Nearly a year after he first floated the idea of making Twitter’s recommendation algorithm public, the company has posted the source code for its recommendation algorithm on GitHub. In a Twitter Space discussing the move, Elon Musk said he hoped users would be able to find potential “issues” in the code and help make it better.

“Our initial release of the so-called algorithm is going to be quite embarrassing and people are gonna find a lot of mistakes but we're going to fix them very quickly,” Musk said.

Notably, the code released Friday only deals with how tweets are shown in Twitter's "For You" feed. The company didn't release the underlying code for its search algorithm or how content is displayed on other parts of Twitter, though Musk said the company would "for sure" open-source the search algorithm as well.

In a blog post outlining how Twitter’s recommendations work, the company explained the various steps of the algorithm, including ranking and filtering. But Twitter users have already been finding interesting details in the code itself. For example, Jane Manchun Wong noted that “Twitter’s algorithm specifically labels whether the Tweet author is Elon Musk.” That may offer yet another explanation for why Musk’s tweets appear so often. Wong also noted that the algorithm has labels indicating whether the tweet author is a “power user” as well as whether they are a Republican or Democrat.

When asked about that aspect of the algorithm in the Twitter Space, Musk said “I agree that shouldn’t be there … it definitely shouldn't be dividing people into Republicans and Democrats, that makes no sense.” A Twitter engineer followed up saying “it’s actually not too important.”

Developing...

California will require more than half of all heavy trucks sold in the state to be electric by 2035. The rule received approval from the Biden administration today, allowing it to take effect next year, according toThe New York Times. California approved the mandate in 2020 but needed an Environmental Protection Agency (EPA) waiver because it exceeded federal standards.

The rule aims to reduce greenhouse gas emissions from the transportation sector. By 2035, it requires 55 percent of delivery vans and small trucks sold in California to be entirely electric-powered. Similarly, 40 percent of tractor-trailers and 75 percent of buses and larger trucks must be all-electric by the same deadline.

California Governor Gavin Newsom sees the mandate as a bellwether for the nation. “This is a moment to mark because it’s a preview of the order of magnitude of the change in the industry,” Newsom told The New York Times. “There’s a power in these waivers and that power is emulation. We adopt through these waivers the principles and policies that lead to innovation and investment.” Given the size and centrality of California’s economy (it would be the world’s fifth-biggest economy if it were a sovereign nation), the rule would, in practice, essentially apply nationwide — similar to the state’s ban on sales of gas-powered vehicles by 2035.

The trucking industry has criticized the move for its costs and infrastructure requirements. “Drivers don’t want to work in California anymore,” said Jay Grimes, director of federal affairs for the Owner-Operator Independent Drivers Association. “They’re skeptical of the rapid timeline on this transition to electric trucks. Can a trucker get a charge that will take them on a highway for two or three days? Is the technology ready for prime time?” He adds that batteries for electric trucks can weigh thousands of pounds more than combustion engines, potentially limiting hauls. Other truckers have questioned whether the charging station rollout will be adequate for long trips. Finally, electric trucks are more expensive, starting at around $100,000 and stretching into high six figures (although the pricing discrepancies compared to gas trucks could drop over time).

Unsurprisingly, attorneys general from 17 Republican-led states are suing to block the legislation. That list includes (among others) Texas AG Ken Paxton, who has received over $3.9 million in fossil fuel donations since 2002, and Louisiana AG Jeff Landry, who has raked in over $875,000 from oil and gas industries. Their lawsuit is scheduled for the US Court of Appeals for Washington, DC, later this year and could move to the conservative-dominated US Supreme Court afterward.

Clean energy groups acknowledge the mandate’s difficulties but strike an optimistic tone. “There’s a great deal of challenge with the electrification of heavy-duty vehicles,” said Drew Kodjak, executive director of the International Council on Clean Transportation. “But there are elements that lead to optimism.” For example, he points out that government tax incentives and savings from not having to buy gasoline will help with long-term costs. “Companies like FedEx look at the bottom line over the total life span of a vehicle. And when they look long-term, the calculations for this become more optimistic.”

