Ultra-fast and most cost-effective GPT-5 variant optimized for high-volume applications. Provides near-instant responses while maintaining GPT-5 intelligence, ideal for chatbots, customer support, and automated systems requiring speed and efficiency.
- Ultra-fast processing with near-instant response times at lowest GPT-5 pricing
- High-volume optimization perfect for applications requiring speed and cost efficiency
- Maintained intelligence delivering GPT-5 capabilities with maximum resource efficiency
- Built-in image generation supporting creative and visual content creation
- Ideal for automation including chatbots, customer support, and high-throughput applications
JSON Mode
Output responses in valid JSON format.
Image Generator
Generate images from text prompts.
Model Information
Supported Formats
GPT 5.5OpenAI's most advanced model released April 2026. GPT-5.5 is recommended for most reasoning workloads, combining frontier intelligence with configurable reasoning effort (none → xhigh). Available in API, Codex, and ChatGPT.
GPT 5.5 ProHighest-intelligence API option in the GPT-5.5 family. Use for the most challenging problems that require maximum reasoning depth and can tolerate higher latency. Supports full reasoning effort range from none to xhigh.
GPT 5.4GPT-5.4 is OpenAI's frontier model for complex professional work, designed for agentic, coding, and professional workflows with the highest reasoning capability. Features a 1.05M token context window, native computer use, and built-in support for web search, file search, and MCP.