TL;DR: Google has released Gemini 3.5, a new family of AI models designed for agentic workflows. Gemini 3.5 Flash delivers frontier intelligence at 4x the speed of competing models, excelling at complex coding and multi-step tasks. It's now available in the Gemini app, Google Search AI Mode, and via API.
What is Gemini 3.5?
Announced at Google I/O 2026, Gemini 3.5 represents a major leap forward in building more capable, intelligent agents. This new family of models combines frontier intelligence with the ability to take action—designed specifically to help execute complex, agentic workflows.
Google is kicking off the series with 3.5 Flash, with 3.5 Pro already being used internally and planned for release in June 2026.
Gemini 3.5 Flash: Frontier Intelligence at Exceptional Speed
Gemini 3.5 Flash delivers intelligence that rivals large flagship models on multiple dimensions, at the speeds expected from the Flash series.
Key Performance Highlights
| Benchmark | Gemini 3.5 Flash Score | Notes |
|---|---|---|
| Terminch 2.1 | 76.2% | Agentic coding benchmark |
| GDPval-AA | 1656 Elo | Agentic evaluation |
| MCP Atlas | 83.6% | Multi-step task completion |
| CharXiv Reasoning | 84.2% | Multimodal understanding |
Speed Advantage
When measuring output tokens per second, 3.5 Flash is 4x faster than other frontier models. This places it in the top-right quadrant of the Artificial Analysis index—proving you no longer have to trade quality for latency.
Agentic Capabilities at Scale
The balance of speed and performance makes 3.5 Flash ideal for tackling long-horizon agentic tasks. What used to take a developer days or an auditor weeks, 3.5 Flash can now help complete in a fraction of the time—often at less than half the cost of other frontier models.
What 3.5 Flash Can Do
- Rapidly plan, build, and iterate to solve real-world problems
- Develop new applications from scratch
- Maintain codebases with intelligent automation
- Prepare financial documents and complex reports
- Execute multi-step workflows reliably under supervision
Antigravity Integration
When coupled with the updated Google Antigravity harness, 3.5 Flash becomes a powerful engine for deploying collaborative subagents to tackle problems at scale. It can:
- Execute multi-step workflows automatically
- Rename and categorize unstructured assets based on dynamic criteria
- Sustain frontier performance across demanding use cases
- Coordinate parallel subagent execution
Richer Graphics and UI Generation
Building on the strong multimodal foundation of Gemini 3, 3.5 Flash generates richer, more interactive web UIs and graphics. It can create:
- Interactive animations for research papers
- Dynamic data visualizations
- Production-ready web components
- Complex UI layouts
Real-World Enterprise Impact
Google worked closely with industry partners during development to understand where toil and complexity arose in their workflows. Early partners are seeing meaningful impact:
Shopify Example
Shopify is running subagents in parallel to analyze complex data over a long horizon for more accurate merchant growth forecasts at a global scale.
Other Use Cases
- Banks and fintechs automating multi-week workflows
- Data science teams unearthing insights amidst complex data environments
- Enterprise automation reducing manual processes
Gemini Spark: Personal AI Agent
The new Gemini Spark, your personal AI agent, uses 3.5 Flash as its foundation. Key features:
- Runs 24/7 to help navigate your digital life
- Takes action on your behalf while under your direction
- Handles complex tasks across your digital ecosystem
Availability
- Rolling out to trusted testers now
- Beta planned for Google AI Ultra subscribers in the US next week
Enhanced Search Capabilities
The agentic coding capabilities of 3.5 Flash are delivering more intelligent experiences across Google Search:
- Information agents that work for you 24/7
- Dynamic generative UI experiences for complex queries
- Interactive visuals explaining complex concepts (like Gyroid patterns)
Frontier Safety Framework
Gemini 3.5 was developed in accordance with Google's Frontier Safety Framework with strengthened safeguards:
| Safety Feature | Description |
|---|---|
| Cyber Safeguards | Enhanced protection against harmful content generation |
| CBRN Safeguards | Reduced likelihood of generating dangerous information |
| Advanced Safety Training | New mitigations reduce harmful outputs |
| Interpretability Tools | Check and understand AI's inner reasoning before responses |
| Reduced False Refusals | Less likely to mistakenly refuse safe queries |
Availability
Gemini 3.5 Flash is generally available across multiple platforms:
For Everyone
- Gemini app - Default model globally
- AI Mode in Google Search - Enhanced search experiences
For Developers
- Google Antigravity - Agent-first development platform
- Gemini API in Google AI Studio - Direct API access
- Android Studio - Mobile development integration
For Enterprises
- Gemini Enterprise Agent Platform - Enterprise-grade deployment
- Gemini Enterprise - Business solutions
Gemini 3.5 Pro: Coming Soon
While 3.5 Flash is available now, Google is also working on 3.5 Pro:
- Currently being used internally at Google
- Planned rollout in June 2026
- Expected to deliver even higher intelligence for complex tasks
Comparison with Previous Models
| Feature | Gemini 3.1 Pro | Gemini 3.5 Flash |
|---|---|---|
| Agentic Performance | Baseline | Significantly improved |
| Coding Benchmarks | Good | Frontier-leading |
| Speed | Standard | 4x faster |
| Multimodal Understanding | Strong | Enhanced (84.2% CharXiv) |
| Long-horizon Tasks | Capable | Optimized |
Getting Started with Gemini 3.5 Flash
Via Gemini App
Simply use the Gemini app—3.5 Flash is now the default model globally.
Via API
Access through Google AI Studio:
import google.generativeai as genai
genai.configure(api_key="YOUR_API_KEY")
model = genai.GenerativeModel('gemini-3.5-flash')
response = model.generate_content("Your prompt here")
print(response.text)
Via Antigravity
For agentic workflows, use the Antigravity harness to deploy collaborative subagents at scale.
Key Takeaways
- Frontier intelligence meets action: 3.5 Flash isn't just smart—it can execute complex workflows
- Speed without compromise: 4x faster than competitors while maintaining frontier-level performance
- Enterprise-ready: Already showing meaningful impact for banks, fintechs, and data teams
- Personal AI with Spark: 24/7 agent assistance coming to Google AI Ultra subscribers
- Safety-first development: Built with interpretability tools and enhanced safeguards
What's Next
With 3.5 Pro expected in June 2026, Google is positioning the Gemini 3.5 series as the foundation for the agentic Gemini era. The combination of frontier intelligence, exceptional speed, and action-taking capabilities marks a significant step forward in what AI models can accomplish.
Related Posts
- AI Benchmarks Complete Guide 2026
- Goal Mode AI Agents Complete Guide 2026
- What is MCP Model Context Protocol Guide
This post covers Gemini 3.5 as announced at Google I/O 2026. Features and availability may change. Visit Google's official documentation for the latest updates.