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Capability gains

OpenAI releases o3-pro across ChatGPT and its API

OpenAI released o3-pro to ChatGPT Pro and Team users and the Responses API, using more inference compute and tools for more reliable expert reasoning.

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CURRENT ASSESSMENT · REVISION 1
TOWARD DOOM58confidence 96/100

Why it moved the index

A higher-compute reasoning tier with web, file, vision and Python tools expands reliable expert-task automation while paid access and hosted controls limit uncontrolled diffusion.

Assessment history

  1. R1
    Toward 58 · confidence 96

    New exact reasoning tier and immutable API snapshot with no durable collision.

    12 Aug 2026

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  1. DoomBench assesses “OpenAI releases o3-pro across ChatGPT and its API” as evidence moving toward doom, with magnitude 58 and confidence 96 out of 100 in the capability gains category.

  2. The DoomBench assessment of “OpenAI releases o3-pro across ChatGPT and its API” is based on reporting from OpenAI and records the editorial rationale, source quality, attribution, and revision history.

  3. DoomBench summarizes “OpenAI releases o3-pro across ChatGPT and its API” as follows: OpenAI released o3-pro to ChatGPT Pro and Team users and the Responses API, using more inference compute and tools for more reliable expert reasoning.

    https://www.doombench.com/news/openai-releases-o3-pro-across-chatgpt-and-its-api-2025-06-10