OpenAI has launched GPT-5.1-Codex-Max, a specialised coding mannequin designed to deal with complicated growth duties autonomously.
The brand new system represents a major leap in agentic AI capabilities, enabling machines to work on coding tasks with minimal human intervention. GPT-5.1-Codex-Max operates in another way from general-purpose AI fashions.
Constructed particularly for software program engineering, the mannequin options compaction expertise that allows it to course of thousands and thousands of tokens in a single session.
This breakthrough means builders can assign intensive refactoring tasks, debugging periods, and multi-hour agent loops to the AI.
Superior Structure Powers Unbiased Growth
Which completes them independently with out dropping context or coherence. The mannequin can maintain work for prolonged intervals.
In inside testing, GPT-5.1-Codex-Max accomplished duties working for over 24 hours, routinely managing its context window by compacting periods when needed.
This functionality transforms how groups method large-scale code modernization and complicated system upkeep. Efficiency benchmarks show substantial enhancements over earlier variations.
On SWE-bench Verified evaluations, GPT-5.1-Codex-Max achieves 77.9% accuracy in comparison with 73.7% from its predecessor.
Extra notably, the mannequin makes use of 30% fewer considering tokens whereas delivering superior outcomes, instantly translating to decreased computational prices for builders.
Frontend design duties showcase these effectivity positive factors successfully. GPT-5.1-Codex-Max produces high-quality interfaces with roughly 27,000 considering tokens, in comparison with 37,000 for older fashions.
Requiring fewer instrument calls and producing extra environment friendly code. The improved capabilities deliver accountability.
OpenAI acknowledges that superior coding fashions can, in idea, help in cybersecurity assaults. Nevertheless, the corporate states it hasn’t noticed significant abuse at scale.
The crew has already disrupted cyber operations by trying to misuse the mannequin. GPT-5.1-Codex-Max runs in a safe sandbox by default.
File operations stay confined to designated workspaces, and community entry stays disabled until explicitly enabled.
OpenAI recommends maintaining Codex restricted, as enabling web connectivity introduces immediate injection vulnerabilities. The corporate advises builders to overview all AI-generated code earlier than deployment.
Codex produces terminal logs and cites instrument calls, decreasing bug dangers, however ought to complement reasonably than change human code opinions.
GPT-5.1-Codex-Max is now out there by way of Codex for ChatGPT Plus, Professional, Enterprise, Edu, and Enterprise subscribers. API entry is coming quickly.
Internally, 95% of OpenAI’s engineers use Codex weekly, and adoption correlates with roughly 70% extra pull requests shipped.
The mannequin represents progress towards dependable AI coding companions that improve developer productiveness whereas sustaining safety requirements.
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