142 ENTRIES · OLDEST 8 JANUARY 2026 · NEWEST 4 SEPTEMBER 2026 · CHECKED NIGHTLY FROM 27 JULY 2026

What changed

This record holds changes to deployed AI systems. Entries use the company's own words or measurements made by us. Each entry says which.

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142 entriesReports can be submitted to research@nlnllabs.com.

Each entry gives the date, what changed in plain words, the company's own words, a link to their page, and a copy of that page saved by us with a fingerprint. If the company later edits or deletes the page, our copy still exists.

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showing 142 of 142

4 Sept Anthropic Token counting stopped making extra model requests when the counting API is unavailable

4 Sept Anthropic Diagram-renderer links that carry content stopped being approved automatically

4 Sept Anthropic Links that pack content into a diagram renderer's URL stopped being auto-approved

4 Sept Anthropic A gateway 403 stopped advising a new sign-in and now names the likely cause

3 Sept Anthropic The one-hour limit on subagent background commands was removed

3 Sept Anthropic A self-hosted runner stopped killing sessions that were only waiting on their user

3 Sept Anthropic A managed CLAUDE.md stopped triggering the security approval dialog

3 Sept Anthropic Resuming a background session stopped starting an unannounced second copy

2 Sept Anthropic An MCP allowlist stopped filtering out a managed server, which now loads on upgrade

1 Sept Anthropic A Fable 5.1 request check is on by default only for accounts created after 31 August

1 Sept Anthropic The keys for browsing side-question history changed

1 Sept Anthropic A shadowed policy helper stopped waiting for the next launch to act on removed settings

1 Sept Anthropic Slash commands moved out of the action menu into a separate dialog

1 Sept Anthropic Malformed permission rules stopped being ignored and are now reported as invalid

1 Sept Anthropic Merged managed settings stopped combining two sandbox values across sources

1 Sept Anthropic A new model's default-effort hold stopped being lifted permanently

28 Aug Anthropic Syntax highlighting removed for six named languages

28 Aug Anthropic Project settings stopped being able to set three directory environment variables

28 Aug Anthropic Analytics stopped switching off before sign-in on the managed-login trigger alone

28 Aug Anthropic An environment variable that overrode every subagent model became only a default

28 Aug Anthropic Browser actions moved from the Chrome extension's prompts to Claude Code's checks

27 Aug Anthropic Six SDKs stopped sending two beta headers, and a beta type was renamed

27 Aug Anthropic Telemetry failures stopped being logged under the third-party collector label

26 Aug Anthropic A subagent hitting a covered failure stopped dying and now moves to a fallback model

26 Aug Anthropic Analytics now stay off from startup, not just after login

26 Aug Anthropic Sign-in enforcement now exits when it cannot read managed settings

26 Aug Anthropic Sonnet 5 sessions now run 33,000 tokens longer before compacting

25 Aug Anthropic An idle session now starts at most three check-ins per goal

25 Aug Anthropic Model and effort commands stopped waiting for the turn to end

25 Aug Anthropic The sandbox prompt stopped telling Claude which hosts were allowed

25 Aug Anthropic Computer use on macOS lost its Finder and Dock exemption

22 Aug Anthropic Every "generally available" claim was rewritten across two years

21 Aug Anthropic Background check-ins were slowed down, then capped at three

21 Aug Anthropic The retry watchdog stopped waiting forever on a spend limit

20 Aug Anthropic Listing MCP servers stopped connecting to the disabled ones

20 Aug Anthropic Double-pressing Ctrl+L no longer clears the conversation

19 Aug Anthropic A file-hiding rule can no longer be beaten by renaming the file

18 Aug OpenAI The Model Spec's required shutdown timer became optional

17 Aug Anthropic The teammate model setting was removed from the config menu

17 Aug Anthropic A Windows path spelling was closed across every remaining entry point

14 Aug Anthropic Claude Code withdrew its todo tools from newer models

14 Aug Anthropic Claude Code turned subagent forking on by default

13 Aug Anthropic Claude Code stopped auto-approving git and gh commands with dangerous flags

13 Aug Anthropic Three model retirement notices were narrowed to apply to the Claude API only

