OpenAI TTS-1 HD

OpenAI's high-definition text-to-speech model with six built-in voices. Clear, natural speech optimized for quality over latency.

GPT Image 1.5

OpenAI's latest image generation model with strong instruction following, optional transparent backgrounds, and quality controls.

GPT Image 1.5 (Low)

GPT Image 1.5 with `quality=low` for faster and cheaper generations.

GPT Image 1.5 (Medium)

GPT Image 1.5 with `quality=medium` for balanced cost and quality.

GPT Image 1.5 (High)

GPT Image 1.5 with `quality=high` for maximum fidelity.

GPT-5.2 Chat

GPT-5.2 Chat (AKA Instant) is the fast, lightweight member of the 5.2 family, optimized for low-latency chat while retaining strong general intelligence. It uses adaptive reasoning to selectively "think" on harder queries, improving accuracy on math, coding, and multi-step tasks without slowing down typical conversations. The model is warmer and more conversational by default, with better instruction following and more stable short-form reasoning. GPT-5.2 Chat is designed for high-throughput, interactive workloads where responsiveness and consistency matter more than deep deliberation.