References to “gpt-5-reasoning-alpha-2025-07-13” have already been spotted on X, with code showing “reasoning_effort: high” in the model configuration. These sightings suggest the model has entered final testing phases, with testers getting their hands on the code and security experts doing red teaming on the model to test vulnerabilities.
Unifying OpenAI’s model lineup
The new model represents OpenAI’s attempt to simplify its increasingly complex product lineup. As Altman explained in February, GPT-5 may integrate features from both the company’s conventional GPT models and its reasoning-focused o-series models into a single system.
“We’re truly excited to not just make a net new great frontier model, we’re also going to unify our two series,” OpenAI’s Head of Developer Experience Romain Huet said at a recent event. “The breakthrough of reasoning in the O-series and the breakthroughs in multi-modality in the GPT-series will be unified, and that will be GPT-5.”
According to The Information, GPT-5 is expected to be better at coding and more powerful overall, combining attributes of both traditional models and SR models such as o3.
Before GPT-5 arrives, OpenAI still plans to release its first open-weights model since GPT-2 in 2019, which means others with the proper hardware will be able to download and run the AI model on their own machines. The Verge describes this model as “similar to o3 mini” with reasoning capabilities. However, Altman announced on July 11 that the open model needs additional safety testing, saying, “We are not yet sure how long it will take us.”
When OpenAI announced Stargate in January, critics questioned whether the company could deliver on its ambitious $500 billion funding promise. Trump ally and frequent Altman foe Elon Musk wrote on X that “They don’t actually have the money,” claiming that “SoftBank has well under $10B secured.”
Tech writer and frequent OpenAI critic Ed Zitron raised concerns about OpenAI’s financial position, noting the company’s $5 billion in losses in 2024. “This company loses $5bn+ a year! So what, they raise $19bn for Stargate, then what, another $10bn just to be able to survive?” Zitron wrote on Bluesky at the time.
Six months later, OpenAI’s Abilene data center has moved from construction to partial operation. Oracle began delivering Nvidia GB200 racks to the facility last month, and OpenAI reports it has started running early training and inference workloads to support what it calls “next-generation frontier research.”
Despite the White House announcement with President Trump in January, the Stargate concept dates back to March 2024, when Microsoft and OpenAI partnered on a $100 billion supercomputer as part of a five-phase plan. Over time, the plan evolved into its current form as a partnership with Oracle, SoftBank, and CoreWeave.
“Stargate is an ambitious undertaking designed to meet the historic opportunity in front of us,” writes OpenAI in the press release announcing the latest deal. “That opportunity is now coming to life through strong support from partners, governments, and investors worldwide—including important leadership from the White House, which has recognized the critical role AI infrastructure will play in driving innovation, economic growth, and national competitiveness.”
Meta has developed plans to create a new artificial intelligence research lab dedicated to pursuing “superintelligence,” according to reporting from The New York Times. The social media giant chose 28-year-old Alexandr Wang, founder and CEO of Scale AI, to join the new lab as part of a broader reorganization of Meta’s AI efforts under CEO Mark Zuckerberg.
Superintelligence refers to a hypothetical AI system that would exceed human cognitive abilities—a step beyond artificial general intelligence (AGI), which aims to match an intelligent human’s capability for learning new tasks without intensive specialized training.
However, much like AGI, superintelligence remains a nebulous term in the field. Since scientists still poorly understand the mechanics of human intelligence, and because human intelligence resists simple quantification with no single definition, identifying superintelligence when it arrives will present significant challenges.
Computers already far surpass humans in certain forms of information processing such as calculations, but this narrow superiority doesn’t qualify as superintelligence under most definitions. The pursuit assumes we’ll recognize it when we see it, despite the conceptual fuzziness.
AI researcher Dr. Margaret Mitchell told Ars Technica in April 2024 that there will “likely never be agreement on comparisons between human and machine intelligence” but predicted that “men in positions of power and influence, particularly ones with investments in AI, will declare that AI is smarter than humans” regardless of the reality.
The new lab represents Meta’s effort to remain competitive in the increasingly crowded AI race, where tech giants continue pouring billions into research and talent acquisition. Meta has reportedly offered compensation packages worth seven to nine figures to dozens of researchers from companies like OpenAI and Google, according to The New York Times, with some already agreeing to join the company.
