OpenAI launches new agentic coding model only minutes after Anthropic drops its own - TechCrunch
Quick Answer
OpenAI has launched GPT-5.3 Codex, an upgraded agentic coding model, which is 25% faster than GPT-5.2 and capable of creating complex applications from scratch.
Quick Take
This release follows closely after Anthropic's similar model, highlighting a competitive race in AI coding tools.
Key Points
- GPT-5.3 Codex can perform nearly all computer tasks for developers.
- The model can create complex games and apps in days.
- OpenAI's team used early versions of the model for self-debugging.
- Anthropic released its agentic coding model just 15 minutes earlier.
- GPT-5.3 Codex is designed to expand software development accessibility.
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~2 min readIn Brief
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On Monday, OpenAI launched Codex, an agentic coding tool marketed to software developers. Today, OpenAI also launched a new model designed to turbo-charge Codex: GPT-5.3 Codex.
The company says that the model transforms Codex from an agent that can merely “write and review code” to one that can do “nearly anything developers and professionals do on a computer, expanding who can build software and how work gets done.” Having tested its new model against a number of performance benchmarks, OpenAI claims that it can create “highly functional complex games and apps from scratch over the course of days.”
OpenAI says that GPT-5.3 Codex is also 25% faster than its previous model (GPT-5.2) and that it was the company’s first model that “was instrumental in creating itself,” meaning that the company’s staff used early versions of the program to debug itself and evaluate how it was performing.
The new model release notably follows hot on the heels of a new agentic coding model released by its competitor, Anthropic. Indeed, OpenAI and Anthropic had originally planned to release their two agentic coding tools at the exact same time: 10 a.m. PST. However, not long before the original release time, Anthropic moved its release date up by 15 minutes, slightly besting OpenAI in the race to publicize the models.
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