OpenAI

GPT-5.5

64% under OpenAI's list price on input and 70% on output

GPT-5.5 by OpenAI through the RelaySwitch API: $1.80 per million input tokens, $9.00 per million output tokens. Pay by card or crypto (Card, Apple Pay, PayPal, USDT, USDC, BTC, ETH, SOL). No KYC.

Input / M$1.80OpenAI list: $5.00
Cached input / M$0.16OpenAI list: $0.50
Output / M$9.00OpenAI list: $30.00

Specs

Model id
gpt-5.5
Developer
OpenAI
Context window
1.1M tokens
Max output
128K tokens
Input
text, image
Released
2026-04-24

Call it

bash
1curl https://api.relayswitch.io/v1/chat/completions \
2 -H "Authorization: Bearer $RELAYSWITCH_KEY" \
3 -H "Content-Type: application/json" \
4 -d '{
5 "model": "gpt-5.5",
6 "messages": [{"role": "user", "content": "Hello"}]
7 }'

Any OpenAI SDK works: set the base URL to https://api.relayswitch.io/v1 and the model to gpt-5.5. Get a key or read the docs.

More from OpenAI

FAQs

GPT-5.5: questions

Payment, keys and billing in short.

Open the console

A key in under a minute

Get a key

Or email hello@relayswitch.io

Run GPT-5.5 today

Top up by card or crypto and send "gpt-5.5".

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