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Microsoft Copilot adds track changes, comment management to Word for legal and compliance workflows

Microsoft has added track changes monitoring, comment management, and table of contents insertion to Copilot in Word. The features run on Microsoft's "Work IQ" adaptation layer and are currently available only through the Office Insiders Beta Channel Frontier program on Windows.

April 15, 2026

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benchmarkOpenAI

OpenAI GPT-5.4 Pro reportedly solves Erdős problem #1196 in 80 minutes, reveals novel mathematical connection

OpenAI's GPT-5.4 Pro model has reportedly solved Erdős open problem #1196 in approximately 80 minutes, with another 30 minutes to format the solution as a LaTeX paper. Mathematician Terence Tao notes the solution reveals a previously undescribed connection between integer anatomy and Markov process theory.

2 min readvia the-decoder.com
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model releaseOpenAI

OpenAI releases GPT-5.4-Cyber, a cybersecurity-focused model limited to verified security professionals

OpenAI has released GPT-5.4-Cyber, a fine-tuned variant of GPT-5.4 built for defensive cybersecurity work including binary reverse engineering. Access is initially restricted to a few hundred verified security professionals, with expansion planned to thousands of individuals and hundreds of teams in coming weeks.

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model releaseOpenAI

OpenAI releases GPT-5.4-Cyber, a fine-tuned model for vetted cybersecurity defenders with binary reverse engineering cap

OpenAI announced GPT-5.4-Cyber, a variant of GPT-5.4 fine-tuned for defensive cybersecurity work. The model features binary reverse engineering capabilities and reduced safety restrictions, but access is limited to authenticated security professionals through the company's Trusted Access for Cyber program.

2 min readvia 9to5mac.com
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model releaseOpenAI

OpenAI releases GPT-5.4-Cyber with tiered access verification system for cybersecurity work

OpenAI released GPT-5.4-Cyber, a model variant designed for defensive cybersecurity tasks with fewer restrictions on dual-use queries. Access is controlled through a tiered verification system in the Trusted Access for Cyber program, targeting thousands of vetted users compared to Anthropic's 40-organization Mythos Preview rollout.

2 min readvia axios.com
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analysisAnthropic

UK AI Safety Institute confirms Claude Mythos finds more exploits as token spend increases

The UK's AI Safety Institute published an independent evaluation confirming Anthropic's Claude Mythos is highly effective at finding security vulnerabilities. The evaluation revealed a linear relationship: more tokens spent equals more exploits discovered, transforming security into an economic arms race.

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product update

Google Home April 2026 update reduces Gemini interruptions, improves speech recognition in noisy environments

Google Home's April 2026 update addresses Gemini voice assistant reliability issues. The update improves speech detection to reduce mid-sentence interruptions, speeds up responses to simple queries, and enhances music playlist recognition even when names are misspoken or in noisy environments.

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