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NEW AI: GPT-5-Codex in 8 mins! 💥 Claude Code Killer 💥

#AI Tools
2025-09-26 18:018 min read

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OpenAI has announced the launch of its new AI model, GPT5 Codex, designed for improved agentic coding and software engineering tasks. The model promises enhanced performance, with reports claiming it achieves higher accuracy over previous iterations, making it particularly effective for coding applications and issue resolution on platforms like GitHub. The discussion emphasizes the model's ability to optimize legacy code and integrate seamlessly into developer workflows, hinting at its applications in code review and automation. The speaker documents their own testing experience with Codex, showcasing its capabilities in updating outdated code and adding features efficiently. Moreover, the emphasis is placed on how Codex might redefine coding practices, especially for users dealing with legacy systems, providing a strategic advantage. Overall, Codex is positioned as a significant advancement in AI for software development, potentially enhancing the productivity of developers and the quality of generated code.

Key Information

  • OpenAI has launched a new model, GPT-5 Codex, which is optimized for coding tasks.
  • The model aims to improve agentic coding and is part of a suite of products that includes a command-line interface (CLI) and an extension.
  • GPT-5 Codex offers improvements over previous models in terms of speed and accuracy, specifically focusing on software engineering and programming tasks.
  • Recent benchmarks indicate that GPT-5 Codex outperforms its predecessor in solving GitHub issues and has a higher accuracy in code refactoring tasks.
  • The model has shown to handle legacy code more effectively, with the ability to generate new code and remove outdated code.
  • Integrations with GitHub and other IDEs allow direct usage of Codex for code reviews and testing.
  • OpenAI has aimed to enhance transparency by addressing concerns about previous models and providing performance verifications.
  • The model is reportedly efficient, using fewer tokens than GPT-5, which reduces operational costs and improves usage analytics.
  • OpenAI encourages users with legacy code to leverage Codex for code updates and maintenance, emphasizing its superior capabilities.

Timeline Analysis

Content Keywords

GPT-5 Codex

OpenAI has launched a new model named GPT-5 Codex, which is optimized for agentic coding and software engineering tasks. It includes various products like a CLI, extension, and a cloud-based code editor.

Coding Optimization

GPT-5 Codex is optimized for coding tasks, claiming to be faster and smarter than previous models, particularly for programming-related activities and refactoring tasks.

Benchmarking

The video compares performance benchmarks, stating GPT-5 Codex solves slightly more GitHub issues than its predecessor, with claims regarding speed and accuracy improvements.

GitHub Automation

The narrator explains using Codex for GitHub automation tasks, demonstrating its ability to review, refactor code, and manage pull requests effectively.

Code Review

Codex is emphasized as a tool specifically trained for code reviews, able to find critical flaws and reduce incorrect comments per pull request.

Legacy Code

The narrator discusses handling legacy code with Codex, suggesting that it assists in updating deprecated code and optimizing it to meet current standards.

User Experience

The narrator shares personal experiences using Codex to handle a project written 9 years ago, highlighting the tool's capacity to upgrade and manage older code bases efficiently.

Performance Improvement

The video concludes with a positive outlook on GPT-5 Codex, indicating it's a significant improvement over older versions, particularly in terms of efficiency and functionality.

Related questions&answers

What is GPT5?

GPT5 is a new model launched by OpenAI that is optimized for agentic coding.

What products are associated with Codex?

Codex includes a CLI, an extension, and a cloud-based code editor among other products.

How does GPT5 Codex compare to previous models?

GPT5 Codex is claimed to be faster and much smarter than the previous GPD5 model for programming-related tasks.

What are the metrics for GPT5 Codex performance?

GPT5 Codex has solved 74.5% of GitHub issues, compared to 73% solved by GPD5.

What improvements does GPT5 Codex have?

GPT5 Codex has a higher accuracy on software engineering tasks and better code refactoring capabilities compared to GPD5.

How does Codex assist in code reviews?

Codex has been trained specifically to assist in code reviews and identifying critical flaws in the code.

What is the accuracy of GPT5 Codex for code refactoring tasks?

GPT5 Codex has an accuracy of 52% for code refactoring tasks.

Can GPT5 Codex be used to automate GitHub issues?

Yes, GPT5 Codex can automate tasks in GitHub actions and assist in resolving GitHub issues.

Is there a difference in the number of tokens used by GPT5 and GPT5 Codex?

Yes, GPT5 Codex uses 93% fewer tokens than GPT5.

How can I start using Codex?

You can use Codex within a terminal or IDE and access it through the provided GitHub integration.

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