# AI Round-up: May 29, 2026

## Summary

Anthropic dominated the snapshot: it announced a $65B Series H at a $965B post-money valuation, said run-rate revenue crossed $47B, and pushed Claude Opus 4.8 into GitHub Copilot, Perplexity, Microsoft 365 and Databricks workflows. Reddit echoed the valuation story alongside Codex safety and Claude Code audit discussions, while YouTube centred on Opus 4.8 and long-running coding tasks.

The rest of the day was a tooling push. Microsoft launched Microsoft 365 Business with Copilot and a redesigned Copilot app, Mistral introduced Search Toolkit and Vibe Agent while joining Copilot Studio, OpenAI published Endava's Codex organisation story and its Frontier Governance Framework, Replit launched Canvas, xAI updated Grok Build, and security threads covered fake Codex malware and typosquatted npm packages.

## Top three signals

- [Anthropic's $965B raise](<https://www.anthropic.com/news/series-h>) (News)
- [Claude Opus 4.8 rollout](<https://www.anthropic.com/news/claude-opus-4-8>) (News)
- [Microsoft Copilot small-business push](<https://www.microsoft.com/en-us/microsoft-365/blog/2026/05/28/introducing-microsoft-365-business-with-copilot-the-new-standard-for-small-business/>) (News)

## Metadata

- Slug: 2026-05-29
- Date: 2026-05-29
- Published: 2026-05-29T08:07:25Z
- Since: 2026-05-28T05:33:12Z
- Range: Last 7 days
- Lead signal: Anthropic's $965B raise
- Topics: Anthropic, Microsoft / Copilot, Codex, Funding and deals, AI coding tools
- Total signals: 40
- HTML: <https://www.ai-roundup.dev/roundup/2026-05-29/>
- JSON: <https://www.ai-roundup.dev/roundup/2026-05-29.json>
- Markdown: <https://www.ai-roundup.dev/roundup/2026-05-29.md>

## News / Articles (10)

1. Anthropic raises $65B in Series H funding at $965B post-money valuation
   - URL: <https://www.anthropic.com/news/series-h>
   - Source: Anthropic
   - Published: 2026-05-28T18:15:01Z

2. Introducing Claude Opus 4.8
   - URL: <https://www.anthropic.com/news/claude-opus-4-8>
   - Source: Anthropic
   - Published: 2026-05-28T16:51:43Z

3. Introducing Microsoft 365 Business with Copilot: The new standard for small business
   - URL: <https://www.microsoft.com/en-us/microsoft-365/blog/2026/05/28/introducing-microsoft-365-business-with-copilot-the-new-standard-for-small-business/>
   - Source: Microsoft
   - Published: 2026-05-28T19:00:00Z

4. Introducing Search Toolkit
   - URL: <https://mistral.ai/news/search-toolkit/>
   - Source: Mistral AI
   - Published: 2026-05-28T12:43:09Z

5. How Endava builds an agentic organization with Codex
   - URL: <https://openai.com/index/endava>
   - Source: OpenAI
   - Published: 2026-05-29T00:16:14Z

6. Introducing a new design for Microsoft 365 Copilot
   - URL: <https://www.microsoft.com/en-us/microsoft-365/blog/2026/05/28/introducing-a-new-design-for-microsoft-365-copilot/>
   - Source: Microsoft
   - Published: 2026-05-28T15:00:00Z

7. OpenAI’s Frontier Governance Framework
   - URL: <https://openai.com/index/openai-frontier-governance-framework/>
   - Source: OpenAI
   - Published: 2026-05-28T16:26:55Z

8. Vibe gets to work.
   - URL: <https://mistral.ai/news/vibe-agent/>
   - Source: Mistral AI
   - Published: 2026-05-28T12:41:04Z

9. Typosquatted npm packages used to steal cloud and CI/CD secrets
   - URL: <https://www.microsoft.com/en-us/security/blog/2026/05/28/typosquatted-npm-packages-used-steal-cloud-ci-cd-secrets/>
   - Source: Microsoft
   - Published: 2026-05-29T04:45:03Z

10. Mistral joins Copilot Studio’s growing lineup of model providers
   - URL: <https://www.microsoft.com/en-us/microsoft-copilot/blog/copilot-studio/mistral-joins-copilot-studios-growing-lineup-of-model-providers/>
   - Source: Microsoft
   - Published: 2026-05-28T08:45:00Z
## YouTube (10)

1. Embrace long-running tasks with Opus 4.8 and Claude Code
   - URL: <https://www.youtube.com/watch?v=5HVPeux24WU>
   - Channel: Claude
   - Published: 2026-05-28T16:49:38Z
   - Views: 82,012

2. Claude Opus 4.8 actually blew my mind...
   - URL: <https://www.youtube.com/watch?v=j-oiGiIEcws>
   - Channel: Alex Finn
   - Published: 2026-05-28T18:41:13Z
   - Views: 43,758

3. Vibe Coding With Claude Opus 4.8
   - URL: <https://www.youtube.com/watch?v=DX4HERWHCbA>
   - Channel: BridgeMind
   - Published: 2026-05-28T22:21:06Z
   - Views: 28,591

