by OpenAI · Released 2026-03-03
GPT-5.3 Chat is an update to ChatGPT's most-used model that makes everyday conversations smoother, more useful, and more directly helpful. It delivers more accurate answers with better contextualization and significantly...
Real jobs this model can take on, based on what it can read and how it’s priced.
Turn a screenshot of a design into working code
understands images
Run an agent that calls your own tools and replies in clean JSON
tool calling · structured output
Standard OpenAI fields, grouped by what they control. Anything not listed is accepted and ignored.
The hard numbers — what it can take in, what it can give back, and where it stops.
No. OpenAI has retired GPT-5.3 Chat and it can no longer be called through OpenDunes. This page is kept as a record of what it did. The rest of the catalog is unaffected — every model still listed is billed per token in dinars from the same balance.
GPT-5.3 Chat reads up to 128K tokens in one request, and writes back up to roughly 12,000 words at once.
It reads text, images and files and replies with text. It also supports calling your own tools, replying in structured JSON and streaming its answer as it writes.
Yes. Top up your OpenDunes balance in dinars with a CIB or Edahabia card, then spend it on any model in the catalog from that same balance. No foreign card, no currency conversion, no subscription. GPT-5.3 Chat is not among them any more, but its replacements from the same lab are.
GPT-5.3 Chat is built by OpenAI, released on Mar 3, 2026. OpenDunes served it unchanged — same model, same weights, billed in dinars — until the lab retired it.