xAI’s Grok 4 Heavy still leads on Humanity’s Last Exam with a 44.4% score, compared to GPT-5 Pro’s 42.0% (Python + search, with blocklist).

Available to all ChatGPT users, but with an undisclosed prompt cap for free users.

GPT-5, GPT-5 mini, and GPT-5 nano are the 3 variants available via OpenAI’s API.

OpenAI tested GPT-5 for “over five thousand hours” to understand its safety risks.

“[M]aking sure the model doesn’t lie to users,” GPT-5’s safety research lead Alex Beutel said.

GPT-5 doesn’t feel like a dramatic leap over other LLMs, early testers said.

GPT-5 costs $1.25/$10 per M tokens vs. GPT-4o’s $2.5/$10, Gemini’s $2.5/$15, and Claude’s $15/$75.

Relatedly, OpenAI is paying millions of dollars in bonuses to ~1K employees, including researchers and engineers.

“[A] lot of misinformation circulating about my past roles at Walden International and Cadence Design Systems,” Lip-Bu Tan said in a note to Intel’s staff.

Thu.: Trump urged Tan to resign over what he called conflicts of interest.

Tan and some Intel directors have reportedly disagreed over strategy early in his tenure.

Whether Intel should stay in chip manufacturing sparked an early clash between Tan and board chair Yeary, sources said.

100+ investments were made in China by Tan’s VC firm Walden International, including SMIC (China’s largest chipmaker).

-3% for Intel on Thu. after Trump’s response.