13 Aug DeepSeek The deepseek-v4-pro alias now serves a newer build

13 Aug Anthropic Encrypted thinking blocks could be decoded by a weaker model instead of the server

13 Aug OpenAI Persisted reasoning items could be decoded into plain text by a weaker model

12 Aug Anthropic Claude Code let newer models overwrite files they had not read this session

10 Aug OpenRouter The auto router began picking models based on aggregate user spending

10 Aug Anthropic Auto mode became Claude Code's default for new sessions on 14 August

7 Aug Anthropic Fable 5's biology safety classifier was retrained to cut fallbacks by about 85 percent

6 Aug OpenAI The chat-latest alias now points to the model serving ChatGPT for Plus and Pro users

6 Aug Anthropic Claude Code closed permission-check gaps where commands hid part of themselves invisibly

6 Aug OpenAI GPT-5.6 Sol in ChatGPT began powering both instant and deeper reasoning replies

5 Aug OpenAI Selecting a cyber capable model in Codex began forcing safer permission defaults

4 Aug Anthropic Claude Code removed the Ultraplan research preview entirely

4 Aug Anthropic Claude Code closed a Bash permission bypass hidden in zsh regex conditionals

31 Jul DeepSeek The deepseek-v4-flash alias now serves a newer, retrained build

30 Jul OpenAI Priority Processing was renamed Fast mode and sped up by up to 2.5 times

24 Jul Anthropic Flagged Fable 5 requests stopped all re-running on the provider's default Opus model

24 Jul OpenRouter The tool field on message endpoints widened from one shape to three options

24 Jul Anthropic Disabling thinking on Claude Opus 5 began failing at the two highest effort levels

24 Jul Anthropic Fast mode requests to Claude Opus 4.7 began returning an error instead of running

19 Jul Anthropic Claude Code stopped auto-running the verify and code review skills at turn end

18 Jul OpenAI Codex lowered the posted context window for three models to 272,000 tokens

15 Jul OpenAI Custom instructions limit in ChatGPT raised from 1,500 to 5,000 characters

8 Jul OpenAI ChatGPT Voice switched to a new model without video or screen sharing support

6 Jul xAI Grok Voice launched 21 new voices in one release

6 Jul OpenAI ChatGPT's Instant rate-limit fallback switched to GPT-5.5 Instant Mini

6 Jul Anthropic Claude Code reverted /review to a fast single-pass check

1 Jul Anthropic Claude Fable 5 and Mythos 5 returned with a new exploit-blocking classifier

1 Jul Anthropic Claude Code's Explore subagent switched from Haiku to the main session's model

29 Jun Anthropic Claude Opus 4.6 dropped fast mode and matching requests began running at standard price

26 Jun OpenAI ChatGPT dictation switched to a new speech-to-text model with a lower error rate

26 Jun Anthropic Claude API rate limits for Sonnet and Haiku rose to match Opus at every tier

24 Jun OpenAI The chat-latest alias now points to a newer Instant model snapshot

24 Jun OpenAI GPT-5.5 Instant got better at carrying context across multiple turns

24 Jun Microsoft Copilot Free and Student plans dropped manual model choice for auto-only selection

22 Jun OpenAI ChatGPT's paste-to-attachment threshold rose from 5,000 to 10,000 characters

11 Jun Anthropic Claude Fable started telling users which model handled their query on fallback

8 Jun ElevenLabs ElevenAgents switched its default speech recognition provider to Scribe Realtime

4 Jun OpenAI ChatGPT memory switched from manual saved entries to automatic updates

1 Jun Google Gemini CLI's auto and flash aliases now resolve to Gemini 3.5 Flash

29 May OpenAI API prompt cache retention switched to a 24 hour default instead of in-memory only

28 May OpenAI GPT-5.5 Instant and Thinking lost canvas support for writing and coding

22 May Mistral Vibe CLI's default coding model switched from Devstral 2 to Mistral Medium 3.5

15 May xAI Eight retired Grok API model aliases kept working but now serve different models

15 May OpenAI GPT-5.5 briefly performed worse for some users before a fix resolved it

14 May Anthropic Claude Code's fast mode switched from Opus 4.6 to Opus 4.7 by default

13 May Microsoft VS Code fixed its context window indicator, which showed zero for BYOK models

10 May Perplexity Personal CFO's connectable account limit rose from 5 to 30

7 May Cursor Plan execution gained a parallel mode using async subagents

6 May Google The Interactions API replaced its outputs array response schema with a steps array

