GPT-5.4 Nano is OpenAI's cheapest GPT-5.4-class model for simple high-volume tasks. Ideal for classification, data extraction, ranking, and sub-agents with fast speed and reasoning token support at the lowest cost.
- Cheapest GPT-5.4-class model optimized for classification, data extraction, ranking, and sub-agents.
- 400,000-token context window with 128,000 max output tokens and reasoning token support.
- Supports web search, file search, image generation, code interpreter, and MCP tools.
- Ultra-fast processing ideal for high-volume applications requiring speed and cost efficiency.
- Pricing is $0.20 per 1M input tokens and $1.25 per 1M output tokens (cached input at $0.02).
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.