GPT-5 mini is a smaller variant of GPT-5 optimized for throughput and cost. Great default for chat and classification.
curl https://oneapikey.app/v1/v1/chat/completions \
-H "Authorization: Bearer $ONEAPIKEY_API_KEY" \
-H "X-APIMarket-Product: gpt-5-mini" \
-H "Content-Type: application/json" \
--data '{"model":"openai/gpt-5-mini","messages":[{"role":"user","content":"hi"}]}'