General Motors has just announced its latest and likely final piece in what now appears to be a three-pronged cell-chemistry strategy to power GM’s lineup of a dozen EVs through the end of the decade and beyond.
GM has stated today it will build low-cost lithium iron phosphate (LFP) battery cells in Spring Hill, Tennessee, starting in late 2027. Conversion of cell lines to produce that chemistry will begin later this year. The cell plant at the Spring Hill complex is owned and operated by Ultium Cells, GM’s joint-venture battery company with LG Energy Solution. A GM assembly plant in the same complex builds the Cadillac Lyriq and Acura ZDX electric SUVs.
Under Kurt Kelty, GM vice president of battery, propulsion, and sustainability, the company has diversified from its previous strategy of “one cell for all EVs.” Kelty was hired in February 2024 after stints at Tesla and Panasonic, and is widely respected in the industry.
The LFP cells made by Ultium are expected to be used in the updated 2026 Chevrolet Bolt EV, which GM should reveal within two to three months. It will go into production in a Kansas plant before the end this year. For its first two years, it will have to use LFP cells imported from another LG plant—potentially one in South Korea. Those imports let GM get inexpensive iron-phosphate batteries onto US roads a full three years before its next cell chemistry, called LMR, which it says costs no more than LFP, but has higher energy density.
Still, converting a plant—at an unspecified cost—to build LFP cells suggests they will be used in the lineup for a while.
LMR’s Future Promise
Thus far, all GM EVs after the 2017-2023 Chevrolet Bolt EV have used nickel-manganese-cobalt-aluminum (NMCA) cells. Those hold the most energy in a given volume, but are also priciest due to their nickel and cobalt content. Delays in production of the Ultium modules holding those cells pushed out deliveries of GM’s EV lineup by 12 to 18 months, from late 2022 to early 2024. (GM EV sales have risen steadily for three quarters, suggesting those troubles might be in the past.)
This May, Ultium announced a second cell chemistry, which it calls “lithium manganese-rich” or LMR. It claims the LMR chemistry provides one-third greater energy density than the same volume of lithium iron-phosphate (LFP) cells—at a comparable cell cost—and will cut the cost of its largest EV trucks and SUVs. Those vehicles from Cadillac, Chevrolet, and GMC use gargantuan battery packs of 109 to 205 kilowatt-hours.
The first LMR cells will come off a pilot line in 2027; full volume production is slated for 2028 at a plant Ultium hasn’t disclosed. With Spring Hill now set to produce LFP cells, it seems likely LMR cells will come from the other Ultium Cells plant now in production—in Warren, Ohio.
Compact Chemistry
Adding lithium-iron-phosphate rounds out the suite of chemistries GM is likely to use in its EVs from this year through the early 2030s. That applies, at least, to those produced outside China; the various models it builds in China have long included LFP chemistries, the dominant chemistry in that country.
Much of the intellectual property around LFP chemistries is owned by Chinese firms, which has caused trouble for Ford as it tries to add LFP cells for future EV models. A GM spokesperson told WIRED that no intellectual property for the LFP cells it will produce with partner LG Energy Solution is owned by any Chinese entity.
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![Anthropic’s Mythos AI Reportedly Hacked the NSA’s Most Sensitive Systems ‘in Hours’
When Anthropic first disclosed Mythos in April, it sent an anxious shockwave through much of the cybersecurity sector. The new AI model was allegedly so ruthlessly effective at finding and exploiting security vulnerabilities in existing software that the company said it was holding off on a public release and would only grant access to a small group of early testers, including the U.S. National Security Agency (NSA). Another wave of fear reverberated this week after the NSA reportedly discovered multiple vulnerabilities within its own cybersecurity systems during its tests with Mythos. If that agency—which supposedly boasts the most impenetrable cyberdefenses in the world—can be hacked by Mythos, what hope does the rest of the world’s cybersecurity infrastructure have? This latest round of panic began with what seems to have been something of a game of telephone: Someone says one thing, which gets repeated by another, and another after that, and along that chain of communication, the original statement is distorted. Last week, The Economist reported that during a June 11 hearing before the Senate Committee on Banking, Housing, and Urban Affairs, Democratic Senator Mark Warner of Virginia said that Mythos had broken into “almost all of [the NSA’s] classified systems, not in weeks, but in hours.” Warner said he’d received that information from the head of the NSA himself, General Joshua Rudd, who also leads the Pentagon’s Cyber Command division. On Monday, a coalition of intelligence agencies—including the NSA and its counterparts in Canada, the U.K., Australia, and New Zealand— issued an unusually public warning that the risk that AI now poses for cybersecurity warrants a “whole-of-society response.”
