GPT-5.5 Model to reason over code, files and docs
OpenAI Chat and reasoning models Upgrade to use openai/gpt-5.5
OpenAI’s GPT-5.5 is the API model you pick when work needs deep chain reasoning over very large inputs, codebases and mixed files. It suits engineers, researchers and product teams that need reliable multi-step edits, file-aware answers and image-aware inspection.
What it can do
- Reads images and screenshots
- Searches the live web and cites sources
- Reads PDFs and documents
- Thinks step by step on hard questions
What people use it for
Audit and refactor a large codebase
Feed a full repository snapshot or long files and ask GPT-5.5 to find inconsistent patterns, propose concrete refactors and produce ready-to-run patch files. The model keeps context across millions of tokens so you can review architecture and implementation in one session.
Summarize and act on long reports or contracts
Upload multi-hundred-page documents and ask GPT-5.5 to extract obligations, flag risky clauses and draft precise revision language. Its very large context window reduces chunking and preserves cross-document links.
Debug, explain and extend code with files and images
Combine source files, logs and screenshots; ask the model to diagnose failures, write test cases and produce code fixes with explanations. GPT-5.5 is tuned for coding workflows and tool use, so it better follows intent and carries changes through the surrounding code.
Why it is worth it
- 1,000,000+ token context to keep whole projects and documents in one session.
- Multimodal input: text, files and images for grounded answers and file-aware edits.
- Stronger stepwise reasoning and result checking for multi-step professional work.
- Tool and web integration for searches, file reading and function calling in a single chat.
Questions people ask
When should I choose GPT-5.5 instead of a smaller model?
Pick GPT-5.5 when you need to reason over very large inputs, work across many linked files, or run multi-step coding and research tasks that must preserve context. For short prompts or lightweight tasks a smaller model will be cheaper and faster.
Can GPT-5.5 read my code, images and uploaded files in one session?
Yes. GPT-5.5 accepts text, files and images and can use hosted tools like file search and web search to ground its answers. On Katteb you can switch models mid-chat while keeping the same conversation.
How is usage billed on Katteb for GPT-5.5?
Katteb charges per message by actual usage in credits. GPT-5.5 costs 69 credits per message on Katteb; billing reflects the exact tokens used in each request.
