OpenAI’s GPT-5 Codex

What we’ll cover today:

💻 OpenAI’s Codex thinks for hours on code

🤖 YC’s Rulebase automates fintech’s boring back office

🇨🇳 China just slapped Nvidia with antitrust heat

🛠️ 4 tools + resources to level up your AI game

OpenAI’s New GPT-5 Codex 💻

• OpenAI released GPT-5 Codex, a coding model that can work for seconds or up to 7 hours on a single task.

• It performs better than regular GPT-5 on bug fixes and code cleanup benchmarks.

• Codex is now available in ChatGPT, GitHub, IDEs, and terminals for Plus and Enterprise users.

• OpenAI is betting on depth and accuracy in coding, not speed alone.

FROM OUR FOUNDER…

The Smartest Way to Grow Your Newsletter 🚀

Tired of low-quality subs and wasted ad spend? I’ve scaled AI, fintech, SaaS, and multiple niche specific newsletters with real, engaged and high intent subscribers. Would love to do the same for you!

✅ 40%+ open rates: no bots, no junk leads.
✅ No ad management fees: just pay per engaged subscriber.
✅ First-party data & proprietary methods ensure quality.
✅ Risk-free scaling: we’ve built and grown newsletters ourselves.

📩 Want high-intent subscribers that actually engage? Let’s talk.

Rulebase Raises $2.1M for Fintech Back Office 🤖

• YC-backed Rulebase automates bank tasks like compliance, quality checks, and dispute handling.

• It reviews 100% of customer interactions instead of the 3–5% that humans typically handle.

• Customers like Rho have cut costs by 70% and escalations by 30%.

• The startup is focusing on precise back office automation rather than flashy customer-facing AI.

China Targets Nvidia on Antitrust 🇨🇳

• China ruled that Nvidia’s $7B Mellanox acquisition in 2020 violated antitrust rules.

• No penalty has been announced yet, but the move comes during tense trade talks.

• U.S. export policies on AI chips keep shifting, creating uncertainty in the market.

• The ruling is more about political leverage in the chip war than about Mellanox itself.

🛠️ TOOLS

💻 Blocks – Build smart work apps + AI agents. →
📅 Cal.ai – AI agents that schedule through natural calls. →
⚡ Slashit – Reply faster with snippets and AI commands. →
📈 SnowSEO – All-in-one AI SEO and GEO platform. →

📚 RESOURCES

🎥 Intro to Agentic Workflow – how workflows actually get work done. →
💰 9 AI Skills for 2025 – Skills that can make you rich this year. →
🧠 Stanford’s Guide to AI Productivity – Practical steps to 10x your AI output. →
⚙️ 2025 Productivity System – Entrepreneur framework to run life + business. →

📚 Claude Just Became the Best AI for Work

Claude just leveled up big time. From smarter file handling to voice mode, AirPods AI, and even 3D models… this video shows all the new tricks. You should watch because it explains exactly how AI is moving from cool demos to actual daily work.

Watch the full breakdown here →