GPT-5.4 Mini is OpenAI's strongest small model, improving over GPT-5 Mini in coding and reasoning while running more than 2x faster, with a 400k context window.
Available on
Privacy
- ZDR
- Training
- No
- Region
- EU + US
Kilo Code is an open-source AI coding agent for VS Code. It combines autonomous editing, planning and architect modes, and an OpenAI-compatible provider so you can bring the model of your choice. Add Opper as that provider with a base URL and key, and you can run it on any of 700+ models on one gateway, with a choice of region.
Paste this into your coding agent (Claude Code, Cursor, Codex, and more) and it will set up and build with Opper for you.
GPT-5.4 Mini runs on the routes below. Route only to EU providers when your data has to stay in Europe.
GPT-5.4 Mini is OpenAI's strongest small model, improving over GPT-5 Mini in coding and reasoning while running more than 2x faster, with a 400k context window.
Point Cursor's OpenAI base URL at Opper to run it on any of 700+ models.
OpenAI-compatibleCline's OpenAI-Compatible provider points straight at Opper's gateway.
OpenAI-compatibleAdd Opper as an OpenAI provider in config.yaml and Continue's chat, edit and autocomplete run on any model.
OpenAI-compatible