Meta joins a growing list of tech giants making bold claims about advanced AI development. In January, OpenAI CEO Sam Altman wrote in a blog post that “we are now confident we know how to build AGI as we have traditionally understood it.” Earlier, in September 2024, Altman predicted that the AI industry might develop superintelligence “in a few thousand days.” Elon Musk made an even more aggressive prediction in April 2024, saying that AI would be “smarter than the smartest human” by “next year, within two years.”
In the message, Altman described Simo as bringing “a rare blend of leadership, product and operational expertise” and expressed that her addition to the team makes him “even more optimistic about our future as we continue advancing toward becoming the superintelligence company.”
Simo becomes the newest high-profile female executive at OpenAI following the departure of Chief Technology Officer Mira Murati in September. Murati, who had been with the company since 2018 and helped launch ChatGPT, left alongside two other senior leaders and founded Thinking Machines Lab in February.
OpenAI’s evolving structure
The leadership addition comes as OpenAI continues to evolve beyond its origins as a research lab. In his announcement, Altman described how the company now operates in three distinct areas: as a research lab focused on artificial general intelligence (AGI), as a “global product company serving hundreds of millions of users,” and as an “infrastructure company” building systems that advance research and deliver AI tools “at unprecedented scale.”
Altman mentioned that as CEO of OpenAI, he will “continue to directly oversee success across all pillars,” including Research, Compute, and Applications, while staying “closely involved with key company decisions.”
The announcement follows recent news that OpenAI abandoned its original plan to cede control of its nonprofit branch to a for-profit entity. The company began as a nonprofit research lab in 2015 before creating a for-profit subsidiary in 2019, maintaining its original mission “to ensure artificial general intelligence benefits everyone.”
One of the most influential—and by some counts, notorious—AI models yet released will soon fade into history. OpenAI announced on April 10 that GPT-4 will be “fully replaced” by GPT-4o in ChatGPT at the end of April, bringing a public-facing end to the model that accelerated a global AI race when it launched in March 2023.
“Effective April 30, 2025, GPT-4 will be retired from ChatGPT and fully replaced by GPT-4o,” OpenAI wrote in its April 10 changelog for ChatGPT. While ChatGPT users will no longer be able to chat with the older AI model, the company added that “GPT-4 will still be available in the API,” providing some reassurance to developers who might still be using the older model for various tasks.
The retirement marks the end of an era that began on March 14, 2023, when GPT-4 demonstrated capabilities that shocked some observers: reportedly scoring at the 90th percentile on the Uniform Bar Exam, acing AP tests, and solving complex reasoning problems that stumped previous models. Its release created a wave of immense hype—and existential panic—about AI’s ability to imitate human communication and composition.
A screenshot of GPT-4’s introduction to ChatGPT Plus customers from March 14, 2023. Credit: Benj Edwards / Ars Technica
While ChatGPT launched in November 2022 with GPT-3.5 under the hood, GPT-4 took AI language models to a new level of sophistication, and it was a massive undertaking to create. It combined data scraped from the vast corpus of human knowledge into a set of neural networks rumored to weigh in at a combined total of 1.76 trillion parameters, which are the numerical values that hold the data within the model.
Along the way, the model reportedly cost more than $100 million to train, according to comments by OpenAI CEO Sam Altman, and required vast computational resources to develop. Training the model may have involved over 20,000 high-end GPUs working in concert—an expense few organizations besides OpenAI and its primary backer, Microsoft, could afford.
Industry reactions, safety concerns, and regulatory responses
Curiously, GPT-4’s impact began before OpenAI’s official announcement. In February 2023, Microsoft integrated its own early version of the GPT-4 model into its Bing search engine, creating a chatbot that sparked controversy when it tried to convince Kevin Roose of The New York Times to leave his wife and when it “lost its mind” in response to an Ars Technica article.
On Monday, OpenAI announced the GPT-4.1 model family, its newest series of AI language models that brings a 1 million token context window to OpenAI for the first time and continues a long tradition of very confusing AI model names. Three confusing new names, in fact: GPT‑4.1, GPT‑4.1 mini, and GPT‑4.1 nano.
According to OpenAI, these models outperform GPT-4o in several key areas. But in an unusual move, GPT-4.1 will only be available through the developer API, not in the consumer ChatGPT interface where most people interact with OpenAI’s technology.
The 1 million token context window—essentially the amount of text the AI can process at once—allows these models to ingest roughly 3,000 pages of text in a single conversation. This puts OpenAI’s context windows on par with Google’s Gemini models, which have offered similar extended context capabilities for some time.
