LLM/AI Changelog

Updated 3 Jul 2026

AI Platform Changes That Affect Brand Visibility

Every update to ChatGPT, Gemini, Perplexity, Copilot and Google Search can change how your brand appears in AI-generated answers. We track release notes, API changes and documentation updates across major LLM platforms so you don't have to.

Total Updates
1,406
Copilot
771
ChatGPT
304
Gemini
296
Claude
70
GoogleAI
26
Perplexity
17
Pinned Highlights · 84
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today Jan 2025 Apr Jul Oct Jan 2026 Apr Jul 7 Jan 2025 · Copilot — Outlook: Switch between Work and Web grounding in Microsoft 365 Copilot Chat 8 Jul 2025 · Copilot — Excel: Copilot in Excel with Python | Reasoning Model Integration (Think Deeper) 22 Jul 2025 · Copilot — Microsoft 365 Copilot Chat: Researcheravailable in GA 19 Aug 2025 · Copilot — Microsoft 365 Copilot Chat: GPT-5 now available in Copilot Chat 3 Sep 2025 · Copilot — Microsoft 365 Copilot Chat: Personalize interactions with Copilot Memory 16 Sep 2025 · ChatGPT — September 16, 2025 — Improvements to search in ChatGPT 29 Sep 2025 · ChatGPT — September 29, 2025 — Introducing Instant Checkout and the Agentic Commerce Proto… 14 Nov 2025 · Perplexity — What We Shipped - November 14th 18 Nov 2025 · Gemini — 2025.11.18 24 Nov 2025 · ChatGPT — November 24, 2025 — Shopping research in ChatGPT 5 Dec 2025 · Perplexity — What We Shipped - December 5th 12 Dec 2025 · Perplexity — What We Shipped - December 12th 23 Dec 2025 · Copilot — Microsoft 365 Copilot app: GPT-5 powers Copilot Chat by default 15 Jan 2026 · ChatGPT — January 15, 2026 — Improved memory for finding details from past chats (Plus & P… 22 Jan 2026 · ChatGPT — January 22, 2026 — 5.2 Personality System Prompt Update 26 Jan 2026 · ChatGPT — January 26, 2026 — Improvements to search response quality in Voice 27 Jan 2026 · Copilot — Microsoft 365 Copilot Chat: Copilot Chat model selector now offers GPT-5.2 30 Jan 2026 · ChatGPT — January 30, 2026 — More visual responses 4 Feb 2026 · ChatGPT — February 4, 2026 — Update on thinking time settings for GPT-5.2 Thinking in Chat… 6 Feb 2026 · Perplexity — Perplexity Update - February 6th, 2026 9 Feb 2026 · ChatGPT — February 9, 2026 — Testing ads in ChatGPT (Free, Go) 10 Feb 2026 · ChatGPT — February 10, 2026 — Updates to deep research 10 Feb 2026 · ChatGPT — February 10, 2026 — GPT-5.2 Instant Update 12 Feb 2026 · Gemini — 2026.02.12 13 Feb 2026 · Perplexity — What We Shipped - February 13, 2026 13 Feb 2026 · ChatGPT — February 13, 2026 — ChatGPT updates: Better file uploads, easier copying, and mo… 19 Feb 2026 · Gemini — 2026.02.19 20 Feb 2026 · Perplexity — What We Shipped - February 20th, 2026 20 Feb 2026 · ChatGPT — February 20, 2026 — Expanded context window for Thinking 24 Feb 2026 · Copilot — Microsoft 365 Copilot extensibility: Declarative agents upgraded to GPT‑5.1 25 Feb 2026 · ChatGPT — February 25, 2026 — Add sources to your projects from anywhere 3 Mar 2026 · ChatGPT — March 3, 2026 — GPT-5.3 Instant Update 4 Mar 2026 · GoogleAI — Removed outdated information about JavaScript and accessibility 5 Mar 2026 · ChatGPT — March 5, 2026 — GPT-5.4 Thinking in ChatGPT 10 Mar 2026 · Copilot — Microsoft 365 Copilot Chat: Explainable AI with deep and inline citations for co… 24 Mar 2026 · ChatGPT — March 24, 2026 — Shopping updates in ChatGPT 2 Apr 2026 · ChatGPT — April 2, 2026 — ChatGPT in Apple CarPlay 9 Apr 2026 · ChatGPT — April 9, 2026 — GPT-5.3 Instant mini in ChatGPT 13 Apr 2026 · GoogleAI — Introducing a new spam policy for "back button hijacking" 14 Apr 2026 · Gemini — April 14, 2026 14 Apr 2026 · GoogleAI — Clarifying the use of spam reports 15 Apr 2026 · Gemini — April 15, 2026 15 Apr 2026 · Gemini — 2026.04.15 16 Apr 2026 · Claude — April 16, 2026 — Claude Opus 4.7 launch 16 Apr 2026 · ChatGPT — April 16, 2026 — Rolling out ads in Australia, New Zealand, and Canada 17 Apr 2026 · Perplexity — Personal Computer on Mac Launch and Computer Updates - April 17, 2026 20 Apr 2026 · GoogleAI — Added a section about "read more" deep links 21 Apr 2026 · Gemini — April 21, 2026 21 Apr 2026 · Copilot — Microsoft 365 Copilot chat: Rich Bing web answer cards in Copilot Chat 22 Apr 2026 · ChatGPT — April 22, 2026 — Fast answers in ChatGPT 22 Apr 2026 · ChatGPT — April 22, 2026 — ChatGPT for Clinicians 23 Apr 2026 · ChatGPT — April 23, 2026 — GPT-5.5 in ChatGPT 30 Apr 2026 · GoogleAI — Expanding preferred sources to all languages where Google Search is available 5 May 2026 · ChatGPT — May 5, 2026 — Memory sources and more personalized responses in ChatGPT 5 May 2026 · ChatGPT — May 5, 2026 — GPT-5.5 Instant in ChatGPT 8 May 2026 · GoogleAI — Deprecating the FAQ rich result feature 12 May 2026 · ChatGPT — May 12, 2026 — More images in answers for Free users 15 May 2026 · ChatGPT — May 15, 2026 — Personal finances in ChatGPT 15 May 2026 · GoogleAI — Adding a new guide on optimizing for generative AI features 15 May 2026 · GoogleAI — Clarifying that spam policies apply to generative AI responses in Google Search 15 May 2026 · GoogleAI — Clarifying that spam policies apply to generative AI responses in Google Search 19 May 2026 · Copilot — Microsoft 365 Copilot Chat: OpenAI’s GPT‑5.5 Instant available in Copilot Chat [… 19 May 2026 · Copilot — Microsoft 365 Copilot Chat: OpenAI’s GPT 5.5 Thinking available in Copilot Chat … 19 May 2026 · Gemini — May 19, 2026 20 May 2026 · GoogleAI — Added hasAdultConsideration to product-related structured data types 21 May 2026 · Claude — May 21, 2026 — Claude now works with more security and compliance tools 21 May 2026 · ChatGPT — May 21, 2026 — Codex updates: richer context, goal mode, browser improvements, a… 27 May 2026 · GoogleAI — Preferred sources is available in AI Mode and AI Overviews 28 May 2026 · ChatGPT — May 28, 2026 — GPT-5.5 Instant Update 28 May 2026 · Claude — May 28, 2026 — Claude Opus 4.8 launch 4 Jun 2026 · ChatGPT — June 4, 2026 — Memory that stays more up to date 4 Jun 2026 · ChatGPT — June 4, 2026 — Lockdown Mode is now available to all logged-in users 4 Jun 2026 · ChatGPT — June 4, 2026 — Rolling out ads in the UK 8 Jun 2026 · ChatGPT — June 8, 2026 — ChatGPT app experience updates 9 Jun 2026 · Claude — June 9, 2026 — Claude Fable 5 launch 10 Jun 2026 · ChatGPT — June 10, 2026 — Simplified controls in the model picker 12 Jun 2026 · ChatGPT — June 12, 2026 — Retiring GPT-5.2 models 12 Jun 2026 · Claude — June 12, 2026 — Fable 5 and Mythos 5 access suspended 15 Jun 2026 · GoogleAI — Clarifying guidance on llms.txt files 16 Jun 2026 · Copilot — Microsoft 365 Copilot Chat: Anthropic’s Claude now available in Microsoft 365 Co… 19 Jun 2026 · Perplexity — Deep Research, command panel, and enterprise controls - June 19, 2026 24 Jun 2026 · ChatGPT — June 24, 2026 — GPT-5.5 Instant Update 26 Jun 2026 · ChatGPT — June 26, 2026 — Retiring GPT-4.5 30 Jun 2026 · Claude — June 30, 2026 — Claude Sonnet 5 launch
1,401–1,406 of 1,406 updates
ChatGPT
ChatGPT 14 Mar 2023 chatgpt

