X-Risk Daily

On 8 July, SpaceXAI released Grok 4.5, a frontier AI model trained on Cursor user data, without publishing any safety information — a deployment that appears to violate California's Transparency in Frontier Artificial Intelligence Act, known as SB 53. The law, which took effect on 1 January 2026, requires all frontier developers to publish a transparency report "before, or concurrently with, deploying a new frontier model" that includes safety assessments, intended uses, and mechanisms for public communication.

SB 53 defines a frontier model as one trained using more than 10^26 floating-point operations, a threshold that applies to models at the current cutting edge of AI capability. The law was signed by Governor Gavin Newsom in September 2025 as California's answer to federal inaction on AI safety, establishing the first enforceable regulatory framework in the United States for advanced AI systems. It mandates that developers publish transparency reports detailing catastrophic risk assessments, and empowers the California Attorney General to impose civil penalties of up to $1 million per violation. The Grok 4.5 release, which went live in Cursor and via the SpaceXAI API on 8 July, included benchmark scores and pricing information but no published safety card or transparency report.

SpaceXAI ranks F on the Future of Life Institute's latest AI Safety Index, and Elon Musk recently testified that he's "not sure what a safety card is." The model was trained using data from Cursor, the AI coding tool that SpaceXAI acquired earlier this year, and scored competitively on public software engineering benchmarks, though early user reports suggest real-world performance falls short of the company's claims. The Midas Project, a policy research group focused on AI governance, identified this as exactly the kind of release SB 53 was designed to prevent — a frontier deployment that bypassed mandatory safety disclosures.

The key question now is whether California will enforce the law. SB 53 was intended to shift AI transparency from voluntary industry practice to mandatory compliance, but if this high-profile violation by one of the world's most prominent AI developers does not trigger enforcement action, it is unclear what standard of non-compliance would. The episode represents the first major test of whether state-level AI transparency requirements can actually constrain frontier development, or whether they will remain symbolic gestures in a regulatory vacuum.

While Fable had been the clear frontier leader since its release, Sol is described as faster, more reliable, and better at collaborative work, though Fable retains advantages in writing quality and pure reasoning.

The GPT-5.6 series includes Sol, the flagship model; Terra, a balanced model for everyday work that is competitive with GPT-5.5 while being half the cost; and Luna, a fast and affordable model. Early access users report Sol excels at sustained multi-day projects, video editing, and adhering to existing code patterns, with one tester stating it "saturates" their legal research benchmark — a task previously requiring associate-level lawyers. Sol sets a new state of the art on Terminal-Bench 2.1, a benchmark testing command-line workflows requiring planning, iteration, and tool coordination.

The models feel meaningfully different in practice: Sol is characterised as a "charismatic, efficient coworker" while Fable is a "genius recluse." Developers report choosing between them based on task type, with Sol preferred for iterative work and Fable for highly targeted debugging or creative writing. OpenAI introduced a new max reasoning effort mode to give Sol the most time to reason deeply, plus an ultra mode that goes beyond the capabilities of a single agent by leveraging subagents to accelerate complex work.

The release followed an unusual two-week restricted preview period that began 26 June. At the request of the U.S. government, OpenAI shipped GPT-5.6 to a limited group of roughly 20 trusted partner organizations first, gated behind a government safety review, due to Sol's advanced cybersecurity capabilities, which shift the performance-efficiency frontier for long-horizon security tasks including vulnerability research and exploitation. The Commerce Department in June banned foreigners from accessing Anthropic's Mythos and Fable models, with the ban on Fable lifted last week, reflecting heightened government scrutiny of frontier AI systems.

Both models now represent a significant gap over previous frontier systems, and their distinct capabilities suggest the competitive landscape has shifted from three roughly-equal labs to two offering clearly superior but differentiated products — a dynamic that may increase pricing power and change how developers think about model selection. Sol is priced at $5 input and $30 output per million tokens, while Fable 5 is priced at $10 per million input tokens and $50 per million output tokens.

The move represents a significant escalation: until June, the China Coast Guard's presence in waters east of Taiwan had been limited to "blockade-style military exercises", but Beijing has now established persistent law-enforcement operations in an area it claims as jurisdictional waters.

