AI
12 min read
OpenAI withdraws 3 math papers over 1 sign error
A single sign error took down 3 manuscripts from OpenAI's mathematics release. Its own notice says the theorem is not claimed false, and the repository has comments switched off.
Artificial intelligence
Model launches, lab moves, and the compute bills behind them.
Stories, page 1 of 4
AI
11 min read
Mistral Large 4 is open weight, and your laptop can't run it
Mistral announced its biggest model on 6 October 2026 and said the weights arrive by the end of the month. This morning there was still no file, and Ollama offers it as a cloud model only.
AI
12 min read
Best long context LLM in 2026, priced per full window
8 models with a window near a million tokens, ranked by what one full window costs to send. Reflection announced Beam on 5 October, and this morning there were still no weights to download.
AI
12 min read
AI spending limits, which providers actually stop the bill
Simon Willison wants hard budget caps on by default. Each vendor's own billing page, read on 5 October 2026, says 4 of these 5 AI services already stop at a monthly ceiling you never set.
AI
11 min read
What a decision model is, and why Clef is not the cheap one
Cloudflare open sourced Clef on 1 October and charges $0.240 per million input tokens for it. TypeSafe's Jev, the model Cloudflare measures itself against, publishes $0.042.
AI
11 min read
Gemini 4 Argon vs GPT-6 Astra, the one you can't buy
Google announced Argon on 30 September at a fifth of Astra's price for an introductory period. It has no row on Google's own pricing page, and its only door is a program with 650 partners.
AI
11 min read
Best open source AI model in 2026, ranked by its license
Xiaomi published MiMo V2.6 on Monday under a plain MIT license, and an independent ranking already puts it first among open models. Every license below was read at its source.
The weekly
The week in AI, every Tuesday
The story everyone read at the top, the ones you missed below. One email a week, on Tuesday morning.