OpenAI
GPT 5.3 Codex Thinking
GPT 5.3 Codex Thinking by OpenAI through the RelaySwitch API: $1.3329 per million input tokens, $10.6635 per million output tokens. Pay by card or crypto (Card, Apple Pay, PayPal, USDT, USDC, BTC, ETH, SOL). No KYC.
Input / M$1.3329per million tokens
Cached input / M$0.1333per million tokens
Output / M$10.6635per million tokens
Specs
- Model id
gpt-5.3-codex-thinking- Developer
- OpenAI
- Context window
- not published
- Max output
- not published
- Input
- text
Call it
bash
1
curl https://api.relayswitch.io/v1/chat/completions \2
-H "Authorization: Bearer $RELAYSWITCH_KEY" \3
-H "Content-Type: application/json" \4
-d '{5
"model": "gpt-5.3-codex-thinking",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-5.3-codex-thinking. Get a key or read the docs.
FAQs
GPT 5.3 Codex Thinking: questions
Payment, keys and billing in short.
Run GPT 5.3 Codex Thinking today
Top up by card or crypto and send "gpt-5.3-codex-thinking".