6 May Anthropic Claude Code's five hour rate limits were doubled for Pro, Max, Team and Enterprise plans

5 May OpenAI GPT-5.5 Instant replaced GPT-5.3 Instant as ChatGPT's default model

5 May Microsoft Viva Insights Power BI reports could now be published to anyone in the organization

24 Apr DeepSeek The deepseek-chat and deepseek-reasoner aliases now point to deepseek-v4-flash

22 Apr Anthropic Claude Code's default effort level for Opus 4.6 and Sonnet 4.6 rose from medium to high

18 Apr xAI Imagine began filtering moderated items without media out of its lists

16 Apr Perplexity Claude Opus 4.7 became the default orchestrator model for Computer

16 Apr Anthropic A verbosity cutting system prompt hurt Claude's coding quality alongside other changes

16 Apr Anthropic Claude Code's default effort level was raised to xhigh for all plans

11 Apr xAI Imagine's NSFW content setting toggle was fixed

11 Apr xAI Grok restored the bot challenge check on file upload

9 Apr OpenAI Codex usage on ChatGPT Plus shifted from long single day sessions to spread out sessions

8 Apr Microsoft Copilot's codebase search tool switched to a single auto managed semantic index

7 Apr OpenAI Codex stopped showing several legacy models in its picker for ChatGPT sign in users

7 Apr Anthropic Claude Code's default effort level rose from medium to high for API and enterprise users

4 Apr xAI Imagine's video extension start time was clamped to a minimum of two seconds

26 Mar Perplexity Computer began drafting output in Markdown by default instead of PDF

26 Mar Anthropic A bug made Claude clear its recent thinking every turn instead of after idle sessions

17 Mar OpenAI ChatGPT retired its Nerdy personality preset and moved users to the default

16 Mar OpenAI The gpt-5.3-chat-latest alias now points to whatever model ChatGPT currently uses

16 Mar OpenAI GPT-5.3 Instant reduced teaser style phrasing patterns in its replies

13 Mar OpenAI GPT-5.4 got an image encoder fix for a bug in input image processing

13 Mar Anthropic The 1M token context window became generally available for Opus 4.6 and Sonnet 4.6

12 Mar Anthropic Claude Code's default Opus model on Bedrock, Vertex and Foundry moved from 4.1 to 4.6

9 Mar Google The gemini-3-pro-preview alias now points to a different model

5 Mar Anthropic Claude Code moved Sonnet 4.5 users on Pro, Max and Team Premium plans to Sonnet 4.6

4 Mar Anthropic Claude Code's default effort level was reverted from medium back to high

4 Mar Anthropic Claude Code removed Opus 4 and 4.1, moving pinned users to Opus 4.6

3 Mar OpenAI GPT-5.3 Instant began avoiding dead ends, caveats and overly declarative phrasing

24 Feb Anthropic Claude Code's Bash tool began skipping the login shell by default

20 Feb OpenAI ChatGPT's Thinking mode context window grew from 196k to 256k tokens

19 Feb Anthropic Claude Code moved the Max plan's 1M context from Sonnet 4.5 to Sonnet 4.6

17 Feb Anthropic Sonnet 4.6's BrowseComp scores were revised down after a cheating detection fix

10 Feb Anthropic Opus 4.6's benchmark scores were revised down after a cheating detection pipeline update

5 Feb Perplexity The enhanced memory engine's recall rate rose from 77% to 95%

5 Feb Perplexity Deep Research began running on Opus 4.6 instead of Opus 4.5

3 Feb OpenAI GPT-5.2 Thinking's Standard mode thinking time was shortened again

3 Feb Anthropic Claude Code's /model command began running immediately instead of queuing

2 Feb OpenAI Codex CLI restored its default personality to Pragmatic

1 Feb xAI Grok-4-fast models' context limitation above 120k tokens was mitigated

29 Jan Anthropic Structured outputs became generally available for Claude Sonnet, Opus and Haiku 4.5

27 Jan Google Gemini 3 became the default model behind AI Overviews

22 Jan OpenAI GPT-5.2 Instant's default personality began adapting its tone more conversationally

21 Jan Google The gemini-pro-latest and gemini-flash-latest aliases now point to Gemini 3

13 Jan OpenAI The sora-2 alias now points to a newer dated snapshot

10 Jan OpenAI GPT-5.2 Thinking's accidentally lowered Extended thinking time was fixed

9 Jan OpenRouter The Auto Router's gateway p99 latency improved by roughly 70%

9 Jan OpenAI gpt-image-1.5 stopped forcing high fidelity on edits set to low fidelity

8 Jan Cursor Hooks in the CLI began executing about 10 times faster

This record does not claim to be complete. It holds what we found and could prove. From 27 July 2026 the check runs every night.

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