by OpenAI · Released 2026-04-24
GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token...
Real jobs this model can take on, based on what it can read and how it’s priced.
Read a 300-page contract and answer questions about it
1.1M-token context · accepts PDFs
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
Work through a hard problem step by step, not just answer it
step-by-step reasoning
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-5.5 (batch) 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-5.5 (batch) reads up to 1.1M tokens in one request, and writes back up to roughly 96,000 words at once.
It reads text, images and files and replies with text. It also supports calling your own tools, replying in structured JSON, step-by-step reasoning 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-5.5 (batch) is not among them any more, but its replacements from the same lab are.
GPT-5.5 (batch) is built by OpenAI, released on Apr 24, 2026. Its training data runs to 2025-12-01. OpenDunes served it unchanged — same model, same weights, billed in dinars — until the lab retired it.