gpt-5.6-luna· Released Jul 9, 2026

Name: gpt-5.6-luna
Brand: openai

openai/gpt-5.6-luna

GPT-5.6 Luna is a fast, cost-efficient model in OpenAI's GPT-5.6 series. It is suited for high-volume, latency-sensitive tasks such as chat, classification, and lightweight agentic workflows, providing capable reasoning for...

Input

From$0.825/M

Output

From$4.95/M

Context

Up to 1.1M

Max output

Up to 128K

Modalities

FileImageTextText

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$0.825 >272K$1.65	≤272K$4.95 >272K$7.425	≤272K$0.0825 >272K$0.165

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-5.6-luna",
    "messages": [
      {"role": "user", "content": "Say hello in five words."}
    ]
  }'