Karim Mattar

Research Associate @ARKInvest | AI, Cloud & Semis | Research x Automation | Disclosure:

[Karim Mattar @MattarARK]

Give this a read and let me know your thoughts! Let’s talk about it 💬

Planning to get my hands on Grok @bot soon and can’t imagine what @grok 4.7 is going to be like. These intelligent yet cost efficient models are challenging the front line. Let’s see how others respond.

[ARK Invest @ARKInvest]

Last week, @SpaceXAI released Grok 4.6, its new frontier model designed for coding, agentic tasks, and knowledge work.

Independent evaluations suggest that SpaceXAI has returned to the AI frontier competition based on both performance and cost.

The economics of Grok 4.6 seem particularly compelling for AI agents. Artificial Analysis estimates that Grok 4.6 costs $0.84 per task on its Intelligence Index, placing it on the Pareto frontier for intelligence-versus-cost.

More from @MattarARK in this week's newsletter ⬇️

[Karim Mattar @MattarARK]

If you iMessage me just know who’s answering

[ChatGPT @ChatGPT]

Everyday conversations just got easier with the new Apple Messages plugin.

Search messages, catch up on conversations, draft and send replies—all with ChatGPT on your Mac.

Now available in ChatGPT Work and Codex on desktop.

[Karim Mattar @MattarARK]

A really big month for models. I hope everyone is as excited as I am. Stay tuned to learn best practices and use cases for each of them as they release.

[Bindu Reddy @bindureddy]

Models dropping in the next few weeks

Fable 5.1
Astra / GPT 6
Grok 4.7
Kimi 3.5

Astra is a step change and will likely put OpenAI ahead of Anthropic

[Claude @claudeai]

Claude Academy is now live.

Whether you're figuring out what AI is or already using Claude every day, there's a path that meets you where you are. The courses and tutorials are free and open to anyone at https://t.co/WRiSRAvK6l

[Karim Mattar @MattarARK]

Moving from the chat window into Slack directly, where work actually happens. AI may not replace enterprise software, but it could become the intelligence layer running behind it.

Watch platforms that own workflow, data, and distribution, that's where AI agents can create real economic leverage.

[Slack @SlackHQ]

Now building is a team sport.

Introducing Slack Code: a new way for your team and AI agents, like @AnthropicAI's Claude Code, Claude Tag, Devin from @cognition, @github Copilot, @ChatGPT, and @vercel agents, to write, review, and ship code together.

Just mention an agent to spin up a channel, pull in your team, and start building. All in the open. All in Slack.

[ARK Invest @ARKInvest]

An AI agent was told to grab a spot in a gym class. It found a way nobody saw coming. @skorusARK explains what "aligned to the user" really means when an agent takes it literally.

[Karim Mattar @MattarARK]

And cut your token usage while at it.

[ClaudeDevs @ClaudeDevs]

You can now set Claude Code's output style to Concise.

Claude leads with the result, keeps responses short, and still gives full detail when you ask.

Turn it on in /config → Output style, or set "outputStyle": "Concise" in settings.json.

[Karim Mattar @MattarARK]

Thank you, Cathie! Learning more from you and the team than I could have ever imagined.

[Cathie Wood @CathieDWood]

Welcome to @ARKInvest, Karim. I have learned so much about AI models from you already!

[Karim Mattar @MattarARK]

A major upgrade to Grok 4.6? Keep your eyes peeled. Seems this is only the beginning!

My experience developing with Grok 4.6 has been brilliant so far. A truly reliable model. No repeating yourself, ability to complete multiple tasks sequentially, and no stopping every 5 seconds to ask a question.

[Elon Musk @elonmusk]

Try Grok 4.6!

Grok 4.7, which is a major upgrade, is coming soon.

[Karim Mattar @MattarARK]

This is a great read to start your day. If you’re a dev, you’d appreciate this.

[Cursor @cursor_ai]

We're making Git hosting more reliable, performant, and scalable.

This post traces 20 years of Git infrastructure and explains how that history led us to design and operate our Git storage, Origin, as if it were a database.

https://t.co/UW7jHuItSX

[Karim Mattar @MattarARK]

This is unreal.

[Frank Downing @downingARK]

Great slide from $CBRS Supernova event tonight. At 750 tokens per second, GPT 5.6 Sol Ultrafast is in a league of its own. There is nothing close.

[Karim Mattar @MattarARK]

Starting off my new series: Tip Tuesday!

AI tip: Don’t just ask AI for an answer, give it a role, context, and a clear output format.

Instead of:
“Summarize this report.”

Try:
“You’re an investment analyst. Summarize this report in 5 bullets: key takeaways, risks, opportunities, important numbers, and what to watch next.”

Better inputs → better outputs. Small prompt changes compound quickly, especially when work grows across multiple sessions.

Bonus: finish off the prompt by saying, “ask me questions so that we can get on the same page.” These questions are sneakily helping the model think about things it would have missed, not actually for you.

We’ll hit a wide range of tips, some days will be more advanced, others will be quite basic. Stay tuned!

[Karim Mattar @MattarARK]

@atarsin @ARKInvest Thank you! Stay tuned 😉

[Karim Mattar @MattarARK]

First ever X post!

Recently joined @ARKInvest as a research associate, focused on AI, cloud, and semiconductors.

As someone hands on with the latest tools, I’ll be sharing what I’m learning across the AI stack, different use cases, and some tips and tricks along the way.

Stay tuned for anything related to compute and infrastructure to models, applications, and the companies building them.

Lots to learn, lots to share. Excited to get going!

[Karim Mattar @MattarARK]

@BrianRoemmele @ARKInvest Same to you mate! Looking forward to the next one.

[Karim Mattar @MattarARK]

This may be a pivotal time in the world of AI. Spent my weekend building with Grok 4.6 and can attest to its capabilities. Being both smart and cost efficient, I see the new wave of less costly models making their way to the top of the intelligence scales, challenging others.

[ARK Invest @ARKInvest]

https://t.co/L9Sj2tYISi