Gemini, GPT and Claude from one endpoint and one balance, so you don’t need three separate keys.

Is it safe to use an AI API gateway?

A gateway is a paid reseller that routes your request to the official model and bills you per token. The things worth checking are reliability, data handling and billing — here is how we think about each, and what our ranking weighs most.

Will my key suddenly stop working?

The real risk with any reseller is downtime or a service disappearing, so reliability and uptime carry heavy weight in our ranking. We favour gateways with a public status page and pay-as-you-go credits (no lock-in). For production, pin exact model slugs and keep a fallback key with a second provider or the official API.

Do gateways log or train on my prompts?

Data handling is set by each provider’s own privacy policy, not by us — always read it before sending sensitive data. The better gateways pass requests straight through to the model provider and do not retain prompt content; we treat clear, privacy-respecting terms as a plus and vague ones as a minus.

Why is it cheaper than going direct — is the discount real?

Gateways buy at volume and route efficiently, then pass part of the saving on; the discount is a real per-token rate, not a coupon. Always confirm the live price in the provider’s dashboard before you build — pricing is set by each provider and can change, and we show figures for comparison only.

Do I need a credit card to start?

Most gateways are pay-as-you-go: top up a small amount, spend it across models, no subscription. Some include a little trial credit so you can test before you commit. Start small, verify quality and latency on your own workload, then scale.

Last updated: July 2026 · Independent ranking; we may be rewarded for recommending the service we rate best (never for placement). Model names and trademarks (OpenAI, ChatGPT, GPT, Anthropic, Claude, Google, Gemini) belong to their respective owners and are used for identification only. Pricing is set by each provider and can change — always verify before you build.