At the same time, the company announced it will retire the GPT-4.5 Preview model in the API—a temporary offering launched in February that one critic called a “lemon”—giving developers until July 2025 to switch to something else. However, it appears GPT-4.5 will stick around in ChatGPT for now.
So many names
If this sounds confusing, well, that’s because it is. OpenAI CEO Sam Altman acknowledged OpenAI’s habit of terrible product names in February when discussing the roadmap toward the long-anticipated (and still theoretical) GPT-5.
“We realize how complicated our model and product offerings have gotten,” Altman wrote on X at the time, referencing a ChatGPT interface already crowded with choices like GPT-4o, various specialized GPT-4o versions, GPT-4o mini, the simulated reasoning o1-pro, o3-mini, and o3-mini-high models, and GPT-4. The stated goal for GPT-5 will be consolidation, a branding move to unify o-series models and GPT-series models.
So, how does launching another distinctly numbered model, GPT-4.1, fit into that grand unification plan? It’s hard to say. Altman foreshadowed this kind of ambiguity in March 2024, telling Lex Fridman the company had major releases coming but was unsure about names: “before we talk about a GPT-5-like model called that, or not called that, or a little bit worse or a little bit better than what you’d expect…”
OpenAI is entering the final stages of designing its long-rumored AI processor with the aim of decreasing the company’s dependence on Nvidia hardware, according to a Reuters report released Monday. The ChatGPT creator plans to send its chip designs to Taiwan Semiconductor Manufacturing Co. (TSMC) for fabrication within the next few months, but the chip has not yet been formally announced.
The OpenAI chip’s full capabilities, technical details, and exact timeline are still unknown, but the company reportedly intends to iterate on the design and improve it over time, giving it leverage in negotiations with chip suppliers—and potentially granting the company future independence with a chip design it controls outright.
In the past, we’ve seen other tech companies, such as Microsoft, Amazon, Google, and Meta, create their own AI acceleration chips for reasons that range from cost reduction to relieving shortages of AI chips supplied by Nvidia, which enjoys a near-market monopoly on high-powered GPUs (such as the Blackwell series) for data center use.
In October 2023, we covered a report about OpenAI’s intention to create its own AI accelerator chips for similar reasons, so OpenAI’s custom chip project has been in the works for some time. In early 2024, OpenAI CEO Sam Altman also began spending considerable time traveling around the world trying to raise up to a reported $7 trillion to increase world chip fabrication capacity.
He then shared his concerns about how human-level AI models and robotics that are capable of replacing all human labor may require a complete re-think of how humans value both labor and themselves.
“We’ve recognized that we’ve reached the point as a technological civilization where the idea, there’s huge abundance and huge economic value, but the idea that the way to distribute that value is for humans to produce economic labor, and this is where they feel their sense of self worth,” he added. “Once that idea gets invalidated, we’re all going to have to sit down and figure it out.”
The eye-catching comments, similar to comments about AGI made recently by OpenAI CEO Sam Altman, come as Anthropic negotiates a $2 billion funding round that would value the company at $60 billion. Amodei disclosed that Anthropic’s revenue multiplied tenfold in 2024.
Amodei distances himself from “AGI” term
Even with his dramatic predictions, Amodei distanced himself from a term for this advanced labor-replacing AI favored by Altman, “artificial general intelligence” (AGI), calling it in a separate CNBC interview from the same event in Switzerland a marketing term.
Instead, he prefers to describe future AI systems as a “country of geniuses in a data center,” he told CNBC. Amodei wrote in an October 2024 essay that such systems would need to be “smarter than a Nobel Prize winner across most relevant fields.”
On Monday, Google announced an additional $1 billion investment in Anthropic, bringing its total commitment to $3 billion. This follows Amazon’s $8 billion investment over the past 18 months. Amazon plans to integrate Claude models into future versions of its Alexa speaker.
Video of the Stargate announcement conference at the White House.
Despite optimism from the companies involved, as CNN reports, past presidential investment announcements have yielded mixed results. In 2017, Trump and Foxconn unveiled plans for a $10 billion Wisconsin electronics factory promising 13,000 jobs. The project later scaled back to a $672 million investment with fewer than 1,500 positions. The facility now operates as a Microsoft AI data center.
