OpenAI changelog: January 2026

8 releases from Jan 13 to January 28, 2026

Everything OpenAI shipped in January 2026, collected from official OpenAI sources. Each entry is dated and links to the page it came from.

January 2026 at a glance

January 2026 was OpenAI's 2nd busiest month of the 12 months to then: 8 releases, about 2.6× its monthly average of 3. That was 1 release fewer than December 2025. Most were Product (3), followed by Developer Tools (2) and API (1).

Releases

-1 vs December 2025

Rank of 12 months

2nd

Average 3.1 a month

Most shipped

Product

3 releases

Notable OpenAI launches in January 2026

ModelJan 14
gpt-5.2-codex
Releases GPT-5.2-Codex to the Responses API, optimized for agentic coding tasks in Codex or similar environments.
Source: OpenAI API Changelog
ProductJan 26
Improvements to search response quality in Voice
OpenAI improved ChatGPT Voice search responses so they return more complete and up-to-date answers, including better shopping results. The update focused on making voice interactions more useful for live, search-heavy tasks.
Source: OpenAI Help Center Release Notes
ProductJan 22
5.2 personality system prompt update
OpenAI updated GPT-5.2 Instant's default personality to sound more conversational and adapt tone more naturally. The change kept personalization controls available in ChatGPT settings.
Source: OpenAI Help Center Release Notes

All OpenAI releases in January 2026

Newest first. Each entry links to the official page it came from.

January 20268 releases

Jan 28

Web search enabled by default

Web search enabled by default in Codex CLI and IDE extension with cached/live modes

CodexDeveloper ToolsSource: Codex Changelog

Jan 26

Improvements to search response quality in Voice

OpenAI improved ChatGPT Voice search responses so they return more complete and up-to-date answers, including better shopping results. The update focused on making voice interactions more useful for live, search-heavy tasks.

ChatGPTProductSource: OpenAI Help Center Release Notes

Jan 23

Team Config for shared configuration

Team Config for shared configuration across repositories and machines

CodexDeveloper ToolsSource: Codex Changelog

Jan 22

5.2 personality system prompt update

OpenAI updated GPT-5.2 Instant's default personality to sound more conversational and adapt tone more naturally. The change kept personalization controls available in ChatGPT settings.

ChatGPTProductSource: OpenAI Help Center Release Notes

Jan 20

Voice updates and age prediction

OpenAI shipped Voice updates for paid users, improving instruction following and fixing the custom-instructions repeat bug. It also started rolling out age prediction on consumer plans to apply teen-appropriate safeguards.

ChatGPTProductSource: OpenAI Help Center Release Notes

Jan 15

Open Responses spec announced

Announced Open Responses: an open-source spec for building multi-provider, interoperable LLM interfaces built on top of the original OpenAI Responses API.

OpenAI APIEcosystemSource: OpenAI API Changelog

Jan 14

gpt-5.2-codex

Releases GPT-5.2-Codex to the Responses API, optimized for agentic coding tasks in Codex or similar environments.

CodexModelSource: OpenAI API Changelog

Jan 13

Dedicated SIP IP ranges for the Realtime API

Added dedicated SIP IP ranges for Realtime API. sip.api.openai.com does GeoIP routing, and will direct SIP traffic to the closest region.

OpenAI APIAPISource: OpenAI API Changelog

Where January 2026 sits

OpenAI releases per month, for January 2026 and the 11 months before it. A taller bar means more releases that month; the dated entries for each month are on its own page.