References 586% CONFIDENCEOverall confidence: 86%How well the pin's source and references back up its dates.Weighted average of how firmly 5 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better

The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.

• [1]95%
  OpenAI Model Release Notes: Introducing GPT-5.3-Codex (February 5, 2026)

  help.openai.com· Posted Sep 19, 2026· Starts Feb 5, 2026· 26% of score

  OpenAI's^[2][3] own model release notes date this entry February 5, 2026

• [2]90%
  GPT-5.3-Codex Model | OpenAI API

  developers.openai.com· Added Sep 22, 2026· 26% of score

  OpenAI's^[1][3] API model page for GPT-5.3-Codex lists low/medium/high/xhigh reasoning effort, a 400,000 context window, 128,000 max output tokens, Aug 31, 2025 knowledge cutoff and $1.75/$14 per 1M tokens.

• [3]85%
  Introducing GPT-5.3-Codex

  openai.com· Added Sep 19, 2026· Starts Feb 5, 2026· 26% of score

  OpenAI's^[1][2] announcement post, linked from the release note entry.

• [4]70%
  GPT-5.3-Codex Launches: OpenAI's Fastest AI Coding Agent Sets New Benchmark Records | Ubergizmo

  ubergizmo.com· Published Feb 8, 2026· 11% of score

  Independent report giving the SWE-bench Pro (Public) 56.8%, Terminal-Bench 2.0 64.0% to 77.3% and OSWorld-Verified 64.7% (previous generation 38.2%) figures and carrying the three launch benchmark charts used on this pin.^[1]

• [5]70%
  OpenAI releases 'GPT-5.3-Codex,' demonstrating its capabilities not only in coding but also in office work, with higher performance and speed than the previous generation - GIGAZINE

  gigazine.net· Published Feb 6, 2026· 11% of score

  Independent launch report whose screenshots of OpenAI's^[1][2][3] charts show Terminal-Bench 2.0 (GPT-5.3-Codex 77.3%, GPT-5.2-Codex 64.0%, GPT-5.2 62.2%) and OSWorld-Verified (64.7%, 38.2%, 37.9%), and the racing-game demo used as a picture here.

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