GPT-5.4

Name: GPT-5.4 API
Brand: OpenAI
Availability: InStock

gpt-5.4

Cheaper. More stable. One-stop API aggregation.

Introduction

GPT-5.4 is a proven production workhorse for chat and tool-calling.

Teams use it for customer support bots, internal copilots, and structured JSON extraction.

LumeAPI keeps the OpenAI request shape and bills at 50% off official list.

Prefer GPT-5.4 when you want a stable mid-tier model with predictable latency.

Pricing

Official$2.50 / $15.00

LumeAPI$1.25 / $7.50

per 1M tokens (in/out)

Endpoint

Base URL: https://api.lumeapi.site/v1

Auth: Authorization: Bearer <your-lumeapi-key>

Developer docs

Open the integration notes for this model, or the modality guide for request fields and polling.

Model docs All model docs Agent docs (llms.txt)

curl https://api.lumeapi.site/v1/chat/completions \
  -H "Authorization: Bearer $LUMEAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-5.4",
    "messages": [{"role":"user","content":"Hello"}]
  }'

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