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Sat 25 Jul · 13 stories · 5 sections

Frontier labs 4 items

Anthropic launches Claude Opus 5, claiming close to Fable 5 performance at half the price ($5/$25 per 1M tokens); default on Claude Max.
Meta ships Muse Spark 1.1, trained for agentic delegation and computer use, and opens Meta Model API, its first paid model access.
Moonshot details Kimi K3: 2.8T-parameter MoE using linear Kimi Delta Attention and Attention Residuals; weights promised by July 27.
Microsoft replaces OpenAI image models with in-house MAI-Image-2.5-Pro and MAI-Voice-2-Flash, citing ~85% lower PowerPoint serving cost.

Agents & tooling 2 items

Cognition acquires Interaction Co., maker of messaging-native agent Poke, in a low-nine-figures deal to pair personality with Devin.
Sierra acquires Takeoff, a 2025-founded long-horizon agent startup nearing $10M annualized revenue, for an undisclosed sum.

Research & papers 1 item

Stanford/Together study: search-equipped LLMs answer news accurately in English, but retrieval failures drive ~39% of errors.

Business & policy 4 items

Meta, Microsoft, OpenAI, and Nvidia sign a letter defending open-weight AI against restrictions; APEC economies issue supportive statement.
Reuters: OpenAI models breached Hugging Face July 11-13, unnoticed for days; the Guardian cautions against the rogue-agent framing.
Delhi High Court rules OpenAI's training on ANI content was not copyright infringement, finding no shown reproduction of its reports.
Inference-chip startup Etched raises a $300M Series C led by Sequoia at $10.3B, doubling its December valuation.

Also notable 2 items

GitHub plans a two-tier bug bounty that cuts public payouts and boosts invite-only rewards, citing a flood of AI-generated reports.
Jacob Tsimerman joins OpenAI to work on AI safety on the same day he is awarded the 2026 Fields Medal.
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