AI News Summary - Week 45, 2026

Microsoft, Alphabet and Amazon show investors the cash cost of AI, Anthropic publishes its IPO prospectus and plans a record Japanese offering, Mistral opens Large 4 as Canada buys into Cohere, Apple brings Apple Intelligence to China on Alibaba's Qwen, and Anthropic's watermark retrofit tests the EU's December deadline.

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AI News Summary — Week 45, 2026

This week in AI, covering 27 October to 2 November: Microsoft, Alphabet and Amazon reported, and the market cared more about capex than revenue. Anthropic published its IPO prospectus and filed for a record Japanese offering. Mistral opened the weights of Large 4 while Canada took a stake in Cohere. Apple confirmed Apple Intelligence for China, running on Alibaba's Qwen. And a month before an EU AI Act deadline, Anthropic's watermark retrofit for older Claude models arrived with a caveat.

Big Tech's AI bill meets the earnings calendar

Microsoft and Alphabet reported on 28 October, Amazon a day later. Demand was not the problem: Azure grew 48 percent, and AWS grew 39 percent to $46.0 billion, its fastest pace in nearly five years. Cash was.

Microsoft's capital spending came in at $45.2 billion against an expected $50.7 billion, and it trimmed its fiscal-year forecast from $175 billion to $170 billion. CFO Amy Hood blamed delays at third-party AI chip suppliers. Alphabet spent $51.4 billion, held its $195–205 billion guidance and said spending will rise significantly in 2027. It also posted a second straight quarter of negative free cash flow, about $9 billion, and its shares fell roughly 12 percent the next day. Amazon kept its 2026 estimate at about $220 billion after a $75.9 billion quarter, and Andy Jassy said it will spend "meaningfully more in 2027".

Key details:

  • Microsoft fiscal first-quarter revenue: $92.3 billion, up 19 percent.
  • Amazon third-quarter revenue: $201.9 billion, up 12 percent; shares fell nearly 7 percent after hours on a soft holiday outlook.

Why it matters: the hyperscalers are still accelerating, but the market now grades them on free cash flow rather than ambition.

Anthropic publishes its prospectus and goes to Japan

Anthropic filed its S-1 publicly on 26 October, applying to list on the Nasdaq Global Select Market under the ticker ANT, with Goldman Sachs and Morgan Stanley as underwriters. After the Public Benefit Fund news in week 43, this is the first full look at the numbers. Share count and price range are still blank.

First-half 2026 revenue was $16.3 billion, up from $1.2 billion a year earlier. The operating loss narrowed to $693 million. The headline net loss of $80.7 billion is mostly a $72.4 billion non-cash charge from revaluing convertible notes and other instruments as the company's valuation rose.

On 2 November Anthropic filed with Japan's Kanto Local Finance Bureau for a domestic offering of up to $3.5 billion, led by Mizuho Securities. Nikkei Asia reports it would be the largest amount raised in Japan by a foreign company's IPO, about 60 percent more than SpaceX raised there in June.

Key details:

  • More than 1,900 customers each generated at least $1 million in the twelve months to 30 September.
  • The prospectus warns that revenue growth may not be sustainable.
  • Compute and infrastructure cost almost $9 billion in the half.

Why it matters: frontier-lab economics are now public, and the first set shows a business near operating break-even.

Sovereignty, two ways: Mistral Large 4 and Canada's Cohere stake

Mistral released the weights of Mistral Large 4 on 29 October, three weeks after a public preview. It is a mixture-of-experts model with roughly one trillion parameters, about 52 billion active, on Hugging Face and Mistral's API. The pitch is defensive security: Mistral says it matches China's GLM-5.3 on cyber work while using 47 percent fewer tokens per task. Pierre Stock, Mistral's VP of Science, told TechCrunch that open weights mean "access that can't be cut off by definition".

The same day, Prime Minister Mark Carney announced that Canada will invest up to C$1.6 billion for an equity stake in Cohere, paid in stages. It sits inside a Series E targeting up to C$7 billion at a C$35.7 billion valuation, led by Germany's Schwarz Group.

Key details:

  • Mistral also claims Large 4 tops open models on Artificial Analysis' Coding Agent Index; the benchmarks are self-reported.
  • Cohere must stay headquartered in Canada and invest at least C$1.7 billion in Canadian compute by 2030.

Why it matters: buyers outside the US and China are paying for AI they can control, either by owning the weights or owning part of the company.

Apple Intelligence reaches China, running on Qwen

Apple's China newsroom confirmed on 31 October that the first Apple Intelligence features are coming to mainland China. Testing starts with the iOS developer beta on 4 November, and the public release follows with iOS 27.3 in December. Siri, Writing Tools and Visual Intelligence can hand requests to Alibaba's Qwen.

The Qwen integration is opt-in, and Apple asks before sending a question, document or image. Alibaba says it will not use requests or responses for model training. The redesigned Siri announced at WWDC is not included, and MacRumors reports that Image Playground is missing too.

Key details:

  • China's Cyberspace Administration cleared the service in July, two years after Apple Intelligence launched elsewhere.
  • Qwen takes the role ChatGPT plays in other markets.
  • Future model updates in China will also need regulatory approval, according to Bloomberg.

Why it matters: Apple has accepted different model partners per market, which looks like the template for any global AI product sold in China.

Anthropic's watermark retrofit, and the EU's December deadline

Under the AI Act's amended timeline, generative AI systems already on the market before 2 August 2026 have until 2 December to meet Article 50(2), which requires machine-readable marking of AI-generated content. Fines can reach €15 million or 3 percent of global turnover.

In an email to API customers on 31 October, Anthropic said it would start applying its text watermark to Claude Mythos 5, Opus 4.7, Opus 4.6 and Sonnet 4.6 from 3 November, with Amazon Bedrock following a few days later. Newer models have carried the mark since August. The caveat, first reported by The Decoder: on Opus 4.6 and Sonnet 4.6 the watermark only works when temperature, top_p and top_k stay at their defaults. Change any one and the output is unmarked, with no error.

Key details:

  • Anthropic advises customers who rely on the watermark for compliance to keep those settings at their defaults.
  • The detection API is still in private preview.
  • The Code of Practice does not address sampling settings, so regulators' view of a conditional mark is unknown.

Why it matters: Article 50 compliance is arriving as configuration detail, and teams running older models with tuned parameters should check their output is still marked.

Previous week: AI News Summary - Week 44.1, 2026

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