gpt-5.4-pro· Released Mar 5, 2026

Name: gpt-5.4-pro
Brand: openai

openai/gpt-5.4-pro

GPT-5.4 Pro is OpenAI's most advanced model, building on GPT-5.4's unified architecture with enhanced reasoning capabilities for complex, high-stakes tasks. It features a 1M+ token context window (922K input, 128K...

Input

From$24.75/M

Output

From$148.50/M

Context

Up to 1.1M

Max output

Up to 128K

Modalities

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Input and output show the lowest price across upstreams, for reference. Your actual prices are listed per upstream below.

Upstreams & pricing

Upstream	Context	Max output	Input $/1M	Output $/1M	Cached input $/1M
Zenlayer AI Gateway-openai_compat (Global)From price	1.1M	128K	≤272K$24.75 >272K$49.50	≤272K$148.50 >272K$222.75	≤272K$24.75 >272K$49.50

Routed in real time — you pay the listed price of whichever upstream serves your call.

How to call

curlrequest.sh

curl https://api.tkex.ai/v1/chat/completions \
  -H "Authorization: Bearer $TX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-5.4-pro",
    "messages": [
      {"role": "user", "content": "Say hello in five words."}
    ]
  }'