4. Can Cursor's HARDCORE Review Skill Stop The Slop?
   - URL: <https://www.youtube.com/watch?v=mh5XZ-L5SFQ>
   - Channel: Matt Pocock
   - Published: 2026-05-28T14:00:25Z
   - Views: 23,166

5. A Cursor Agent Wiped a Database in 9 Seconds. Agent Analytics Would Have Seen It Coming.
   - URL: <https://www.youtube.com/watch?v=n0nC1kmztSk>
   - Channel: AI News & Strategy Daily | Nate B Jones
   - Published: 2026-05-28T14:00:28Z
   - Views: 13,584

6. Claude Opus 4.8: Here is Everything that Changed
   - URL: <https://www.youtube.com/watch?v=NbhNlpRsofY>
   - Channel: Prompt Engineering
   - Published: 2026-05-28T19:04:41Z
   - Views: 13,209

7. Googles New Statement On AGI Just Stunned Everyone
   - URL: <https://www.youtube.com/watch?v=ahhThdwhQUU>
   - Channel: TheAIGRID
   - Published: 2026-05-28T08:45:18Z
   - Views: 14,233

8. Elon and xAI Solve the Next AI Bottleneck
   - URL: <https://www.youtube.com/watch?v=Bro-jD8tzeo>
   - Channel: Dr. Know-it-all Knows it all
   - Published: 2026-05-28T13:38:35Z
   - Views: 10,502

9. Why Demis Hassabis, the “good” AI CEO, can’t prioritize safety
   - URL: <https://www.youtube.com/watch?v=xEWf5xWNMiY>
   - Channel: On with Kara Swisher
   - Published: 2026-05-28T20:44:23Z
   - Views: 6,832

10. Codex 4.0 (CRAZY NEW UPGRADES): THIS IS INSANITY!
   - URL: <https://www.youtube.com/watch?v=JA7A4CwwdFw>
   - Channel: AICodeKing
   - Published: 2026-05-28T11:02:53Z
   - Views: 5,917
## Reddit (10)

1. Anthropic soars to $965bn valuation, leapfrogging OpenAI
   - URL: <https://www.reddit.com/r/technology/comments/1tqtglc/anthropic_soars_to_965bn_valuation_leapfrogging/>
   - Subreddit: r/technology
   - Published: 2026-05-29T06:41:51Z
   - Score: 0
   - Comments: 5

2. First thing you see when Googling "OpenAI Codex app" is a fake malware website
   - URL: <https://www.reddit.com/r/OpenAI/comments/1tq4cql/first_thing_you_see_when_googling_openai_codex/>
   - Subreddit: r/OpenAI
   - Published: 2026-05-28T13:54:37Z
   - Score: 0
   - Comments: 72

3. If Copilot is becoming token-based billing, all paid plans should get access to all models
   - URL: <https://www.reddit.com/r/GithubCopilot/comments/1tqrhtp/if_copilot_is_becoming_tokenbased_billing_all/>
   - Subreddit: r/GithubCopilot
   - Published: 2026-05-29T04:58:42Z
   - Score: 0
   - Comments: 14

4. Built a multi-dimensional code audit skill for Claude Code — open source, ships with playbooks that caught a CVSS 8.0 XSS in production
   - URL: <https://www.reddit.com/r/ClaudeAI/comments/1tqtz2l/built_a_multidimensional_code_audit_skill_for/>
   - Subreddit: r/ClaudeAI
   - Published: 2026-05-29T07:09:39Z
   - Score: 0
   - Comments: 3

5. How are non-engineers actually using Codex in daily work?
   - URL: <https://www.reddit.com/r/ChatGPT/comments/1tqtytz/how_are_nonengineers_actually_using_codex_in/>
   - Subreddit: r/ChatGPT
   - Published: 2026-05-29T07:09:16Z
   - Score: 0
   - Comments: 3

6. Everyone is tracking the wrong thing about AI progress in 2026. The benchmark wars matter less than what's happening one layer underneath them.
   - URL: <https://www.reddit.com/r/ArtificialInteligence/comments/1tqtdhg/everyone_is_tracking_the_wrong_thing_about_ai/>
   - Subreddit: r/ArtificialInteligence
   - Published: 2026-05-29T06:37:02Z
   - Score: 0
   - Comments: 2

7. CNN Files Latest News Copyright Suit Against Perplexity AI
   - URL: <https://www.reddit.com/r/ArtificialInteligence/comments/1tqbr4w/cnn_files_latest_news_copyright_suit_against/>
   - Subreddit: r/ArtificialInteligence
   - Published: 2026-05-28T18:19:04Z
   - Score: 0
   - Comments: 2

8. 🤖 Developers alarmed by autonomy of Anthropic’s new Claude Code assistant
   - URL: <https://www.reddit.com/r/ArtificialInteligence/comments/1tqsqbd/developers_alarmed_by_autonomy_of_anthropics_new/>
   - Subreddit: r/ArtificialInteligence
   - Published: 2026-05-29T06:02:04Z
   - Score: 0
   - Comments: 1

