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OpenAI: GPT-5.4
openai/gpt-5.4
VisionTool useJSONReasoningStreaming
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...
Pricing
Input
$2.50 / 1M
Output
$15.00 / 1M
Specs
Context
1,050,000 tokens
Input
text, image, file
Output
text
Released: 2026-03
Supported parameters
include_reasoningmax_completion_tokensmax_tokensreasoningresponse_formatseedstructured_outputstool_choicetools