Philipp Schmid

The Interactions API is now generally available. 🎉 The Interactions API is the simplest way to build with Gemini for humans and agents.

- One API for Gemini models and agents.
- Antigravity Agent with a isolated remote Linux sandbox.
- Image gen with Nano Banana; music with Lyria 3, soon video with Omni.
- `background=True` for async, long-running interactions.
- Multimodal Tool Use & Combination.
- Dedicated skills for coding agent.

Building something new inside Google isn't easy, but it's possible. We spent almost a year on this because we think developers and agents deserve an API that is intuitive, familiar and easy to learn and use and evolves with improving capabilities and new behaviors.

Give it a try. Feature requests, bugs, complaints all to me. 👇🏻

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Evaluations are the backbone of any frontier progress. Today we're launching MKA (Multimodal Knowledge Agent) with @ArtificialAnlys, a benchmark for agents doing knowledge work on visually complex files.

- 200 tasks across 10 verticals and 83 occupations, written by domain experts
- Each task takes a seasoned professional 3 to 8 hours
- ~70 yes/no rubric checks per task, weighted 75% factual accuracy and 25% visual design
- Every model runs in the same harness (Stirrup) with the same tools, sandbox and turn budget
- 200 tasks stay private with Artificial Analysis, so they can't leak into training data
- 10 public tasks on @huggingface 🤗

Gemini 4 Carbon is #2 on quality, 3 points behind Claude Fable 5.2, at $6.29 per task vs $31.97.

Blog: blog.google/innovation-and…
Results: artificialanalysis.ai/evaluations/mka

We wrote a practical Developer Guide for Gemini 4 Carbon covering API changes, long decode up to 1M tokens, and multi-agent patterns: aistudio.google.com/learn/gemini-4…

Upgrading from Argon means just changing the id to gemini-4-carbon. I use medium thinking_level for almost everything. For bigger multi-file tasks, the new /swarm preview in @Antigravity creates a multi-agent team that can communicate via a message board. You can put Carbon on architecture and code review while 3.8 Flash works on parallel edits.

Gemini 4 Carbon is #1 on CursorBench and available in Cursor. Give it a try!