SMRTR ProgrammingFeb 5, 2026ZDNet

OpenAI's new GPT-5.3-Codex is 25% faster and goes way beyond coding now - what's new

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OpenAI launched GPT-5.3-Codex, its most capable coding AI model that runs 25% faster and can handle multi-day tasks. Remarkably, this model helped debug and deploy parts of itself during development. The system supports the entire software lifecycle beyond coding, including debugging, deployment, monitoring, and creating documentation, while maintaining context during continuous interaction.

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