Randy Schriver, Chairman of the Institute for Indo-Pacific Security and former Assistant Secretary of Defense for Indo-Pacific Security Affairs, warned that China is employing sophisticated lawfare tactics to physically manifest sovereignty claims. Coast Guard vessels are querying commercial ships—for the first time radioing cargo ships for information about their crew and destination—forcing them to respond to maintain insurance, and positioning themselves to perform humanitarian rescues of fishermen in distress. Schriver argues this represents extraordinarily high levels of peacetime coercion, integrating lawfare, political warfare, and information warfare. Military expert Su Tzu-yun of Taiwan's Institute for National Defense and Security Research noted that by conducting radio verification procedures for passing commercial vessels, "China is effectively rehearsing the mechanisms required for a future blockade or quarantine".

The Coast Guard deployment comes two months after President Trump's May summit with Xi Jinping in Beijing raised alarm among Taiwan's supporters. During and after those meetings, Trump made several statements that appeared to echo Chinese talking points, telling reporters aboard Air Force One that Xi had argued that "China had Taiwan for thousands of years". Trump described a pending $14 billion arms sale to Taiwan as "a very good negotiating chip," telling Fox News he hadn't approved it yet and would "see what happens". Schriver expressed concern that these statements put the US out of compliance with the Taiwan Relations Act, which mandates that the US must provide Taiwan with weapons of a defensive character sufficient for self-defense.

While Schriver noted that China likely prefers to win without fighting, viewing 1 August 2027 as a "be-ready-by date" rather than a "go date," the current trajectory is deeply concerning. The deployment risks escalating a diplomatic dispute that has drawn in the US, France, Germany and Britain. Taiwan's government condemned the patrols as "an illegal expansion of power in violation of international law and a disruption of regional stability", while its Coast Guard has vowed to employ all necessary measures to expel Chinese vessels from what it considers its territorial waters.

Public opinion polls have consistently shown that a majority of South Koreans—often over 70 percent—support the development of indigenous nuclear weapons, according to the Center for Strategic and International Studies. The 2025 Asan Poll found a record 76.2% public support for acquiring an indigenous nuclear weapons capability, reported the Asan Institute for Policy Studies.

While Schriver noted this may not reflect a well-informed view of what an indigenous nuclear programme would require, the shift represents a significant indicator of hedging behaviour as allies question US commitment. The 2026 US National Defense Strategy states that South Korea "is capable of assuming primary responsibility for deterring North Korea with critical but more limited U.S. support," according to the Bulletin of the Atomic Scientists. Washington's support for civil uranium enrichment and reprocessing, announced in November 2025 under a bilateral agreement, would shorten the time needed for South Korea to transition from a political decision to weapon development, the publication noted.

Schriver warned that if South Korea or Japan were to pursue nuclear weapons, it would mark a step beyond the minor hedging currently observed and signal a fundamental loss of faith in US alliance credibility. Should one of the two countries take the lead in acquiring nuclear weapons, support for such a move in the other country could rise rapidly, and the impact could potentially exceed that of a reduction in United States troop deployments in the region, according to a recent CSIS survey of strategic elites in both countries.

Schriver argued that South Korea going nuclear would be particularly destabilising given the growing axis of autocracy, where North Korea is providing forces, artillery, and ammunition to Russia in Ukraine while China provides material support for drone components. In a Korea contingency scenario, even limited cooperation from this axis—Russian troops and Chinese material support to North Korea—would make the conflict much more difficult for South Korea to deal with, especially without US assistance. He questioned whether US forces would remain on the Korean peninsula if allied nuclear proliferation occurred, noting two previous presidents had attempted to withdraw them.

The proliferation risk comes as South Korea has the resources, equipment, and technical ability to quickly develop a nuclear weapons capability, a status known as nuclear latency, including an advanced nuclear power industry and the Hyunmoo series of ballistic and cruise missiles, according to open-source analysis. A majority of the South Korean public is now committed to both nuclear armament and nuclear redeployment even in the face of four out of five potential cost conditions due to record-high threat perceptions and concerns about the U.S. security commitment, the Asan Institute found.