by OpenAI
1050K context · $2.5000/M tokens
GPT-5.4 is OpenAI’s latest frontier model, unifying the Codex and GPT lines into a single system. It features a 1M+ token context window (922K input, 128K output) with support for...
Official website
https://openrouter.ai/models/openai/gpt-5.4
API Documentation
https://platform.openai.com/docs/api-reference