March 14, 2023 — Announcing GPT-4 in ChatGPT

We’re excited to bring GPT-4, our latest model, to our ChatGPT Plus subscribers.
GPT-4 has enhanced capabilities in:
Advanced reasoningComplex instructionsMore creativity
To give every Plus subscriber a chance to try the model, we'll dynamically adjust the cap for GPT-4 usage based on demand. You can learn more about GPT-4 here.
For this release, there are no updates to free accounts.
ChatGPT
ChatGPT 13 Feb 2023 chatgpt

Feb 13, 2023 — Updates to ChatGPT

We’ve made several updates to ChatGPT! Here's what's new:
We’ve updated performance of the ChatGPT model on our free plan in order to serve more users.Based on user feedback, we are now defaulting Plus users to a faster version of ChatGPT, formerly known as “Turbo”. We’ll keep the previous version around for a while.We rolled out the ability to purchaseChatGPT Plusinternationally.
ChatGPT
ChatGPT 9 Feb 2023 chatgpt

Feb 9 2023 — Introducing ChatGPT Plus

As we recently announced, our Plus plan comes with early access to new, experimental features. We are beginning to roll out a way for Plus users the ability to choose between different versions of ChatGPT:
Default: the standard ChatGPT modelTurbo: optimized for speed (alpha)
Version selection is made easy with a dedicated dropdown menu at the top of the page. Depending on feedback, we may roll out this feature (or just Turbo) to all users soon.
ChatGPT
ChatGPT 30 Jan 2023 chatgpt

Jan 30, 2023 — Factuality and mathematical improvements

We’ve upgraded the ChatGPT model with improved factuality and mathematical capabilities.
ChatGPT
ChatGPT 9 Jan 2023 chatgpt

Jan 9, 2023 — Updates to ChatGPT

We're excited to announce several updates to ChatGPT! Here's what's new:
We made more improvements to the ChatGPT model! It should be generally better across a wide range of topics and has improved factuality.Stop generating: Based on your feedback, we've added the ability to stop generating ChatGPT's response
ChatGPT
ChatGPT 15 Dec 2022 chatgpt

Dec 15, 2022 — Performance updates to ChatGPT

We're excited to announce several updates to ChatGPT! Here's what's new:
General performance: Among other improvements, users will notice that ChatGPT is now less likely to refuse to answer questions.Conversation history: You’ll soon be able to view past conversations with ChatGPT, rename your saved conversations and delete the ones you don’t want to keep. We are gradually rolling out this feature.Daily limit: To ensure a high-quality experience for all ChatGPT users, we are experimenting with a daily message cap. If you’re included in this group, you’ll be presented with an option to extend your access by providing feedback to ChatGPT.
To see if you’re using the updated version, look for “ChatGPT Dec 15 Version” at the bottom of the screen.

Tracking what they’re building

Observed site activity — new pages appearing on each platform’s website, updated daily.

What is the LLM Changelog?

The LLM Changelog is a live, automated tracker that monitors release notes and documentation updates across the largest AI platforms — including OpenAI's ChatGPT, Google's Gemini, Perplexity AI, Microsoft Copilot and Google Search. Changes are crawled daily and presented in a single, searchable feed.

Why AI Platform Changes Matter for Brands

When AI models update their training data, adjust ranking signals or change how they cite sources, the brands and products they recommend can shift overnight. An API change to Gemini or a new feature in ChatGPT can alter which businesses get mentioned in millions of AI-generated responses.

Platforms We Track

We currently monitor ChatGPT release notes, OpenAI developer and model changelogs, Gemini API and app updates, Perplexity product and API changes, Microsoft 365 Copilot release notes, and Google Search Central documentation updates. New sources are added as the AI landscape evolves.

Built by reconnAI

reconnAI tracks how AI systems represent brands in their responses. We monitor mentions, sentiment and citations across ChatGPT, Gemini, Perplexity and more — helping businesses understand and improve their visibility in the age of AI search. Learn more →