⚡️GPT-5.3-Codex: OpenAI’s most capable model for agentic coding and real computer work
OpenAI just introduced GPT-5.3-Codex, a next-gen Codex model built to handle end-to-end software tasks not just write snippets.
What’s new
• Agentic by design: Handles long, multi-step workflows involving planning, tool use, execution, and iteration
• Stronger real-world coding: Improved reasoning across large codebases, better debugging, testing, and refactoring
• Faster execution: ~25% speed boost vs prior Codex models, optimized for sustained work
• Beyond code: Can operate like a junior teammate helpin
OpenAI just introduced GPT-5.3-Codex, a next-gen Codex model built to handle end-to-end software tasks not just write snippets.
What’s new
• Agentic by design: Handles long, multi-step workflows involving planning, tool use, execution, and iteration
• Stronger real-world coding: Improved reasoning across large codebases, better debugging, testing, and refactoring
• Faster execution: ~25% speed boost vs prior Codex models, optimized for sustained work
• Beyond code: Can operate like a junior teammate helpin