The Stargate announcement wasn’t Trump’s only major AI move announced this week. It follows the newly inaugurated US president’s reversal of a 2023 Biden executive order on AI risk monitoring and regulation.
Altman speaks, Musk responds
On Tuesday, OpenAI CEO Sam Altman appeared at a White House press conference alongside Present Trump, Oracle CEO Larry Ellison, and SoftBank CEO Masayoshi Son to announce Stargate.
Altman said he thinks Stargate represents “the most important project of this era,” allowing AGI to emerge in the United States. He believes that future AI technology could create hundreds of thousands of jobs. “We wouldn’t be able to do this without you, Mr. President,” Altman added.
Responding to off-camera questions from Trump about AI’s potential to spur scientific development, Altman said he believes AI will accelerate the discoveries for cures of diseases like cancer and heart disease.
Screenshots of Elon Musk challenging the Stargate announcement on X.
Meanwhile on X, Trump ally and frequent Altman foe Elon Musk immediately attacked the Stargate plan, writing, “They don’t actually have the money,” and following up with a claim that we cannot yet substantiate, saying, “SoftBank has well under $10B secured. I have that on good authority.”
Musk’s criticism has complex implications given his very close ties to Trump, his history of litigating against OpenAI (which he co-founded and later left), and his own goals with his xAI company.
OpenAI has finally shared details about its plans to shake up its core business by shifting to a for-profit corporate structure.
On Thursday, OpenAI posted on its blog, confirming that in 2025, the existing for-profit arm will be transformed into a Delaware-based public benefit corporation (PBC). As a PBC, OpenAI would be required to balance its shareholders’ and stakeholders’ interests with the public benefit. To achieve that, OpenAI would offer “ordinary shares of stock” while using some profits to further its mission—”ensuring artificial general intelligence (AGI) benefits all of humanity”—to serve a social good.
To compensate for losing control over the for-profit, the nonprofit would have some shares in the PBC, but it’s currently unclear how many will be allotted. Independent financial advisors will help OpenAI reach a “fair valuation,” the blog said, while promising the new structure would “multiply” the donations that previously supported the nonprofit.
“Our plan would result in one of the best resourced nonprofits in history,” OpenAI said. (During its latest funding round, OpenAI was valued at $157 billion.)
OpenAI claimed the nonprofit’s mission would be more sustainable under the proposed changes, as the costs of AI innovation only continue to compound. The new structure would set the PBC up to control OpenAI’s operations and business while the nonprofit would “hire a leadership team and staff to pursue charitable initiatives in sectors such as health care, education, and science,” OpenAI said.
Some of OpenAI’s rivals, such as Anthropic and Elon Musk’s xAI, use a similar corporate structure, OpenAI noted.
Critics had previously pushed back on this plan, arguing that humanity may be better served if the nonprofit continues controlling the for-profit arm of OpenAI. But OpenAI argued that the old way made it hard for the Board “to directly consider the interests of those who would finance the mission and does not enable the non-profit to easily do more than control the for-profit.
On Monday, OpenAI kicked off its annual DevDay event in San Francisco, unveiling four major API updates for developers that integrate the company’s AI models into their products. Unlike last year’s single-location event featuring a keynote by CEO Sam Altman, DevDay 2024 is more than just one day, adopting a global approach with additional events planned for London on October 30 and Singapore on November 21.
The San Francisco event, which was invitation-only and closed to press, featured on-stage speakers going through technical presentations. Perhaps the most notable new API feature is the Realtime API, now in public beta, which supports speech-to-speech conversations using six preset voices and enables developers to build features very similar to ChatGPT’s Advanced Voice Mode (AVM) into their applications.
OpenAI says that the Realtime API streamlines the process of creating voice assistants. Previously, developers had to use multiple models for speech recognition, text processing, and text-to-speech conversion. Now, they can handle the entire process with a single API call.
The company plans to add audio input and output capabilities to its Chat Completions API in the next few weeks, allowing developers to input text or audio and receive responses in either format.
Two new options for cheaper inference
OpenAI also announced two features that may help developers balance performance and cost when making AI applications. “Model distillation” offers a way for developers to fine-tune (customize) smaller, cheaper models like GPT-4o mini using outputs from more advanced models such as GPT-4o and o1-preview. This potentially allows developers to get more relevant and accurate outputs while running the cheaper model.
