Architectural Reasoning
Use the gpt 5.1 codex max for system-wide refactoring. This gpt model suggests structural fixes rather than just tokens.
gpt-5.1-codex-max / file-analysis
chat gpt 5.1 codex max is a flagship coding model by OpenAI. It features a 512k context window and specialized reasoning for repository-scale architecture refactoring and autonomous bug-fixing with SOTA performance across 80+ languages.
$ 0.875
$ 1.25
file
$ 7
$ 10
text
API
File Analysis
curl --request POST "https://gptproto.com/v1/responses" \
--header "Authorization: Bearer $GPTPROTO_API_KEY" \
--header "Content-Type: application/json" \
--data '{
"model": "gpt-5.1-codex-max",
"input": [
{
"role": "user",
"content": [
{
"type": "input_text",
"text": "what is in this file?"
},
{
"type": "input_file",
"file_url": "https://tos.gptproto.com/resource/gptproto.pdf"
}
]
}
]
}'chat gpt 5.1 codex max Features
Discover the standout capabilities of the chat gpt 5.1 codex max, from its 512k window to agentic gpt reasoning paths.
Visual-to-Code Synthesis
Turn screenshots into code with gpt 5.1. The codex max vision integration creates React components from your chat uploads.
Agentic Native Tooling
The chat gpt 5.1 codex max features a planning phase. This gpt self-corrects logic before completing your coding chat request.
Repository-Scale Context
Ingest 512k tokens in a single chat. The gpt 5.1 codex max maintains near-perfect accuracy across your entire codebase.
How to Get a gpt-5.1-codex-max API Key
Getting a gpt-5.1-codex-max API key takes four steps and a few minutes. Create a free GPTProto account, add credits, generate your key, and make your first call — at $0.875 / $7 it's a cheaper gpt-5.1-codex-max API key than going direct, and one key works across every model on the platform. Full gpt-5.1-codex-max Documentation is in the docs.
Sign up
Create your free GPT Proto account to begin. You can set up an organization for your team at any time.
Top up
Your balance can be used across all models on the platform, including gpt-5.1-codex-max, giving you the flexibility to experiment and scale as needed.
Generate your API key
In your dashboard, create an API key — you'll need it to authenticate when making requests to gpt-5.1-codex-max.
Make your first API call
Use your API key with our sample code to send a request to gpt-5.1-codex-max via GPT Proto and see instant AI-powered results.
chat gpt 5.1 codex max FAQ
Find answers about the chat gpt 5.1 codex max model, including its unique codex max capabilities and how this gpt release improves your coding chat experience.
How does chat gpt 5.1 codex max handle large repos?
The chat gpt 5.1 codex max model utilizes a massive 512,000 token context window. This allows the gpt to ingest entire directories during a chat, ensuring the codex max logic maintains 99.8% retrieval accuracy. This gpt version is built for repository-scale reasoning, making it simple to chat about complex architectural changes across hundreds of files simultaneously without losing track of the structural chat context.
Is chat gpt 5.1 codex max good for UI design?
Yes, the chat gpt 5.1 codex max includes native multimodal vision. You can start a chat by uploading a Figma screenshot or a whiteboard drawing, and the gpt will generate production-ready React or Tailwind code. This codex max feature allows for a seamless transition from visual design to functional code within a single chat session, making it a highly versatile gpt 5.1 tool for frontend developers.
What coding languages does this gpt model support?
This gpt release supports over 80 programming languages. While it is SOTA in Rust, Go, and TypeScript, you can chat with the gpt 5.1 codex max about almost any stack. The codex max training data includes diverse repository patterns, allowing the chat interface to provide expert-level help for legacy migrations, quantitative physics scripts, or modern microservices in a single coding chat.
Why is the gpt 5.1 codex max price premium?
The chat gpt 5.1 codex max is a high-performance tool. While the gpt 5.1 input is $10 per 1M tokens, the codex max efficiency reduces the need for complex RAG setups. Using this gpt for a coding chat often results in a lower total cost of ownership because the 512k context window handles more logic natively than smaller gpt models, making each chat more valuable for your business.
How does this chat experience stay secure?
When you use the chat gpt 5.1 codex max through our API, we enforce a zero-retention policy. Your proprietary code used in the gpt chat is never used for training. This ensures that enterprise teams can leverage gpt 5.1 and the codex max capabilities for sensitive projects without compromising data privacy or security standards during any chat session on our platform.
Can I use chat gpt 5.1 codex max for debugging?
Absolutely. The chat gpt 5.1 codex max is specifically trained on trace logs and multi-threaded execution patterns. This gpt is perfect for a chat about concurrency issues, race conditions, or memory leaks. The codex max reasoning paths allow the gpt to suggest precise fixes that standard chat models might miss during a debugging chat, ensuring your gpt 5.1 output is actually runnable.
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