The Economist’s report was seen by some as evidence that the worst fears about Mythos were true, a reaction that was undoubtedly fueled also by the aura of power and mystery that has coalesced around the model in recent months. That aura has arguably been a boon for Anthropic, which recently usurped OpenAI as the most valuable startup in the world and is preparing for what’s expected to be a historic IPO.
But it’s also been a contributing factor in its latest skirmish with the Trump administration, which ordered the company earlier this month to restrict access for all foreign nationals to Fable 5, a “Mythos-class” model that had recently been made publicly available and which was built with safeguards that to some users were annoyingly stringent. Citing national security concerns, the administration invoked an obscure piece of export control legislation, a move that, according to some legal experts, is spurious. Many cybersecurity experts, meanwhile, argued that the ban would hamstring U.S. cybersecurity defenses and give adversaries like China the upper hand. That argument was seemingly vindicated by a Tuesday report from the New York Times which said that Trump’s ban—which also targeted another model called Mythos 5, which had only been made available to a small group of organizations—had put the kibosh on the NSA’s internal tests with Mythos, and that the administration was now working with Anthropic to reinstate the agency’s access for limited purposes related to national security. The NSA did not immediately respond to Gizmodo’s request for comment.
That same report from the Times also clarified that the NSA’s internal tests with Mythos were less apocalyptic than online rumors might suggest. According to federal officials cited in the report, the tests were carried out in a digital environment so robustly controlled that it’s very unlikely any hacker or foreign intelligence agency could replicate them. The officials also told the Times that even though Mythos was able to identify cybersecurity vulnerabilities, it didn’t actually exploit them. The author of the report in The Economist—the one that had been the initial cause of all the worry—has also admitted that his portrayal of the NSA’s tests with Mythos had been misleading. The tests “surely [involved] using Mythos alongside other tools under very particular conditions,” he wrote in a X post on Sunday. “I quoted [Senator Warner] to give a sense of Mythos’ potency. But it was a mistake not to have added caveats.” #Anthropics #Mythos #Reportedly #Hacked #NSAs #Sensitive #Systems #HoursAI,Anthropic,Mythos,NSA,Trump,White House](https://i1.wp.com/gizmodo.com/app/uploads/2026/06/GeneralJoshuaRudd-1280x853.jpg?ssl=1 "Anthropic’s Mythos AI Reportedly Hacked the NSA’s Most Sensitive Systems ‘in Hours’
When Anthropic first disclosed Mythos in April, it sent an anxious shockwave through much of the cybersecurity sector. The new AI model was allegedly so ruthlessly effective at finding and exploiting security vulnerabilities in existing software that the company said it was holding off on a public release and would only grant access to a small group of early testers, including the U.S. National Security Agency (NSA). Another wave of fear reverberated this week after the NSA reportedly discovered multiple vulnerabilities within its own cybersecurity systems during its tests with Mythos. If that agency—which supposedly boasts the most impenetrable cyberdefenses in the world—can be hacked by Mythos, what hope does the rest of the world’s cybersecurity infrastructure have? This latest round of panic began with what seems to have been something of a game of telephone: Someone says one thing, which gets repeated by another, and another after that, and along that chain of communication, the original statement is distorted. Last week, The Economist reported that during a June 11 hearing before the Senate Committee on Banking, Housing, and Urban Affairs, Democratic Senator Mark Warner of Virginia said that Mythos had broken into “almost all of [the NSA’s] classified systems, not in weeks, but in hours.” Warner said he’d received that information from the head of the NSA himself, General Joshua Rudd, who also leads the Pentagon’s Cyber Command division. On Monday, a coalition of intelligence agencies—including the NSA and its counterparts in Canada, the U.K., Australia, and New Zealand— issued an unusually public warning that the risk that AI now poses for cybersecurity warrants a “whole-of-society response.”
The Economist’s report was seen by some as evidence that the worst fears about Mythos were true, a reaction that was undoubtedly fueled also by the aura of power and mystery that has coalesced around the model in recent months. That aura has arguably been a boon for Anthropic, which recently usurped OpenAI as the most valuable startup in the world and is preparing for what’s expected to be a historic IPO.