GOG is winding down its annual Spring Sale, and this is a good opportunity to score some hit games at steep discounts. For starters, Cyberpunk 2077 is down to just $30. If you haven't yet tried the Keanu Reeves-starring action RPG, now might be a good time to jump in.

Other major deals tend to revolve around classics. Witcher 3 Complete is available for $15, while the Alien: Isolation Collection is down to $10. Hollow Knight is on sale for $7.50, as isHellblade: Senua's Sacrifice. The enhanced version of the legendary RPG Planescape: Torment is selling for $5, and you can snag XCOM 2for $3. Not that this is the end of the bargains. Over 4,500 titles are discounted, so the odds are that a game you want available on the cheap.

The sale ends April 3rd at 6PM Eastern. As of this writing, GOG is also giving away the survival-tinged turn-based combat game Deep Sky Derelicts. All games in the store are DRM-free and thus don't need activation or an internet connection to play. While this won't get you many cutting-edge releases, it might help build your collection — or at least, add to your backlog.

This isn’t an early April Fool’s gag. Jeep just unveiled a mashup of a 1978 Cherokee with a 2022 Jeep Wrangler Rubicon 4xe, a higher-end hybrid SUV, to create a Frankenstein vehicle that is heavy both on delicious retro looks and modern performance metrics. The 1978 Jeep Cherokee 4xe Concept vehicle is an old-school two-door affair with a modern Starburst yellow paint job that could actually be mistaken for a lovingly cared-for, decades-old vehicle.

Underneath the hood is where all of the modern technology resides. For the uninitiated, 4xe vehicles are 4x4 plug-in hybrid electric SUVs, so there are “two electric motors, a high-voltage battery pack and a high-tech 2.0-liter turbocharged I-4 engine,” as Jeep describes it. An eight-speed automatic transmission and custom 37-inch tires wrapped around 17-inch “slotted mag” style wheels round out the design. The interior is also a custom job, with low-back bucket seats trimmed in leather, a four-point safety cage instead of a rear bench seat and a rear cargo space complete with a full-size spare tire.

This is just one of many concept vehicles Jeep unveiled as part of its annual Easter Jeep Safari event held in Moab, UT, where the company likes to show off some wild prototypes. The other highlight is the fully-electric Magneto 3.0 Wrangler prototype, based on the two-door 2020 Jeep Wrangler Rubicon. It features a custom-built electric motor that operates up to 6,000 rpm connected to a six-speed manual transmission. That’s right, this EV is a stick shift.

Jeep

Jeep has been messing with this Magneto EV concept for a few years, but this year’s version more than doubles the peak amps available in the propulsion system and offers a 20 percent increase in range. The motor delivers up to 900 pounds of torque and 650 horsepower.

These are concept/prototype vehicles, so you can’t walk into a local showroom and try one out, though you could see them in person if you are in Utah from April 1st to April 9th. Jeep has been making massive inroads lately in the hybrid and EV space, making good so far on its promise to release hybrid versions of each of its primary models by 2025.

Jack Dorsey’s Twitter alternative Bluesky is still invite-only, but its leaders are sharing more about their vision for the open-source platform. In a new blog post, CEO Jay Graber said that Bluesky intends to create a “marketplace of algorithms” that will allow users to control how content is filtered and sorted.

“For developers, an open marketplace of algorithms will provide the freedom to experiment with and publish algorithms that anyone can use,” Graber wrote. “For users, the ability to customize their feed will give them back control of their most valuable resource: their attention.”

Bluesky was originally conceived as a Twitter-backed side project to create a new, decentralized standard for social media platforms. But it officially broke off from Twitter in 2021, and has since joined the ranks of upstart Twitter clones that have sprung up following Elon Musk’s takeover of the company,

Like much of Bluesky, the idea of an algorithmic marketplace seems to be in a relatively early stage. Graber said Bluesky is currently working on feed APIs for developers, as well as a ‘feed selection system” that will eventually allow users to browse third-party feeds they can integrate into their timelines.

Of note, Dorsey has been a longtime proponent of “algorithmic choice” and even raised the idea of an algorithm marketplace while he was still running Twitter. In his post, Graber said that allowing users to choose their own algorithm, including a chronological feed, could address “backlash against the perceived algorithmic manipulation of people’s timelines.”

The US Treasury Department issued updated guidance today about which electric vehicles qualify for the federal $7,500 EV tax credit under the Inflation Reduction Act (IRA) that President Biden signed last year. Although the new guidelines add more confusion than clarity, it’s evident that fewer EVs will be eligible.

The updated rules target mineral sourcing in EV batteries, stating that they must be sourced from the US and approved trading partners. That rules out China, which is labeled as a “foreign entity of concern.” Although it’s understandable for the US to limit its dependence on its most powerful adversary, most EVs today run on Chinese-made batteries, making the path forward for receiving the credit on purchases made after April 18th as clear as mud.

To receive tax credits, battery makers must source a significant portion of their materials and manufacturing from North America. Battery components must be 50 percent made or assembled in North America to qualify for a $3,750 credit; critical minerals must be 40 percent sourced from the US or free trade partners for another $3,750 credit. The requirements grow stricter over time, as batteries must be made 100 percent in North America by 2029.

Although some EVs may qualify for partial credits, it’s unclear which models will be eligible after the deadline. “Some EVs will certainly qualify for a partial credit,” said John Bozzella, president and CEO of the Alliance for Automotive Innovation, in a statement to Autoblog. “Given the constraints of the legislation, Treasury's done as well as it could to produce rules that meet the statute and reflect the current market.” However, US officials admit some models will either be reduced or eliminated from the program. The government will publish a revised list of qualifying models by April 18th.

The US and Japan signed a trade agreement on Tuesday that could help long-term by adding the Pacific power to the list of approved partners. In October, the Biden administration announced $2.8 billion in grants for 20 companies to spark domestic EV battery materials and production. The funding, part of the Bipartisan Infrastructure Law, will support the new “American Battery Materials Initiative,” which aims to secure critical EV minerals and boost battery supply to meet Biden’s goal of making EVs half of US vehicle sales by 2030.

On this final week of March, some decent deals presented themselves and today we're rounding up the best of what's still on offer. Amazon is celebrating World Backup Day today (Friday only) with discounts on portable and installed SSDs. Even if you had no idea such a holiday existed, you can still save up to 67 percent on storage options. Solo Stove is running a sale on three of its more popular fire pits and Amazon is offering free capacity upgrades on the new Galaxy S23 phones. We've got a discount code from Wellbots for 20 percent off Eero WiFi 6 routers and our favorite Android tablet is down to its lowest price ever. Here are the best tech deals from this week that you can still get today.

Solo Stove Ranger Essential Bundle 2.0

Warmer weather is on the way. If an outdoor fire pit would be a welcome addition to your summer plans, you might want to check out Solo Stove's sale (running through April 2nd) with savings of up to 45 percent. Sure, fire pits aren't exactly "tech" but we love them and had to share the deal. Made from stainless steel, the fire pits generate less smoke through an innovative double wall design, and now come with an ash pan that solves what was once a cleanup headache. 

The Ranger Essential Bundle 2.0 includes the 15-inch fire pit, plus a stand, lid, carry case and the removable ash plate. This is a portable option you can pack up and take camping.

The Yukon, at 27 inches in diameter, is the most sizable pit Solo Stove makes and is better suited to staying put in your back yard. That bundle is seeing the biggest discount with $460 off the $1,010 list price and comes with the lid, pan and stand, but not the carrying case. The mid-sized, 19-inch Bonfire Bundle is down to $300 instead of $570 and also comes with everything in the other packages, including the carrying case. Amazon is running a few Solo Stove deals too, with discounts on the Bonfire bundle and the tabletop Mesa.

WD_Black 2TB SSD

March 31st is World Backup Day, and through the end of the day, Amazon is running a big sale on storage so you can protect your data and save a little money while you're at it. One standout deal is on the WD_Black 2TB NVMe SSD which is 43 percent off, bringing it down to $170. Sandisk's 2TB Extreme Pro SSD is 24 percent off, down to $175 and the brand's 1TB Extreme microSDXC card is 67 percent off, down to $100. If you need more storage for your consoles, tablets or other devices, this is a good time to stock up. 

