GPT-5.4 API
GPT-5.4 by OpenAI through the RelaySwitch API: $1.50 per million input tokens, $9.00 per million output tokens. Pay by card or crypto (Card, USDT, USDC, BTC, ETH, SOL). No KYC.
Specs
- Model id
gpt-5.4- Developer
- OpenAI
- Context window
- 1.1M tokens
- Max output
- 128K tokens
- Input
- text, image
- Released
- 2026-03-05
Call it
curl https://api.relayswitch.io/v1/chat/completions \ -H "Authorization: Bearer $RELAYSWITCH_KEY" \ -H "Content-Type: application/json" \ -d '{ "model": "gpt-5.4", "messages": [{"role": "user", "content": "Hello"}] }'Any OpenAI SDK works: set the base URL to https://api.relayswitch.io/v1 and the model to gpt-5.4. Get a key or read the docs.
GPT-5.4 API key and pricing
One key covers GPT-5.4 and every other model in the catalog. Open the console with an email address, top up from $10 by card or in USDT, USDC, BTC, ETH, SOL, create a key, and send gpt-5.4 as the model. No identity check, no subscription; the balance moves only when you call.
Costs at the live rates above; input and output billed separately, per token, from the prepaid balance.
GPT-5.4 in JanitorAI, SillyTavern, Chub and Risu
One 2K-in / 300-out turn on GPT-5.4 costs $0.0057 at today's rate; a long chat resends its history, so the price grows with the context setting. The model field takes gpt-5.4 in every app; only the URL field differs.
JanitorAI
JanitorAI guideProxy URL https://api.relayswitch.io/v1/chat/completionsAPI key sk-relay-...Model gpt-5.4SillyTavern
SillyTavern guideCustom Endpoint (Base URL) https://api.relayswitch.io/v1API key sk-relay-...Model gpt-5.4Chub
Chub guideOpenAI Reverse Proxy URL https://api.relayswitch.io/v1API key sk-relay-...Model gpt-5.4Risu
Risu guideURL https://api.relayswitch.io/v1API key sk-relay-...Model gpt-5.4The same price on every model, ranked by use: best models for JanitorAI, SillyTavern and Chub.
No app? Chat with GPT-5.4 in the browser at Unrestrictable, with characters, images and video and no key to paste.
GPT-5.4: questions
Payment, keys and billing in short.
Run GPT-5.4 today
Top up by card or crypto and send "gpt-5.4".