GPT-5.3 Chat by OpenAI, chat-tuned model with a 272K context, vision, and tools for conversational use.
Available on
Pricing from$1.75/ 1M input$14.00/ 1M output272Kcontext
Privacy
- ZDR
- Training
- No
- Region
- EU
Run Droid on GPT-5.3 Chat
Droid is Factory's coding agent, running in the terminal, in IDEs, and in Factory's desktop app. It plans and executes real engineering tasks, and its bring-your-own-key support takes custom models on any OpenAI-compatible or Anthropic-compatible endpoint, on every plan. Add Opper as a custom model and you get one key to 700+ models, with usage billed straight through your Opper account.
RunDroidonin
DroidoninConnect Droid to GPT-5.3 Chat
Set up with agents
Paste this into your coding agent (Claude Code, Cursor, Codex, and more) and it will set up and build with Opper for you.
Where you can run it
GPT-5.3 Chat runs on the routes below. Route only to EU providers when your data has to stay in Europe.
| Provider | Region | Zero data retention | Training | Input | Output |
|---|---|---|---|---|---|
| Azure | EU | No | $1.75 | $14.00 |
The model
More apps on Opper
Claude Code
Anthropic's terminal coding agent. Run it on any model on Opper, not just Claude.
Coding
opper launch claude
Codex
OpenAI's open-source coding CLI. Run it on any model on Opper.
Coding
opper launch codex
DeepSeek Harness
DeepSeek's open-source coding agent. Add Opper as a custom provider to run it on any model, not just DeepSeek's.
Coding
OpenAI-compatible