Techmeme
December 21, 2025, 6:40 PM

Top News

Joe Rivano Barros / Mission Local:
Waymo says it temporarily suspended its ride-hailing service in San Francisco during a citywide blackout, as downed traffic lights appeared to halt its vehicles  —  Waymo said Saturday that it was stopping service across San Francisco after numerous online videos showed its autonomous vehicles …
@metr_evals:
METR: Claude Opus 4.5 has a 50% task completion time horizon of about 4 hours and 49 minutes, more than double that of Claude Opus 4 released earlier this year  —  We estimate that, on our tasks, Claude Opus 4.5 has a 50%-time horizon of around 4 hrs 49 mins (95% confidence interval of 1 hr 49 mins to 20 hrs 25 mins). While we're still working through evaluations for other recent models, this is our highest published time horizon to date. [image]
John Sakellariadis / Politico:
Sources: DHS is investigating whether 6 staffers misled CISA's acting director into taking a polygraph that he failed, compounding instability at the agency  —  The incident this July and the subsequent fallout — which has not been reported before — have angered career staff …
Sri Muppidi / The Information:
Source: OpenAI's share of revenue after the cost of running AI models for paying users has jumped to ~70% in October, up from ~52% at the end of 2024  —  As OpenAI discusses raising an unprecedented investment round of up to $100 billion, it can crow about some key improvements to how it runs its business.
More: Fortune
Mariella Moon / Engadget:
Google says it needs more time to upgrade Assistant to Gemini on most Android devices; Google previously planned to complete the transition by the end of 2025  —  The transition from Assistant to Gemini will continue into 2026.  —  Google wanted to remove Assistant from most Android phones …
Business Insider:
Google and Apple advise employees on H-1B and other visas not to travel outside the US due to processing delays, following new social media screening rules  —  - Google and Apple are advising some employees with visas not to travel outside the US, per memos viewed by Business Insider.
Bloomberg:
Chinese AI chipmaker Moore Threads announces a new generation of chips slated for mass production from 2026, just weeks after its blockbuster IPO in China  —  Moore Threads Technology Co. introduced a new generation of chips aimed at reducing artificial-intelligence developers' dependence …
Jessica Mathews / Fortune:
A look at military tech startup Shield AI, recently valued at $5.6B, and its new CEO Gary Steele, who aims to grow annual revenue from $300M to $1B by 2028  —  The X-BAT will be flown using Shield AI's autonomous software, Hivemind.COURTESLY OF SHIELD AI  —  There are plenty …

Sponsor Posts

Subquadratic:
Subquadratic: the LLM built for 12M-token reasoning  —  SubQ can reason across entire codebases and document sets in one pass with no RAG workarounds.  Read how SubQ 1.1 Small holds near-perfect retrieval out to 12M tokens.
Equals:
Stop vibe coding analytics  —  Equals AI turns questions about your business into auditable spreadsheet models and dashboards.  Build once, iterate for years.
Zoho:
Turn every support session into a data point that works for you  —  Most support teams close a session and move on.  The issue gets resolved, the ticket gets marked done, and whatever insight that session generated quietly disappears.
IDrive:
Protecting your Cloud Applications Data  —  Backing up Office 365, Google Workspace, Dropbox & Salesforce data is critical to preventing data loss or corruption, complying with laws and avoiding critical downtime in case of a disaster.

Featured Podcasts

Access:
This AI will push back if you're rude to it
A show about the tech industry's inside conversation, hosted by tech reporter Alex Heath and founder whisperer Ellis Hamburger.
Subscribe to Access.
Big Technology Podcast:
AI Pioneer Jürgen Schmidhuber: AI Already Feels Pain, Loves, and Is Self-Aware
The Big Technology Podcast takes you behind the scenes in the tech world featuring interviews with plugged-in insiders and outside agitators.
Subscribe to Big Technology Podcast.
Channels with Peter Kafka:
Inside Podcasting's Fight Over Netflix, YouTube, and Creator Control
Media and tech aren't just intersecting - they're fully intertwined. To understand how those worlds work, Peter Kafka talks to industry leaders, upstarts and observers.
Subscribe to Channels with Peter Kafka.
Uncapped with Jack Altman:
Sam Blond from Monaco
Conversations with people I admire about things I'm genuinely interested in.
Subscribe to Uncapped with Jack Altman.
Training Data:
Anthropic's Katelyn Lesse & Angela Jiang: Building an Ecosystem, not a Walled Garden
Sequoia Capital partners host conversations with leading AI builders and researchers to develop a deeper understanding of the evolving technologies and their implications.
Subscribe to Training Data.
Tools and Weapons with Brad Smith:
Connecting the Unconnected: Doreen Bogdan-Martin
Microsoft Vice Chair and President Brad Smith speaks with leaders in government, business, and culture to explore the most critical challenges at the intersection of technology and society.
Subscribe to Tools and Weapons with Brad Smith.
 

About This Page

This is a Techmeme archive page. It shows how the site appeared at 6:40 PM ET, December 21, 2025.

The most current version of the site as always is available at our home page. To view an earlier snapshot click here and then modify the date indicated.

More News

Earlier Picks

April Roach / CNBC:
Isabelle Bousquette / Wall Street Journal:
OpenAI: