Research Papers

Mimir v1: 1B model trained on permissible data matches 4B rivals

The Frontier

Mimir v1: 1B model trained on permissible data matches 4B rivals

Two research stories this morning, one about what open models are trained on, one about what self-improving agents remember. Denmark's Foundation Models project says a 1-billion-parameter model built only on legally clean data goes toe-to-toe with models four times its size, and a new study quantifies how easily agents bake unsafe behavior into their persistent skills. Danish researchers say their 1B model, trained only on permissible data, matches rivals four times its size.

Study: frontier agents fail at open-ended AI research

The Frontier

Study: frontier agents fail at open-ended AI research

The "AI does AI research" narrative took a hit from an independent evaluation today, Google quietly made visible AI watermarks optional, and the company pushed encrypted inference a step closer to production. A busy morning for the frontier — and for the people trying to verify its claims. A new "shadow evaluation" from Princeton and the UK AI Security Institute found that frontier agents can do the engineering of AI research but not the research itself — both papers the agent produced were…

Gemini 3.7 Flash lands with coding gains at half the price

The Frontier

Gemini 3.7 Flash lands with coding gains at half the price

Google's Flash line is now on a three-week release cycle, and its newest iteration arrives with meaningfully better coding scores and a price tag that undercuts its own predecessor by 50 percent. Google shipped Gemini 3.7 Flash on Thursday, three weeks after Gemini 3.6 Flash, calling it its "most intelligent workhorse model yet for coding and agents" — and pricing it at half of what the previous Flash charged at launch.

OpenAI previews Ultrafast mode for GPT-5.6 Sol

The Frontier

OpenAI previews Ultrafast mode for GPT-5.6 Sol

The speed wars just got a new front: OpenAI put its smartest model in a fast lane, Google shipped another Flash on a three-week cadence, and DeepSeek open-sourced the harness layer of its agent stack. Three moves, one theme — nobody is waiting. OpenAI is previewing Ultrafast, a new service tier that runs GPT-5.6 Sol up to 14 times faster than standard processing, generating as many as 750 output tokens per second on Cerebras hardware — with no quality compromise, the company says.

Anthropic's Fable 5 stalls as corporate AI spending hits a ceiling

The Arena

Anthropic's Fable 5 stalls as corporate AI spending hits a ceiling

Spending data is questioning the core bet of the frontier labs — that each new, pricier model sells itself — while Morgan Stanley warns compute stays scarce for years and the milestones of automated AI research keep falling. Anthropic's most capable model is its slowest seller: Fable 5 accounted for just 6 percent of the tokens companies purchased from Anthropic in its first month, according to spending data from fintech Ramp.

SSI's first model reportedly trains itself while it thinks

The Frontier

SSI's first model reportedly trains itself while it thinks

The most mysterious lab in AI may finally be about to show its hand. On August 13, a post on X from an account called "Three Strawberries" (三只草莓) claimed Safe Superintelligence Inc. — Ilya Sutskever's famously silent startup — has been building a small reasoning engine around test-time training (TTT): a model that keeps updating its own weights while it works, rather than arriving fully formed from pretraining. SSI has not commented, and the claim is unverified.

Ex-Qwen lead's Pragmatik Labs raises $220M at a $2B valuation

The Arena

Ex-Qwen lead's Pragmatik Labs raises $220M at a $2B valuation

Lin Junyang, the researcher who built Alibaba's Qwen into one of the world's most-used open model families, came out of stealth early Wednesday with a company that has no product, no demo, and a $2 billion price tag. That gap is the story. Lin Junyang, the former technical lead of Alibaba's Qwen family, announced the founding of Pragmatik Labs (语用科技) in Shanghai — backed by a $220 million angel round at a $2 billion valuation, closed before the company shipped anything.

AI 101 — What is a context window?

The Frontier

AI 101 — What is a context window?

A context window is the amount of text a language model can look at at one time — its working memory. It is measured in tokens (roughly three-quarters of an English word each), and it caps how much of your prompt, your conversation, or your document the model can actually see when it writes a reply. Everything you want the model to consider must fit inside that window, or it gets cut off, summarized, or ignored. Why it's in the news Context size has quietly become one of the biggest selling…

Upstage ships Solar Pro 4, an agentic model with 512K context

The Frontier

Upstage ships Solar Pro 4, an agentic model with 512K context

Korean AI lab Upstage rounded out its 2026 lineup this week with Solar Pro 4, a closed-API flagship aimed squarely at document-heavy agent work, roughly a week after the open-weights Solar Open 2. It is the company's clearest bet yet that the next AI battleground is finishing office jobs, not passing chat tests. Upstage released Solar Pro 4, a proprietary agentic model for multi-document, multi-tool workloads, with a 512K-token context window and up to 128K output tokens.

LangYa paper: a single AI model now forecasts the global ocean

The Frontier

LangYa paper: a single AI model now forecasts the global ocean

A Chinese research team just published the blueprint for one of the more ambitious AI-for-science systems in the water: a single neural network that forecasts the state of the entire global ocean up to a week out. The Chinese Academy of Sciences' Institute of Oceanology has published the peer-reviewed framework behind LangYa, a large AI model that generates one-to-seven-day forecasts of the global ocean from a single network — no recursive stepping, no ensembles of specialist sub-models. The…

Palo Alto Networks puts OpenAI cyber models inside customer networks

The Guardrails

Palo Alto Networks puts OpenAI cyber models inside customer networks

The frontier cyber-capability story moved from the lab to the enterprise today: OpenAI's most capable defensive AI is about to run inside real corporate networks, under the direction of a security vendor's consultants. Palo Alto Networks' Unit 42 consulting arm will deploy OpenAI's frontier cyber models inside customer environments, expanding the Frontier AI Exposure Analysis service it launched earlier this year.