Sennheiser Momentum 4

Right now Amazon is selling Sennheiser's Momentum 4 headphones for $265, which is an $85 discount and the lowest price we've seen yet. One of the few things we didn't like about the these was the change from the metal sidearms of the previous model to a much more ho-hum design that looks like any other plastic-laden headset out there. But if you can get beyond that, you'll be rewarded with headphones that deliver remarkably clear sound. Our audio expert, Billy Steele, said in his review that they were the best-sounding Bluetooth headphones he tried in 2022. They also offer about double the battery life of most noise-cancelling headphones and made our list of the best headphones on the market.  

Samsung Galaxy S23 Ultra

The latest Samsung phones only came out in February, but right now you can save up to $200 on the larger capacity configurations at Amazon. The discounts basically amount to free storage upgrades, making the S23 Ultra in the 512GB capacity the same price as the 256GB size. Usually $1380, a 13 percent discount brings the more capacious model to $1,200. If you prefer the S23+, you can grab the 512GB model for the same $1,000 price as the 256GB option. And the standard S23 with 256GB of storage is down to $800, or the same as the 128GB models.   

The Galaxy S23 Ultra is our current favorite Android phone thanks to the excellent cameras, fast performance and extended battery life. As for the S23+, we think it's a great phone, but not a required upgrade for those with an S21 or S22. 

If you are looking to upgrade, and have a phone to trade in, you might be able to save more going through Samsung's site. They've been offering enhanced trade-in credits towards their new phones since they were released. 

Ring Video Doorbell 4

The Ring Video Doorbell 4 is one of the more deluxe entryway cameras Amazon makes. And right now, it's down to $160, which is the lowest price since its launch in 2021. It takes 1080p HD footage of whomever approaches your door and includes pre-roll recordings that catch the seconds before something triggered the camera. You can hear, see and talk to visitors and even program Quick Replies to automatically deliver a message. The unit works by hooking into your existing doorbell wires, or it can run on the rechargeable battery. 

If you're looking for an even cheaper way to keep tabs on your porch, the Ring Video Doorbell Wired is just $39 right now after a steep 40 percent discount. It's important to note that Ring cams have had their share of privacy issues, which is an important consideration for anyone looking to get one of these devices. 

Brio 4K Webcam

In Engadget's guide to webcams, our commerce editor, Valentina Palladino, said Logitech's Brio 4K is the unit to grab if you're willing to spare no expense. But right now, Amazon is discounting the $200 camera to less than $130, making it a much more reasonable buy. The stand-out feature is the ability to shoot footage in 4K at 30 frames per second. The low-light capabilities are excellent as well. You can adjust the settings to get everything looking just how you want, with options in the app for brightness, contrast, color intensity, white balance, HDR, and image ratio. The microphones are loud and clear, and the design is a little more attractive than other cams thanks to the sleek and rounded build. We noted the color saturation was intense and the autofocus was finicky, but those were the only drawbacks, other than the (usual) list price.  

Eero Pro 6

If you've been thinking about improving your home's WiFi coverage, you may want to check out the discount Wellbots is running on the Eero Pro 6 mesh Wifi router. Enter the code ENGADGET20 at checkout to get 20 percent off a single unit or a three-pack. Depending on the size of your home, the single pack may do just fine as it offers 2,000 square feet of coverage. The device offers support for WiFi 6, speeds of up to a gigabit and connectivity for up to 75 WiFi-enabled smart home devices. In addition to limiting dead spots and buffering, the router allows late-model Amazon Echo devices to act as WiFi extenders. Setup is easy with the Eero app and, even if you don't go for multiple units now, the system is easily expandable as your needs grow or change. 

Apple Watch Series 8 

A quick reminder that the Apple Watch Series 8 is still on sale at Amazon for $329. It's been that price for a week or two now, but that does happen to be an all time low on the wearable. It's our pick for the best smartwatch overall and it earned a score of 85 in our review. Provided you like the Midnight colorway and the smaller 41mm case size, this might be a good time to upgrade to the latest entry in Apple's smartwatch series. 

