OpenAI's GPT-5.3-Codex thinks deeper and wider about coding work
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OpenAI's GPT-5.3-Codex thinks deeper and wider about coding work
"Codex has reached over 1 million developers, OpenAI claims. And while Anthropic's Claude Code has also seen rapid adoption, head-to-head data comparing the two tools remains scarce. SemiAnalysis reports that 4% of GitHub public commits, or new code uploaded to repositories, are currently being authored by Claude Code, and projects that figure could reach 20% or more by the end of 2026."
"Anthropic says its new Claude Opus 4.6 model, also announced Thursday, achieved top scores on several industry benchmarks including Humanity's Last Exam (complex multidisciplinary reasoning), GDPval-AA (economically valuable knowledge work), and BrowseComp (hard-to-find information search)."
GPT-5.3-Codex extends Codex beyond writing and reviewing code to a wider range of work tasks. The model combines coding performance of GPT-5.2-Codex with GPT-5.2 reasoning and runs 25% faster. It handles long-running tasks involving research, tool use such as web search or database calls, and complex execution and planning across work tasks and software development. Codex has reached over one million developers. Competing tools like Anthropic's Claude Code show rapid adoption, and SemiAnalysis estimates Claude-authored commits at 4% of public GitHub commits, potentially rising toward 20% by 2026. GPT-5.3-Codex achieves top scores on SWE-Bench Pro and Terminal-Bench 2.0 and can iterate autonomously over millions of tokens.
Read at Fast Company
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