Google AI Studio / Gemini API vs OpenAI API

Both are models-api tools. Google AI Studio / Gemini API is freemium (free tier (text models); paid from $0.75/1M input (Gemini 3.7 Flash promo till 2027-01)) with an API, a free tier; OpenAI API is paid (pay-as-you-go and from $0.20/1M input (GPT-5.6 Luna); GPT-5.6 Sol promotional $4/$20 at least through 2026-11-21 (list $5/$30); no free tier) with an API. The catalog stamp is ship for Google AI Studio / Gemini API and ship for OpenAI API, last verified 2026-09-01 and 2026-08-19 respectively.

Auto-paired from catalog data — the verdicts are hand-set, the pairing is algorithmic.

Google AI Studio / Gemini API

ship

Gemini API with a real free tier — huge context, multimodal, generous limits.

OpenAI API

ship

GPT-5 family and o-series reasoning models behind one API.

field	Google AI Studio / Gemini API	OpenAI API
pricing	freemium · free tier (text models); paid from $0.75/1M input (Gemini 3.7 Flash promo till 2027-01)	paid · pay-as-you-go, from $0.20/1M input (GPT-5.6 Luna); GPT-5.6 Sol promotional $4/$20 at least through 2026-11-21 (list $5/$30); no free tier
free tier	yes	no
open source	no	no
api	yes	yes
self-host	no	no
verdict	ship	ship
momentum	blueshift	steady
last verified	2026-09-01	2026-08-19
key limitation	Free-tier prompts may be used for training — read the terms.	Premium pricing at the frontier tier.

Open live compare →Google AI Studio / Gemini API pageOpenAI API pageGoogle AI Studio / Gemini API.jsonOpenAI API.json