The Archive

Elon Musk's tech company released the newest version of Grok on Wednesday, promising a cheaper, more efficient alternative to other powerful AI models.

Training safe Reinforcement Learning (RL) systems is inherently challenging, with no guarantee of avoiding unwanted behaviors. The most effective defenses against this are (i) transparency through explainability and (ii) alignment via human feedback. While both show promising results, no publicly available framework currently combines them. To address this, we introduce Themis, an XAI-enabled testing and evaluation framework for Reinforcement Learning from Human Feedback. Themis supports over 200 widely used environments and is easily configurable for experiments in RL, transparency, and alig...

Explanation requires ground truth: to verify an account of a system we must know its inner functioning-just what is missing where explainable AI (XAI) is most needed. Systems we can study fall into two camps. Simple, procedural one-decision trees, rule lists, sparse linear models-have a known but trivial mechanism, so explaining them tests nothing; genuinely complex ones-deep networks, real-world tasks-need XAI but have no ground-truth inner functioning, so an explanation can be plausible, confident, and wrong with no way to tell. We remove this dichotomy with a study object both genuinely co...

xAI released Grok add-in for Microsoft Word enabling document generation and formatting from notes.

Electricity markets are inherently complex systems characterised by strong nonlinearities, high-dimensional interactions, and increasing interdependence across regions. While deep neural networks (DNNs) have demonstrated strong predictive capabilities for electricity prices, their lack of interpretability limits their usefulness for understanding the underlying drivers of price formation. This paper addresses this gap by combining DNN models with explainable artificial intelligence (XAI) techniques to analyse the determinants of electricity prices across 39 European bidding zones. We employ S...

Grok models now available through Amazon Bedrock, expanding distribution channels for xAI's inference.

NAACP lawsuit says xAI uses gas turbines without permits for Grok data center.

The Justice department says the Pentagon needs xAI to keep using its unpermitted gas turbines.

xAI announced Grok Imagine Video 1.5 with improved quality and faster generation speeds.

xAI released Grok add-in for Microsoft PowerPoint enabling slide generation from outlines.

Transformer-based automatic speech recognition (ASR) models such as Whisper are highly accurate, but their predictions remain difficult to interpret. Existing explainable AI (XAI) methods often lack faithfulness and precise temporal grounding. We propose Listening with Entropy-guided Attention for Faithful explainability (LEAF-X), a model-intrinsic XAI framework for transformer-based ASR. LEAF-X combines entropy-guided attention weighting, multi-layer attention rollout, and optional causal ablations to identify low-entropy, high-impact heads and layers, producing sparse token-to-frame attribu...

xAI launched plugin marketplace for Grok Build enabling third-party extensions.

A former xAI engineer is suing the company and SpaceX, alleging he was fired for raising AI safety concerns about Grok days before SpaceX's historic IPO.

grok-imagine-video-1.5-preview image-to-video model now available via xAI API in preview.

Inside xAI: Building Grok Imagine in 3 Months, Videogen vs World Models, and why Grok Imagine is so underrated. For the first time, we do a deep dive with the guy who led it!

Grok Build 0.1 coding model available via xAI API in public beta with focus on speed.

Elon Musk is publicly reframing xAI’s massive Anthropic compute deal as short-term and cancellable, despite SpaceX’s own S-1 filing describing payments through May 2029.

xAI's Grok now integrates with Kilo Code, an open-source agentic coding platform, for SuperGrok and X Premium+ subscribers.

Elon Muks's xAI has gone all in on natural gas, while SpaceX is obsessed with orbital data centers. What happened to the "solar-electric economy" he promised?

There is a harsh truth about Elon Musk's "truth-seeking" AI chatbot Grok: It's not very good, and not many people are using it. That's the takeaway of a new Reuters report, which found that Grok barely appears in federal records of how the US government used AI last year. It's not the only sign xAI's signature chatbot is in trouble, even as Musk puts it at the heart of what could be the biggest IPO in history. Reuters reviewed more than 400 examples of government AI use where specific vendors were named. Grok or xAI, it found, appeared in only three - each of those for basic uses like documen...

Tests OpenAI, Anthropic, DeepSeek, xAI models for conflict-context failures: false atrocity equivalence, genocide denial, ethnic slur misrecognition.

The SpaceX IPO is here, and it's more than just an historic public offering that could make Elon Musk the world's first trillionaire. It also reveals more ways in which Elon Musk's companies interact and overlap with each other, shuffling money around in ways that are often difficult to keep track of. This is evident in ways that are both obvious and less so. A CTRL-F search for "Tesla" yields 87 results, xAI is mentioned 356 times, and X 267 times. Even the Boring Company (7 times) and Neuralink (3) get a few mentions. Throughout its 330 pages of rocket launches and interplanetary wishes, yo...

xAI adds Grok support to OpenCode for SuperGrok and X Premium subscribers.

SpaceX's IPO filing reveals xAI lost $6.4 billion in 2025 while planning a massive Grok expansion — offering the first public look at Elon Musk's AI financials and more details about his ambitions.

Elon Muks's xAI said it will buy $2.8 billion worth of natural gas turbines over the next three years, according to SpaceX's IPO filing.

I was reading [SpaceX's prospectus](https://www.sec.gov/Archives/edgar/data/1181412/000162828026036936/spaceexplorationtechnologi.htm) which just dropped. Seems like it has some additional info about the Anthropic-xAI deal on p. 13. Anthropic is paying SpaceX 1.25B/mo for some unspecified amount of capacity between Colossus 1 and 2. Colossus 1 we've previously known about, Colossus 2 seems new. Well, this seems like a much bigger deal than was originally reported 2 weeks ago? 1.25B/mo is 15B/year, which is almost half of Anthropic's ARR even after it exploded in Q1 this year. Also seems lik...

Elon Musk's xAI surprised the AI world when it made a deal to sell compute to Anthropic. Now we know how much it's worth.

Framework for uncertainty-aware XAI via Bayesian neural networks and explanation distributions; application to power quality classification.

xAI integrates Grok into OpenClaw, an open-source local-first agent framework supporting X Premium subscriptions.