AISystem

GPT-5.2

OpenAI's frontier model of late 2025, the base of the GPT-5.2 Thinking, Pro and Codex variants and the model behind OpenAI's in-house data agent.

reasoning-model

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Welcome to January 31, 2026 (theinnermostloop.substack.com)

GPT-5.2 is the OpenAI model the corpus most often uses as the frontier reference point in early 2026; its Thinking, Pro and Codex variants have their own entries. Here it is the model inside OpenAI’s in-house data agent, which helps make the company’s own decisions across 600 petabytes, and the model hobbyists pointed at all 675 open Erdős problems.

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Development timeline

Newest reporting dates first. Reporting dates may differ from event dates.

2026-05-26: A benchmark scores models on writing benchmarks

2026-01-31: OpenAI uses a model on 600 petabytes to make its own decisions

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Same as

http://www.wikidata.org/entity/Q137401468

Developed by

OpenAI

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GPT-5.2
Innermost Loop KB — secondary record
Reporting date: unknown
KB permalink: https://nicholsn.github.io/innermost-loop-kb/systems/gpt-5-2
Attributed sources:
- Welcome to January 31, 2026 — https://theinnermostloop.substack.com/p/welcome-to-january-31-2026
This citation does not imply independent verification of linked-source claims.

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