Anthropic shipped Opus 5.5, the first model in a 5.5 family: Fable 5.1-level on most work at 40% less cost than Opus 5, and its first release since calling for pacing the frontier. About an hour later OpenAI answered with GPT-6 Sol and Luna at half the price of their 5.6 equivalents.
Tabarrok on a new Epoch AI report: the cost of a fixed level of AI performance has fallen about 47% per quarter for three years, a 13x drop per year. The 75%-on-GPQA-Diamond price went from roughly $0.30 a question with o3 in early 2025 to $0.0004 with GPT-5.6 Luna.
Isaac Saul grants the administration's point that a White House press pass is a privilege, not a right, then argues that revoking access over the content of coverage is viewpoint discrimination and expects the outlets to win their suits. The DOJ filed its defense of the ban this morning.
Cryptocellar validates a break of German Army message MVUEH from 10 July 1941, submitted by Carter Leffer using GPT-6 Astra. The key turned out to be entirely different from the day's other keys, down to the wheel order, and the plaintext is a near-duplicate of a message broken in 2017.