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OpenAI releases GPT-5.2-Codex for long-horizon coding and cyber work

OpenAI released GPT-5.2-Codex to paid Codex users with stronger long-horizon software engineering and its most advanced released cybersecurity capability at the time.

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CURRENT ASSESSMENT · REVISION 1
TOWARD DOOM53confidence 88/100

Why it moved the index

The release combined stronger long-horizon coding autonomy with a material cyber-capability increase, while paid access and planned cautious API rollout moderated immediate reach.

Assessment history

  1. R1
    Toward 53 · confidence 88

    New dated exact-model release supported by its launch and same-day system-card addendum.

    11 Aug 2026

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DoomBench social sharing card for OpenAI releases GPT-5.2-Codex for long-horizon coding and cyber work.

  1. DoomBench assesses “OpenAI releases GPT-5.2-Codex for long-horizon coding and cyber work” as evidence moving toward doom, with magnitude 53 and confidence 88 out of 100 in the capability gains category.

  2. The DoomBench assessment of “OpenAI releases GPT-5.2-Codex for long-horizon coding and cyber work” is based on reporting from OpenAI and records the editorial rationale, source quality, attribution, and revision history.

  3. DoomBench summarizes “OpenAI releases GPT-5.2-Codex for long-horizon coding and cyber work” as follows: OpenAI released GPT-5.2-Codex to paid Codex users with stronger long-horizon software engineering and its most advanced released...

    https://www.doombench.com/news/openai-releases-gpt-5-2-codex-for-long-horizon-coding-and-cyber-work-2025-12-18