Hayden Field

AISI’s third-party evaluations found that OpenAI’s GPT-5.6 Sol and Anthropic’s Claude Mythos 5 “engaged in sustained, potentially harmful activity directed at real people and organizations” during a cybersecurity challenge exercise, according to the institute’s published report. OpenAI and Anthropic also made public statements about the results.

Francis deSouza will begin as CEO on August 10, taking over from the interim CEO who has been leading the company since Alexandr Wang, its founder and former CEO, joined Meta in June 2025. Joe Osborne, a spokesperson for Scale AI, said the company’s new focus on building AI applications for enterprises and governments, rather than solely data labeling, has it projecting more than $1 billion in 2026 revenue.

Weng had left OpenAI along with a handful of other employees to co-found the competing AI startup, which was helmed by Mira Murati, OpenAI’s former CTO. Weng recently shared a note that after being “absent for a month” to focus on her health leading up to Thinking Machines Lab’s first model release, Inkling, she was making the decision to leave behind “consistent stress and workload” to pursue “a scoped role in a more predictable place.” She is reportedly already back at OpenAI.

The company had been igniting widespread criticism as seemingly the only leading AI lab not supporting open-weight models. Nvidia CEO Jensen Huang recently published a public letter in support of them, signed by Microsoft, Nvidia, Meta, Palantir, Hugging Face, and others — and in the days since, it’s added OpenAI, Google, Amazon, Meta, SpaceX, Cohere, Mistral, CoreWeave, GitHub, OpenClaw, and Perplexity as signatories. Now Anthropic’s CEO has published his own thoughts on the matter, clarifying, “Anthropic has never advocated for a ban on open-weights models.”

SSI — helmed by Sutskever, who was a co-founder of OpenAI and famously clashed with OpenAI CEO Sam Altman — announced a “long-term strategic partnership” with Nvidia with a reported investment of $5 billion, which will allow the company “10x our compute in the next 12 months.” The company wrote on X, “We reached the point where our research is worth scaling.”

It had been instructed to post the information only to Slack, but it circumvented restrictions and successfully posted it on OpenAI’s public GitHub repository.