OpenAI and Stability AI are both listed under Generative AI in the DevPages directory. This page puts the details we hold for each of them side by side.
It does not score them and does not pick a winner. Fields the catalog has no value for say “Not recorded” rather than being filled in with a guess.
OpenAI vs Stability AI field by field
OpenAI, Stability AI compared field by field. Values are taken from the DevPages catalog; fields we hold no value for read “Not recorded”.
AI research company behind ChatGPT and the GPT models, with APIs for text, reasoning, image, speech and voice
OpenAI builds the GPT family of models and ChatGPT. In its API, GPT-6 Astra is the flagship model for complex reasoning and coding, and GPT-5.6 Sol, Terra and Luna trade intelligence against cost. It also offers GPT-Image-2.5 for image generation and editing, GPT-Transcribe for speech-to-text, and GPT-Live and GPT-Realtime models for voice. New integrations build on the Responses API; the older Assistants API was shut down on 26 August 2026.
Open-source generative AI company democratizing access to AI technology
Stability AI builds open-weight generative models for images, audio, 3D and video. Its current image models are the Stable Diffusion 3.5 family, with SDXL still available. It also offers Stable Audio 3.0 for sound and music, Stable Fast 3D and Stable Point Aware 3D for turning an image into a 3D asset, and Stable Video Diffusion. Models ship as downloadable weights under the Stability AI Community License, which is free for organisations with under US$1M in annual revenue, and through a developer platform API.
