Example
http
curl -X POST https://api.openai.com/v1/responses/input_tokens \
-H "Content-Type: application/json" \
-H "Authorization: Bearer $OPENAI_API_KEY" \
-d '{
"model": "gpt-6-astra",
"input": "Tell me a joke."
}'Response
json
{
"object": "response.input_tokens",
"input_tokens": 11
}