GitHub said in a blog post today that it is moving Copilot to usage-based billing starting June 1. Base subscription prices will remain the same but premium requests will be replaced with monthly AI Credits that are consumed based on token usage.

"Instead of counting premium requests, every Copilot plan will include a monthly allotment of GitHub AI Credits, with the option for paid plans to purchase additional usage," the platform said. "Usage will be calculated based on token consumption, including input, output, and cached tokens, using the listed API rates for each model. This change aligns Copilot pricing with actual usage and is an important step toward a sustainable, reliable Copilot business and experience for all users."

Documentation for individuals, businesses and enterprises, and an FAQ can be found at their respective links.

California's proposed billionaire tax appears headed for the November ballot after backers said they gathered more than 1.5 million signatures, well above the threshold needed to qualify. SF Standard reports: Backers of the initiative announced this weekend that more than 1.5 million people signed a petition to bring the one-time, 5% wealth tax to a statewide vote come November. That's well beyond the 875,000 names needed to qualify the measure, and likely sufficient to account for illegible or invalid signatures. The Service Employees International Union United Healthcare Workers West, a union representing more than 120,000 healthcare workers, pitched the tax to make up for federal spending cuts that threaten to shutter hospitals(opens in new tab) and kick millions of people off medical insurance.

Proponents of California's wealth tax estimate it would raise $100 billion in one-time revenue, even if some billionaires leave because of the measure. The nonpartisan California Legislative Analyst's Office forecasts tens of billions in upfront revenue, but cautioned that the tax could cost hundreds of millions or more a year if some billionaires move out of state. The proposal, which needs a simple majority to pass, would apply to assets of people with net worth of $1 billion or more who lived in California as of Jan. 1 this year. That means it would affect about 200 people, according to the SEIU-UHW.

An anonymous reader quotes a report from VentureBeat: The whale has resurfaced. DeepSeek, the Chinese AI startup offshoot of High-Flyer Capital Management quantitative analysis firm, became a near-overnight sensation globally in January 2025 with the release of its open source R1 model that matched proprietary U.S. giants. It's been an epoch in AI since then, and while DeepSeek has released several updates to that model and its other V3 series, the international AI and business community has been largely waiting with baited breath for the follow-up to the R1 moment.

Now it's arrived with last night's release of DeepSeek-V4, a 1.6-trillion-parameter Mixture-of-Experts (MoE) model available free under commercially-friendly open source MIT License, which nears -- and on some benchmarks, surpasses -- the performance of the world's most advanced closed-source systems at approximately 1/6th the cost over the application programming interface (API).

This release -- which DeepSeek AI researcher Deli Chen described on X as a "labor of love" 484 days after the launch of V3 -- is being hailed as the "second DeepSeek moment." As Chen noted in his post, "AGI belongs to everyone". It's available now on AI code sharing community Hugging Face and through DeepSeek's API. The new DeepSeek-V4-Pro model delivers "near-frontier performance" at a much lower price, costing $5.22 for 1 million input and 1 million output tokens compared with $35 for GPT-5.5 and $30 for Claude Opus 4.7. That makes it roughly 1/7th the cost of GPT-5.5 and 1/6th the cost of Claude Opus 4.7, reinforcing VentureBeat's point that DeepSeek is "compressing advanced model economics into a much lower band."

While GPT-5.5 and Claude Opus 4.7 still lead on most benchmarks, DeepSeek-V4-Pro gets close enough that its lower cost could "force a major rethink of the economics of advanced AI deployment."

"There are about 70% more bookstores now than there were six years ago in the United States," says Andy Hunter, the founder/CEO of Bookshop.org. Fast Company checks in on his site, which gives over 80% of its profit margin to independent bookstores, structuring itself as a B Corporation (a for-profit company certified for its social-impact) while providing an alternative to Amazon and other online booksellers: Hunter created Bookshop.org in January 2020 to help independent bookstores survive by utilizing e-commerce... "There were over 5,000 bookstores in the American Booksellers Association in 1995, which is one year after Amazon launched. By 2019, that had gone down to 1,889, so more than half of them disappeared." He says he never could have predicted how the pandemic would accelerate his company's growth... "All these stores that had been trying to get around e-commerce or never really launching or building their website, they had to sell online. That was the only way they could survive during the pandemic...."

"Our goal is to help independent local bookstores get their fair share of online sales, which would end up being maybe 10% of Amazon's market share," he says. "And right now we're at about 2%, so we have a long way to go. But a lot of people didn't even think we could ever get 1%...." Bookshop.org has given almost $47 million back to local bookstores. For Hunter, it's not just about the money but changing the way society thinks. He's delighted that many big organizations no longer use Amazon affiliate links, choosing to send people his way instead. "People have absorbed the message that they should support independent bookstores when they buy books," he says.

Public stock exchanges "appear to be warming to climate tech startups," reports TechCrunch. "Or at least some of them." This week, nuclear startup X-energy went public, raising $1 billion in an upsized share offering that appears to have delivered a windfall for its investors, including Amazon [and Google]. Retail investors apparently can't get enough, with the stock popping 25% in its first hour of trading. Also this week, geothermal startup Fervo said it filed for an initial public offering. The size of the Fervo IPO has yet to be disclosed, but private investors have valued the company at around $3 billion, according to PitchBook.

The move to go public aligns with what investors told TechCrunch at the end of last year. After years of tepid attitudes toward climate tech companies, they expected public markets to start welcoming energy-related startups. Nearly every investor that weighed in on the question said the startups with the best chances of going public specialize in either nuclear fission or enhanced geothermal. Fervo, specifically, was mentioned several times. Thank data centers for that. The AI craze has taken a trend of rising demand for electricity and made it sexy and salable.