A2UI Roadmap 2026: When Will the React Renderer Arrive?
A deep analysis of Google's A2UI official roadmap. Learn when React support, v1.0, and native mobile renderers will be released.
[!IMPORTANT] January 26, 2026 Update: Major Strategy Shift In a massive update this week, Google has officially released the open-source A2UI SDK and announced a full partnership with CopilotKit. This moves the timeline forward significantly.
One of the most frequently asked questions since Google’s A2UI announcement has been: “When will React be supported?”
Today, we break down the official roadmap to give you a clear picture of what’s coming and when.
Current State: SDK Launched & CopilotKit Integration
As of January 26, 2026, A2UI has moved fast. The “Public Preview” label is shifting towards “Ecosystem Adoption.”
- Official SDK Released: Google dropped the open-source A2UI SDK this week (Jan 20-26), signal-boosting the move to a standard.
- CopilotKit Partnership: CopilotKit announced full support for A2UI, providing a production-ready orchestration layer immediately.
Currently Supported Renderers
| Renderer | Status | Notes |
|---|---|---|
| Flutter | ✅ Stable | First-class support via Flutter GenUI SDK |
| Angular | ✅ Stable | Official renderer available |
| Web Components (Lit) | ✅ Stable | Framework-agnostic web solution |
| React | 🚀 In Progress | CopilotKit now offers a bridge; Official Google Renderer coming Q1 |
The Official Roadmap
Based on information from a2ui.org and Google’s developer communications, here is the projected timeline:
Q1 2026: A2UI v0.9 + React Renderer
- React Renderer: This is the most anticipated feature. React dominates web development, and its absence has been a barrier to adoption.
- Protocol Refinements: Expect minor breaking changes as the community provides feedback on edge cases.
Q2 2026: Native Mobile Renderers
- Native Mobile Renderers: Beyond Flutter, expect dedicated renderers for SwiftUI (iOS) and Jetpack Compose (Android).
Q4 2026: Protocol v1.0
- Protocol v1.0: The “stable” release. After this, the core JSON schema and component catalog will be frozen for long-term support.
What Does This Mean for Developers?
If You’re a React Developer
- Wait or Contribute? You can wait for Q1 2026, or you can contribute to the project to accelerate development.
- Use the Protocol Today: If you are using Next.js/React, you can actually use the Vercel AI SDK to transport A2UI payloads right now. See our A2UI vs Vercel AI SDK Guide for details.
- Prepare Now: Start learning the A2UI JSON schema. The concepts are framework-agnostic, so your knowledge will transfer directly when React is supported.
If You’re a Flutter Developer
- Start Today: Flutter is a first-class citizen. The Flutter GenUI SDK is production-ready.
If You’re Building Enterprise Tools
- Vertex AI Integration: A2UI is already integrated into Vertex AI Agent Builder. Consider it for your next agent project.
Why Is React Coming Later?
A key question is: Why wasn’t React included in the initial launch?
Based on our analysis, there are two likely reasons:
- Google’s Internal Priorities: Google’s internal tools (Opal, Gemini) use Angular and Flutter. React wasn’t a priority for their use cases.
- Community-Driven Development: By releasing as open-source first, Google can let the React community drive its own renderer development, ensuring it meets real-world needs.
Key Takeaways
- A2UI v0.8.0 is available now for Flutter, Angular, and Lit.
- React support is targeted for Q1 2026.
- Protocol v1.0 for long-term stability is expected Q4 2026.
- Start learning the A2UI JSON schema today—it’s framework-agnostic.