9. Article on how Anthropic approaches the hiring process
   - URL: <https://www.reddit.com/r/claudexplorers/comments/1tqqlz1/article_on_how_anthropic_approaches_the_hiring/>
   - Subreddit: r/claudexplorers
   - Published: 2026-05-29T04:14:50Z
   - Score: 0
   - Comments: 1

10. Codex memory across sessions - I extracted Hermes Agent's memory into a standalone MCP server
   - URL: <https://www.reddit.com/r/OpenaiCodex/comments/1tq4hjb/codex_memory_across_sessions_i_extracted_hermes/>
   - Subreddit: r/OpenaiCodex
   - Published: 2026-05-28T13:59:38Z
   - Score: 0
   - Comments: 1
## X / Twitter (10)

1. We've raised $65 billion in Series H funding at a $965 billion post-money valuation, led by @AltimeterCap, Dragoneer, @Greenoaks, and @sequoia. This investment will help us advance our research and expand our capacity to meet growing demand for Claude.
   - URL: <https://x.com/AnthropicAI/status/2060061347522433422>
   - Handle: @AnthropicAI
   - Published: 2026-05-28T18:11:13Z
   - Views: 4,832,572
   - Likes: 19,080

2. Earlier this month, our run-rate revenue crossed $47 billion.  This growth has been driven by organizations across many industries deploying Claude in their core operations, and by a growing number of people using it for their everyday work. Read more: https://t.co/V1fdqOxQdY
   - URL: <https://x.com/AnthropicAI/status/2060061348818518493>
   - Handle: @AnthropicAI
   - Published: 2026-05-28T18:11:14Z
   - Views: 417,472
   - Likes: 1,379

3. 🆕 @AnthropicAI's Claude Opus 4.8 is now generally available and rolling out in GitHub Copilot. Early testing shows: • It demonstrates a clear step forward in code understanding and generation across a range of real-world coding tasks. • It handles complex problem-solving and https://t.co/dMkLFeEtNp
   - URL: <https://x.com/github/status/2060050235754242178>
   - Handle: @github
   - Published: 2026-05-28T17:27:04Z
   - Views: 114,613
   - Likes: 834

4. Claude Opus 4.8 is now available for Max subscribers on Perplexity and Computer. https://t.co/DNDNo0Iqxj
   - URL: <https://x.com/perplexity_ai/status/2060049662044962858>
   - Handle: @perplexity_ai
   - Published: 2026-05-28T17:24:47Z
   - Views: 200,171
   - Likes: 893

5. May means more models.   Today we're introducing Anthropic's Claude Opus 4.8, available now in Copilot Cowork (Frontier) and rolling out to Copilot Chat, Excel, PowerPoint, and Copilot Studio early release cycle environments.
   - URL: <https://x.com/Microsoft365/status/2060118416959168963>
   - Handle: @Microsoft365
   - Published: 2026-05-28T21:58:00Z
   - Views: 5,692
   - Likes: 102

6. The best design work doesn't happen in a chat box. You need space to explore ideas, create variants, and iterate Meet the new Replit Canvas Your agentic design tool to build beautiful websites,  apps, marketing assets and more https://t.co/GYBwurrpW7
   - URL: <https://x.com/Replit/status/2060097656207413613>
   - Handle: @Replit
   - Published: 2026-05-28T20:35:30Z
   - Views: 705,063
   - Likes: 364

7. Grok Build 0.2.7 is now out, with /usage, /login, shared terminals across subagents, and improved image understanding See all updates at https://t.co/G6Q2RYPrmx https://t.co/2hxC9Y4o9d
   - URL: <https://x.com/xai/status/2060102590122385460>
   - Handle: @xai
   - Published: 2026-05-28T20:55:06Z
   - Views: 175,589
   - Likes: 1,628

8. Perplexity Computer is now available inside Microsoft Excel, Word, PowerPoint, and Outlook. Orchestrate across work with Computer directly in the side panel of your app to draft documents, model, build decks, and handle email. Available now: https://t.co/0itt5XcFRX https://t.co/oHf90rP4Xv
   - URL: <https://x.com/perplexity_ai/status/2060013442720010598>
   - Handle: @perplexity_ai
   - Published: 2026-05-28T15:00:52Z
   - Views: 75,520
   - Likes: 624

9. The Microsoft 365 Copilot app just got a redesign. Cleaner. Faster. And designed to move with how you actually work. See what’s new: https://t.co/Zj8cqLqvpd https://t.co/QLvxEgOyC6
   - URL: <https://x.com/Microsoft365/status/2060031309053862022>
   - Handle: @Microsoft365
   - Published: 2026-05-28T16:11:52Z
   - Views: 25,360
   - Likes: 442

10. Running a small business means doing a little bit of everything. Microsoft 365 Business with Copilot brings your apps, AI, and data together. So you can move faster, stay organized, and keep everything in one place. Explore what’s coming: https://t.co/j0xWLrsbZi https://t.co/6tabMLNzfu
   - URL: <https://x.com/Microsoft365/status/2060088746792321199>
   - Handle: @Microsoft365
   - Published: 2026-05-28T20:00:06Z
   - Views: 2,093
   - Likes: 30