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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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
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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 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.
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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.
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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