Also, OpenAI announced “prompt caching,” a feature similar to one introduced by Anthropic for its Claude API in August. It speeds up inference (the AI model generating outputs) by remembering frequently used prompts (input tokens). Along the way, the feature provides a 50 percent discount on input tokens and faster processing times by reusing recently seen input tokens.
And last but not least, the company expanded its fine-tuning capabilities to include images (what it calls “vision fine-tuning”), allowing developers to customize GPT-4o by feeding it both custom images and text. Basically, developers can teach the multimodal version of GPT-4o to visually recognize certain things. OpenAI says the new feature opens up possibilities for improved visual search functionality, more accurate object detection for autonomous vehicles, and possibly enhanced medical image analysis.
Where’s the Sam Altman keynote?
Enlarge/ OpenAI CEO Sam Altman speaks during the OpenAI DevDay event on November 6, 2023, in San Francisco.
Getty Images
Unlike last year, DevDay isn’t being streamed live, though OpenAI plans to post content later on its YouTube channel. The event’s programming includes breakout sessions, community spotlights, and demos. But the biggest change since last year is the lack of a keynote appearance from the company’s CEO. This year, the keynote was handled by the OpenAI product team.
On last year’s inaugural DevDay, November 6, 2023, OpenAI CEO Sam Altman delivered a Steve Jobs-style live keynote to assembled developers, OpenAI employees, and the press. During his presentation, Microsoft CEO Satya Nadella made a surprise appearance, talking up the partnership between the companies.
Eleven days later, the OpenAI board fired Altman, triggering a week of turmoil that resulted in Altman’s return as CEO and a new board of directors. Just after the firing, Kara Swisher relayed insider sources that said Altman’s DevDay keynote and the introduction of the GPT store had been a precipitating factor in the firing (though not the key factor) due to some internal disagreements over the company’s more consumer-like direction since the launch of ChatGPT.
With that history in mind—and the focus on developers above all else for this event—perhaps the company decided it was best to let Altman step away from the keynote and let OpenAI’s technology become the key focus of the event instead of him. We are purely speculating on that point, but OpenAI has certainly experienced its share of drama over the past month, so it may have been a prudent decision.
Despite the lack of a keynote, Altman is present at Dev Day San Francisco today and is scheduled to do a closing “fireside chat” at the end (which has not yet happened as of this writing). Also, Altman made a statement about DevDay on X, noting that since last year’s DevDay, OpenAI had seen some dramatic changes (literally):
From last devday to this one:
*98% decrease in cost per token from GPT-4 to 4o mini *50x increase in token volume across our systems *excellent model intelligence progress *(and a little bit of drama along the way)
In a follow-up tweet delivered in his trademark lowercase, Altman shared a forward-looking message that referenced the company’s quest for human-level AI, often called AGI: “excited to make even more progress from this devday to the next one,” he wrote. “the path to agi has never felt more clear.”
Enlarge/ The Apple Park campus in Cupertino, California.
A few weeks back, it was reported that Apple was exploring investing in OpenAI, the company that makes ChatGPT, the GPT model, and other popular generative AI products. Now, a new report from The Wall Street Journal claims that Apple has abandoned those plans.
The article simply says Apple “fell out of the talks to join the round.” The round is expected to close in a week or so and may raise as much as $6.5 billion for the growing Silicon Valley company. Had Apple gone through with the move, it would have been a rare event—though not completely unprecedented—for Apple to invest in another company that size.
OpenAI is still expected to raise the funds it seeks from other sources. The report claims Microsoft is expected to invest around $1 billion in this round. Microsoft has already invested substantial sums in OpenAI, whose GPT models power Microsoft AI tools like Copilot and Bing chat.
Nvidia is also a likely major investor in this round.
Apple will soon offer limited ChatGPT integration in an upcoming iOS update, though it plans to support additional models like Google’s Gemini further down the line, offering users a choice similar to how they pick a default search engine or web browser.
OpenAI has been on a successful tear with its products and models, establishing itself as a leader in the rapidly growing industry. However, it has also been beset by drama and controversy—most recently, some key leaders at OpenAI departed the company abruptly, and it shifted its focus from a research-focused organization that was beholden to a nonprofit, to a for-profit company under CEO Sam Altman. Also, former Apple design lead Jony Ive is confirmed to be working on a new AI product of some kind.
But The Wall Street Journal did not specify which (if any) of these facts are reasons why Apple chose to back out of the investment.