But it’s also been a contributing factor in its latest skirmish with the Trump administration, which ordered the company earlier this month to restrict access for all foreign nationals to Fable 5, a “Mythos-class” model that had recently been made publicly available and which was built with safeguards that to some users were annoyingly stringent. Citing national security concerns, the administration invoked an obscure piece of export control legislation, a move that, according to some legal experts, is spurious. Many cybersecurity experts, meanwhile, argued that the ban would hamstring U.S. cybersecurity defenses and give adversaries like China the upper hand. That argument was seemingly vindicated by a Tuesday report from the New York Times which said that Trump’s ban—which also targeted another model called Mythos 5, which had only been made available to a small group of organizations—had put the kibosh on the NSA’s internal tests with Mythos, and that the administration was now working with Anthropic to reinstate the agency’s access for limited purposes related to national security. The NSA did not immediately respond to Gizmodo’s request for comment.
That same report from the Times also clarified that the NSA’s internal tests with Mythos were less apocalyptic than online rumors might suggest. According to federal officials cited in the report, the tests were carried out in a digital environment so robustly controlled that it’s very unlikely any hacker or foreign intelligence agency could replicate them. The officials also told the Times that even though Mythos was able to identify cybersecurity vulnerabilities, it didn’t actually exploit them. The author of the report in The Economist—the one that had been the initial cause of all the worry—has also admitted that his portrayal of the NSA’s tests with Mythos had been misleading. The tests “surely [involved] using Mythos alongside other tools under very particular conditions,” he wrote in a X post on Sunday. “I quoted [Senator Warner] to give a sense of Mythos’ potency. But it was a mistake not to have added caveats.” #Anthropics #Mythos #Reportedly #Hacked #NSAs #Sensitive #Systems #HoursAI,Anthropic,Mythos,NSA,Trump,White House")
![Anthropic’s Mythos AI Reportedly Hacked the NSA’s Most Sensitive Systems ‘in Hours’
When Anthropic first disclosed Mythos in April, it sent an anxious shockwave through much of the cybersecurity sector. The new AI model was allegedly so ruthlessly effective at finding and exploiting security vulnerabilities in existing software that the company said it was holding off on a public release and would only grant access to a small group of early testers, including the U.S. National Security Agency (NSA). Another wave of fear reverberated this week after the NSA reportedly discovered multiple vulnerabilities within its own cybersecurity systems during its tests with Mythos. If that agency—which supposedly boasts the most impenetrable cyberdefenses in the world—can be hacked by Mythos, what hope does the rest of the world’s cybersecurity infrastructure have? This latest round of panic began with what seems to have been something of a game of telephone: Someone says one thing, which gets repeated by another, and another after that, and along that chain of communication, the original statement is distorted. Last week, The Economist reported that during a June 11 hearing before the Senate Committee on Banking, Housing, and Urban Affairs, Democratic Senator Mark Warner of Virginia said that Mythos had broken into “almost all of [the NSA’s] classified systems, not in weeks, but in hours.” Warner said he’d received that information from the head of the NSA himself, General Joshua Rudd, who also leads the Pentagon’s Cyber Command division. On Monday, a coalition of intelligence agencies—including the NSA and its counterparts in Canada, the U.K., Australia, and New Zealand— issued an unusually public warning that the risk that AI now poses for cybersecurity warrants a “whole-of-society response.”
The Economist’s report was seen by some as evidence that the worst fears about Mythos were true, a reaction that was undoubtedly fueled also by the aura of power and mystery that has coalesced around the model in recent months. That aura has arguably been a boon for Anthropic, which recently usurped OpenAI as the most valuable startup in the world and is preparing for what’s expected to be a historic IPO.
But it’s also been a contributing factor in its latest skirmish with the Trump administration, which ordered the company earlier this month to restrict access for all foreign nationals to Fable 5, a “Mythos-class” model that had recently been made publicly available and which was built with safeguards that to some users were annoyingly stringent. Citing national security concerns, the administration invoked an obscure piece of export control legislation, a move that, according to some legal experts, is spurious. Many cybersecurity experts, meanwhile, argued that the ban would hamstring U.S. cybersecurity defenses and give adversaries like China the upper hand. That argument was seemingly vindicated by a Tuesday report from the New York Times which said that Trump’s ban—which also targeted another model called Mythos 5, which had only been made available to a small group of organizations—had put the kibosh on the NSA’s internal tests with Mythos, and that the administration was now working with Anthropic to reinstate the agency’s access for limited purposes related to national security. The NSA did not immediately respond to Gizmodo’s request for comment.
