AI's December Sprint: o3, Gemini Thinking, and the Tools That Changed Everything
December ended with the biggest AI sprint of 2024. OpenAI announced o3: a reasoning model that scored near-perfect on graduate math and outperformed every benchmark before it on science questions. Google responded the next day with Gemini 2.
What matters today
December ended with the biggest AI sprint of 2024. OpenAI announced o3: a reasoning model that scored near-perfect on graduate math and outperformed every benchmark before it on science questions.
Welcome byte
This issue gives executives a clean scan of AI's December Sprint: o3, Gemini Thinking, and the Tools That Changed Everything. Start with the quick hits, then use the companion guides for the workflows worth testing this week.
Quick Hits
OpenAI Announces o3: The Strongest Reasoning Model Yet
OpenAI closed out 2024 by announcing o3 on December 20: its most capable reasoning model, scoring 87.7% on graduate-level science questions and 96.7% on the hardest 2024 math competition problems. Read more
Google Gemini 2.0 Flash Thinking Experimental Available Free
Google released Gemini 2.0 Flash Thinking Experimental on December 19: a reasoning model available free in Google AI Studio that shows its step-by-step logic process before delivering a final answer, and ranked #1 on the global AI leaderboard at launch. Read more
ChatGPT Projects Now Live for All Plans
OpenAI launched Projects for all ChatGPT users on December 13: letting you group conversations, files, and custom instructions into named workspaces. Free users get 5 file uploads per project; Plus users get 25. Read more
ChatGPT Canvas Goes Free for All Users
OpenAI made Canvas: its collaborative document editor with live Python execution: available to all users including the Free tier on December 10. Read more
Apple Intelligence iOS 18.2: ChatGPT Now Lives Inside Siri
Apple released iOS 18.2 on December 11 for iPhone 15 Pro and iPhone 16, adding ChatGPT integration into Siri and all Writing Tools: meaning Siri can now route complex requests directly to ChatGPT and return the answer. Read more
Top AI Updates
1. OpenAI o3: The Reasoning Model That Changes What Executives Can Delegate in 2025
What makes o3 genuinely different from GPT-4o and o1, and why it matters for business use.
2. Gemini 2.0 Flash Thinking: The First AI That Shows Its Work, And Why That Matters for Regulated Industries
What makes Flash Thinking structurally different from every standard LLM before it
3. ChatGPT Projects: How to Build Persistent AI Workspaces That Actually Remember Your Business
Why the "re-briefing tax" is the biggest hidden cost in how most executives use ChatGPT
Pro Tip
Modern LLMs now boast context windows exceeding 100k tokens. However, simply dumping a massive PDF into a prompt rarely yields high-quality results.
Action items:
- Copy the prompt or framework into ChatGPT, Claude, or Gemini.
- Test Mastering Context Windows: The Art of Long-Form Prompting on one live decision, document, or meeting artifact.
- Save the best version as a reusable team template.
Copy-ready guide Mastering Context Windows: The Art of Long-Form Prompting
Productivity Gem
Why most executives lose 30-45 minutes every Monday to unstructured orientation work
Action items:
- Choose one recurring workflow with a clear before and after.
- Run the Build a Self-Refreshing Monday Morning Briefing Inside ChatGPT Projects workflow once with real work, not sample data.
- Keep it only if it saves at least 30 minutes this week.
Put it to work Build a Self-Refreshing Monday Morning Briefing Inside ChatGPT Projects
Health Tip
Why year-end wearable data is the most valuable health input most people never use
This information is for educational purposes only and is not medical advice. Please consult a qualified healthcare professional before making changes to your health routine.
Step-by-step guide 90-Day Health Roadmap: Feed Your Wearable Year-End Data Into ChatGPT and Get a Prioritized Plan
Kids Tip
Kids create a hands-on AI project: Mastering Context Windows: The Art of Prompt Compression. A parent or educator helps them build, test, and explain what the AI tool gets right and wrong.
Try the activity Mastering Context Windows: The Art of Prompt Compression
Wrap Up
Pick one workflow from this issue, run it with real work, and keep the result only if it makes the next decision clearer or faster.
About the author
Pierre has spent 25+ years building growth systems across fintech, real estate, lending, campaigns, and AI workflows, with $1.5B+ in client value delivered.
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