GPT-5.3-Codex | Official
GPT-5.3-Codex is OpenAI's most advanced agentic coding model that combines frontier coding capabilities with enhanced reasoning, runs 25% faster, and was instrumental in creating itself.
https://chatgpt.com/
Product Information
Updated:Feb 16, 2026
GPT-5.3-Codex | Official Monthly Traffic Trends
GPT-5.3-Codex achieved 6.2B visits with a 4.4% increase in monthly traffic. This slight growth can be attributed to the release of GPT-5.2 and the introduction of Your Year with ChatGPT, a Spotify Wrapped-style annual review feature, which likely engaged existing users and attracted new ones.
What is GPT-5.3-Codex | Official
Released on February 5, 2026, GPT-5.3-Codex is OpenAI's latest and most capable AI coding model that builds upon GPT-5.2-Codex and GPT-5.2. It is available to all paid ChatGPT users across multiple surfaces including the Codex app, CLI, IDE extensions, and web interface. The model represents a significant advancement in AI development as it was the first OpenAI model that helped in its own creation, being used by the Codex team to debug its training, manage deployment, and diagnose test results.
Key Features of GPT-5.3-Codex | Official
GPT-5.3-Codex is OpenAI's most advanced agentic coding model that combines enhanced coding capabilities with professional knowledge and reasoning abilities. It offers 25% faster performance compared to previous versions and is available across multiple platforms (app, CLI, IDE extension, web) for paid ChatGPT users. The model can handle complex, long-running tasks involving research, tool use, and execution while allowing real-time user interaction and steering without losing context.
Interactive Development Experience: Users can steer and interact with the model in real-time during complex tasks, with frequent progress updates and context retention
Enhanced Performance: 25% faster inference speed compared to previous versions, with significant improvements on benchmarks like SWE-Bench Pro (57%) and Terminal-Bench 2.0 (77.3%)
Comprehensive Development Support: Handles the entire software lifecycle including debugging, deploying, monitoring, writing PRDs, editing copy, user research, tests, and metrics
Advanced Safety Features: Includes comprehensive cybersecurity safety stack with dual-use safety training, automated monitoring, and trusted access controls
Use Cases of GPT-5.3-Codex | Official
Full-Stack Development: Can autonomously build complex web applications and games, including deployment to cloud platforms like Cloudflare, Netlify, and Vercel
DevOps and Infrastructure Management: Assists in debugging, deployment management, and infrastructure scaling tasks including GPU cluster adaptation
Software Documentation and Testing: Generates comprehensive documentation, conducts user research, and creates test suites for software projects
Pros
Significantly improved performance and speed compared to previous versions
Comprehensive coverage of entire software development lifecycle
Real-time interactive development capabilities with context retention
Cons
Limited to paid ChatGPT plans only
API access not immediately available
High cybersecurity classification may require additional safety measures
How to Use GPT-5.3-Codex | Official
Sign up for paid ChatGPT plan: GPT-5.3-Codex is only available with paid ChatGPT plans (Plus, Pro, Business, Enterprise, or Edu). You cannot access it with free accounts.
Choose your preferred access method: GPT-5.3-Codex can be accessed through multiple interfaces: Codex app (macOS only currently), Command Line Interface (CLI), IDE extensions, or web interface at chatgpt.com/codex
Download and install Codex app (if using app): Download the Codex app from openai.com/codex if you want to use the desktop application. Currently only available for macOS, with Windows support coming soon.
Sign in with ChatGPT credentials: Launch your chosen Codex interface and sign in using your ChatGPT account credentials. Authentication will complete automatically.
Select GPT-5.3-Codex model: In the model selector within the composer interface, choose GPT-5.3-Codex as your model.
Start using the model: You can now use GPT-5.3-Codex for coding tasks, debugging, deployment, documentation, and other development work. The model allows real-time interaction and steering during long-running tasks.
Monitor usage limits: Keep track of your usage as it counts against your ChatGPT plan's allocation. Different subscription tiers have different usage limits.
GPT-5.3-Codex | Official FAQs
GPT-5.3-Codex is OpenAI's most capable agentic coding model that combines the coding abilities of GPT-5.2-Codex and reasoning capabilities of GPT-5.2 into one model. It supports the entire software lifecycle including debugging, deploying, monitoring, writing PRDs, editing copy, user research, tests, and metrics.
GPT-5.3-Codex | Official Video
Related Articles
Analytics of GPT-5.3-Codex | Official Website
GPT-5.3-Codex | Official Traffic & Rankings
6.2B
Monthly Visits
#6
Global Rank
#1
Category Rank
Traffic Trends: Nov 2024-Oct 2025
GPT-5.3-Codex | Official User Insights
00:06:25
Avg. Visit Duration
3.84
Pages Per Visit
31.18%
User Bounce Rate
Top Regions of GPT-5.3-Codex | Official
US: 19.78%
IN: 7.03%
BR: 5.24%
JP: 3.8%
GB: 3.34%
Others: 60.81%
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