> For the complete documentation index, see [llms.txt](https://docs.agenticflow.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.agenticflow.ai/changelog/office-hour-28-gpt-5-1-series-gemini-3-pro-preview-skills-deep-dive.md).

# Office Hour #28: GPT-5.1 Series + Gemini 3 Pro Preview + Skills Deep Dive

Published November 22nd, 2025. This historical recap summarizes product updates, demos, and builder-facing improvements from the session.

## Recording

{% embed url="<https://www.youtube.com/watch?v=TmdJlAR3Esg>" %}

### GPT-5.1 Series Now Available

* GPT-5.1, Codex & Codex Mini
* Adaptive thinking levels
* Top benchmark performance (\~70 score)
* Outperforms o1
* Configurable thinking/effort levels (balance speed vs thoroughness)

### Gemini 3 Pro Preview

* Currently topping AI leaderboard

### Skills Feature Deep Dive

* Works with ALL models (GPT, Claude, Gemini, etc.) - not just Claude!
* Portable, reusable workflows
* Stored in AI Drive
* Dynamic context loading (only loads when needed)
* Cross-conversation and cross-agent functionality
* Combine multiple skills in one agent

### Skills vs System Prompts vs MCP

* Detailed comparison based on Anthropic blog
* When to use each approach
* Best practices for implementation

## Demonstrations

* Travel Planner skill - real-world itinerary generation
* Skills working across different models
* Dynamic skill loading and management

## Support

For reproducible product issues, email <support@agenticflow.ai> with workspace context, affected agent/workflow/template details, screenshots or screen recording, and steps to reproduce.