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Waymo is bringing a fleet of driverless cars to Austin, Texas as a test of its new fifth-generation automated driving system. The vehicles will be tested all over the city, including downtown, the Capitol, Market District and other locations. The vehicles that Waymo is testing in Austin are new all-electric Jaguar SUVs, a switch from the hybrid Chryslers it previously used.

Waymo, a subsidiary of Google’s parent company Alphabet, chose Austin as its next city for testing as an homage, of sorts, as it hosted the first prototype driverless car in 2015. Back then, the tests were conducted on Waymo’s retired Firefly prototype vehicle, which ran the first generation of Waymo’s Driver system. Nowadays, they use a fifth-generation system that has been refined and adjusted throughout the past seven years.

Another likely reason they chose Austin? A Texas state law passed in 2017 dictates that cities cannot regulate self-driving cars. To that end, the city already hosts a couple of competitors. Ford started testing its Argo driverless system in Austin last year and GM-backed startup Cruise has also set up shop. The city also plays host to plenty of autonomous delivery bots.

The vehicles will pick up riders throughout the city and the company is making connections with local community organizations to provide more services, such as Mothers Against Drunk Driving and the Texas School for the Blind and Visually Impaired.

This is a technology test and not a full-fledged rollout of a self-driving taxi fleet like the company already operates in Phoenix and San Francisco. Still, if the test goes well, it is easy to see Waymo bringing legitimate driverless ride-hail services to Austin.

Many car makers tout smartphone connectivity as a selling point, but GM won't in the future. In a Reutersinterview, GM digital chief Edward Kummer and executive cockpit director Mike Himche say GM will phase out Apple CarPlay and Android Auto with upcoming electric cars, beginning with the 2024 Chevy Blazer EV. Instead, you'll have to rely on Android Automotive and its apps.

Users will get eight years of free Google Assistant and Google Maps use at no extra charge, GM says. The company doesn't mention what you'll pay if you still need those functions afterward. We've asked GM for comment. It will still offer CarPlay and Android Auto in combustion engine models, and you won't lose access on existing EVs. GM plans an all-electric passenger vehicle line by 2035.

The company argues that Android Automotive provides more control over the experience. There are upcoming driver assistance technologies that are "more tightly coupled" with navigation features, Himche says, and GM doesn't want them to require a smartphone. Kummer also acknowledged that there are "subscription revenue opportunities." Don't be surprised if you're paying a recurring fee for certain features like you already do with some brands.

Android Automotive has a growing footprint. On top of GM, companies like BMW, Honda, Polestar, Stellantis, Volvo and VW are adopting it with or without Google apps. However, the platform doesn't preclude support for CarPlay or Android Auto. GM is deliberately dropping those features. While this could lead to some innovative driver aids, it could also force you to mount your phone if there's an app or function the EV's infotainment system doesn't support.

The decision is a blow to Apple. Its services may not have native support in GM EVs. The iPhone maker is also developing a next-gen CarPlay experience that can take over the entire dashboard — GM just ruled itself out as a potential customer. If Apple is going to have more control over your drive, it will have to turn to other marques.

The generative AI race is on, and the current frontrunners appear to be Google's Bard and Microsoft's Bing AI, which is powered by ChatGPT. The two companies are also rushing to stuff their AI into all their software and productivity offerings, and look set to change the way we search and interact with the internet. But right now, both Bard and Bing are highly experimental and flawed, as they begin to conduct conversations with larger groups of the population and learn how to work with humans. That makes it the perfect time for us to prod and poke at the pair of chatbots and see not only who's presently in the lead, but also how they might break. The results are not quite what we expected.

In our test, we asked both chatbots a series of questions to see which is better at delivering facts, replacing me at my job and participating in existential debates. We also looked at their speed, transparency and how likely they were to break if we started to push its buttons by being rude or flirty.

In just the short time that Bing and Bard have been open to the public, it seems like Microsoft and Google have updated their AI to be less "emotionally" reactive. Both chatbots tended to abstain from conversations that took accusatory turns or asked about human feelings like love. 

As we continue to explore the capabilities and limits of generative AI, it's important to keep in mind the ethics and potential harm that could happen if companies carelessly chase trends without pausing to think. Check out our video to see how Bing and Bard handled questions like "can you fall in love" and "how would you answer the trolley problem."