That same report from the Times also clarified that the NSA’s internal tests with Mythos were less apocalyptic than online rumors might suggest. According to federal officials cited in the report, the tests were carried out in a digital environment so robustly controlled that it’s very unlikely any hacker or foreign intelligence agency could replicate them. The officials also told the Times that even though Mythos was able to identify cybersecurity vulnerabilities, it didn’t actually exploit them. The author of the report in The Economist—the one that had been the initial cause of all the worry—has also admitted that his portrayal of the NSA’s tests with Mythos had been misleading. The tests “surely [involved] using Mythos alongside other tools under very particular conditions,” he wrote in a X post on Sunday. “I quoted [Senator Warner] to give a sense of Mythos’ potency. But it was a mistake not to have added caveats.” #Anthropics #Mythos #Reportedly #Hacked #NSAs #Sensitive #Systems #HoursAI,Anthropic,Mythos,NSA,Trump,White House](https://gizmodo.com/app/uploads/2026/06/GeneralJoshuaRudd-1280x853.jpg "Anthropic’s Mythos AI Reportedly Hacked the NSA’s Most Sensitive Systems ‘in Hours’
When Anthropic first disclosed Mythos in April, it sent an anxious shockwave through much of the cybersecurity sector. The new AI model was allegedly so ruthlessly effective at finding and exploiting security vulnerabilities in existing software that the company said it was holding off on a public release and would only grant access to a small group of early testers, including the U.S. National Security Agency (NSA). Another wave of fear reverberated this week after the NSA reportedly discovered multiple vulnerabilities within its own cybersecurity systems during its tests with Mythos. If that agency—which supposedly boasts the most impenetrable cyberdefenses in the world—can be hacked by Mythos, what hope does the rest of the world’s cybersecurity infrastructure have? This latest round of panic began with what seems to have been something of a game of telephone: Someone says one thing, which gets repeated by another, and another after that, and along that chain of communication, the original statement is distorted. Last week, The Economist reported that during a June 11 hearing before the Senate Committee on Banking, Housing, and Urban Affairs, Democratic Senator Mark Warner of Virginia said that Mythos had broken into “almost all of [the NSA’s] classified systems, not in weeks, but in hours.” Warner said he’d received that information from the head of the NSA himself, General Joshua Rudd, who also leads the Pentagon’s Cyber Command division. On Monday, a coalition of intelligence agencies—including the NSA and its counterparts in Canada, the U.K., Australia, and New Zealand— issued an unusually public warning that the risk that AI now poses for cybersecurity warrants a “whole-of-society response.”
The Economist’s report was seen by some as evidence that the worst fears about Mythos were true, a reaction that was undoubtedly fueled also by the aura of power and mystery that has coalesced around the model in recent months. That aura has arguably been a boon for Anthropic, which recently usurped OpenAI as the most valuable startup in the world and is preparing for what’s expected to be a historic IPO.
But it’s also been a contributing factor in its latest skirmish with the Trump administration, which ordered the company earlier this month to restrict access for all foreign nationals to Fable 5, a “Mythos-class” model that had recently been made publicly available and which was built with safeguards that to some users were annoyingly stringent. Citing national security concerns, the administration invoked an obscure piece of export control legislation, a move that, according to some legal experts, is spurious. Many cybersecurity experts, meanwhile, argued that the ban would hamstring U.S. cybersecurity defenses and give adversaries like China the upper hand. That argument was seemingly vindicated by a Tuesday report from the New York Times which said that Trump’s ban—which also targeted another model called Mythos 5, which had only been made available to a small group of organizations—had put the kibosh on the NSA’s internal tests with Mythos, and that the administration was now working with Anthropic to reinstate the agency’s access for limited purposes related to national security. The NSA did not immediately respond to Gizmodo’s request for comment.
That same report from the Times also clarified that the NSA’s internal tests with Mythos were less apocalyptic than online rumors might suggest. According to federal officials cited in the report, the tests were carried out in a digital environment so robustly controlled that it’s very unlikely any hacker or foreign intelligence agency could replicate them. The officials also told the Times that even though Mythos was able to identify cybersecurity vulnerabilities, it didn’t actually exploit them. The author of the report in The Economist—the one that had been the initial cause of all the worry—has also admitted that his portrayal of the NSA’s tests with Mythos had been misleading. The tests “surely [involved] using Mythos alongside other tools under very particular conditions,” he wrote in a X post on Sunday. “I quoted [Senator Warner] to give a sense of Mythos’ potency. But it was a mistake not to have added caveats.” #Anthropics #Mythos #Reportedly #Hacked #NSAs #Sensitive #Systems #HoursAI,Anthropic,Mythos,NSA,Trump,White House")
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