Both OpenAI API and Google AI Studio offer free plans. OpenAI API is rated higher at 4.8/5 vs Google AI Studio's 4.5/5.

Developer API platform providing access to GPT-4o, DALL-E 3, Whisper, embeddings, and fine-tuning capabilities.

Google's free development environment for experimenting with Gemini models and generating API keys for production deployment.


Independent analysis based on features, pricing, and user ratings
OpenAI API uniquely offers GPT-4o access, DALL-E 3, Whisper speech-to-text. Google AI Studio uniquely offers Gemini 1.5 Pro/Flash, 2M context window, Multimodal input. Both share 2 features including Function calling, Streaming.
Both OpenAI API and Google AI Studio offer free plans.

Paid plans only

Free tier available