Now (September 2026)
Available today. Every item was checked against official docs or first-hand reports.
Coding agentsAvailable now
One prompt in a folder builds the first version
Claude Code, Codex (inside the ChatGPT desktop app, default model GPT-6 Astra), Cursor Agent, GitHub Copilot, Google Antigravity, Devin, Kiro and OpenCode all take a folder, read a spec, plan, write code, run tests and iterate. Claude Code is the most-used agent among professional developers (39% worldwide in JetBrains' 2026 survey).
Tools: Claude Code (Fable 5.1), Codex (GPT-6 Astra), Cursor, Copilot, Antigravity, Devin, Kiro, OpenCode
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Desktop controlAvailable now
Agents can now use your computer, not just your code
The Codex app has a "Computer use" plugin that sees and operates macOS/Windows apps (ChatGPT Work or Codex plan; Windows is foreground-only). Claude Code's desktop Code tab offers Computer Use on Pro/Max (Mac/Windows) with view-only, click-only or full-control tiers per app. Google's Gemini Computer Use API (preview) drives browsers, Android and desktops with Gemini 3.8 Flash; Antigravity runs browser-in-the-loop agents for free.
Tools: Codex computer use, Claude Code Computer Use, Gemini Computer Use, Antigravity, Claude Cowork, Claude for Chrome
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StandardsAvailable now
AGENTS.md and MCP are the shared plumbing
AGENTS.md (Linux Foundation's Agentic AI Foundation) is read natively by Codex, Cursor, Copilot, Antigravity, Kiro, OpenCode, Devin, Zed, Warp and Junie; Claude Code reads CLAUDE.md, which can import it. The Model Context Protocol, now also under the AAIF, connects agents to 10,000+ production servers — including game engines and design tools. That is why our build kit ships as AGENTS.md and lists MCP servers.
Tools: agents.md, MCP
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Engines & 3DAvailable now
Agents work inside Unity, Blender and Godot
Unity ships an official AI Assistant and MCP Server (Unity 6, beta) that inspect GameObjects and drive editor actions; the community "MCP for Unity" adds 47 tools. blender-mcp (28k stars) lets Claude Code, Codex, Antigravity or Cursor build scenes, run Python, pull Poly Haven assets and generate meshes with Rodin or Hunyuan3D. godot-mcp creates scenes and nodes and runs projects. Unreal has community, experimental MCP servers only.
Tools: Unity AI Assistant + MCP Server, CoplayDev/unity-mcp, ahujasid/blender-mcp, @coding-solo/godot-mcp, chongdashu/unreal-mcp
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Design toolsAvailable now
Design apps are agent-addressable
Figma's MCP server reads design context and, in beta, writes to the canvas; Figma Make builds from prompts. Webflow and Canva expose MCP servers, Framer's agent builds pages and components, Rive Agent is free for all users, Adobe Firefly has an AI Assistant that picks tools across image, video and audio.
Tools: Figma MCP (mcp.figma.com/mcp), Webflow MCP, Canva MCP, Framer AI, Rive Agent, Adobe Firefly
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Generative mediaAvailable now
Images, video, 3D and music are cheap enough to prototype with
Nano Banana 2 images cost about $0.045 each, Veo 3.1 Lite video $0.05 per second, Meshy has a free 3D tier with an MCP server, Suno Pro is $8 a month, and Google's Genie 3 generates playable worlds at 720p for AI Ultra members. Prototype assets no longer need a budget line.
Tools: Nano Banana 2, Veo 3.1, Kling 3.0, Runway Gen-4.5, Meshy, Rodin, Hunyuan3D, Genie 3, Suno v6, ElevenLabs v3
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ModelsAvailable now
Frontier models with 1M-token context are the default
Claude Fable 5.1 (1 Sep), GPT-6 Astra (3 Sep) and Gemini 3.8 Flash (2 Sep) all shipped this month. Agents now read whole codebases and long specs at once — a single HTML prototype fits comfortably.
Tools: Claude Fable 5.1, GPT-6 Astra, Gemini 3.8 Flash
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Next 6 months (to March 2027)
Announced with dates, or the obvious next step of something already shipping.
PhonesAnnounced & dated
Siri acts inside apps on iOS 27 (14 Sep 2026)
iOS 27 ships Siri AI with on-screen awareness and in-app actions through App Intents, running on-device or in Private Cloud Compute. Expect "the assistant does it for you" to become a normal expectation of phone apps — worth designing for in prototypes.
Tools: Siri AI, App Intents
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VideoAnnounced & dated
Sora API shuts down 24 Sep 2026
OpenAI's Sora app closed in April and the API closes this month; Veo, Kling and Runway are the remaining mainstream video generators. If a prototype mentions video, plan around those.
Tools: Veo 3.1, Kling 3.0, Runway
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PricingAnnounced & dated
Gemini 3.x introductory prices end 31 Dec 2026
Flash-class output prices roughly double after the promo. Free tiers stay, but heavy users of this site should budget for it — or lean on Flash-Lite, which stays cheap.
Tools: Gemini 3.8 Flash, 3.5 Flash-Lite
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CursorAnnounced & dated
Multi-agent "Projects" coordinate cloud subagents
Cursor's Projects (10 Sep) put a coordinator over cloud subagents; Codex added worktrees and a Windows background daemon the same week. One brief, several agents, parallel milestones is becoming the default shape of a build.
Tools: Cursor Projects, Codex CLI 0.154
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DesignAnnounced & dated
Figma's write-to-canvas MCP leaves beta and becomes usage-billed
Agents drawing directly into Figma is free during beta; Figma has said it will be metered afterwards. Design handoff from a prototype to a real design file is about to be routine — and paid.
Tools: Figma MCP
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ModelsLikely
Gemini 3.5 Pro lands; Claude Haiku 4.5 retires
Gemini 3.5 Pro was announced at I/O 2026 and is "pending testing"; Anthropic retires Claude Haiku 4.5 on or after 15 Oct 2026. Expect OpenAI DevDay and Adobe MAX in October to push GPT-6 agent tooling and Firefly agents further.
Tools: Gemini 3.5 Pro, Claude Haiku 4.5
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Desktop controlLikely
Computer use reaches cheaper plans and Windows agents exit preview
Anthropic and OpenAI both have desktop control in production on Mac and Windows behind top-tier plans; Microsoft's on-device agent registry, File Explorer and Settings MCP connectors are in prerelease. The pattern usually broadens within two quarters.
Tools: Claude Code, Codex, Windows agent platform
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Within 12 months (to September 2027)
Our reading of public roadmaps and analyst reports — plausible, not promised.
EnginesLikely
Official engine MCP servers become the norm
Unity already ships one; the community versions for Blender, Godot and Unreal are the templates vendors are likely to adopt. A game prototype plus a brief will increasingly go straight into an engine scene built by an agent.
Tools: Unity, Godot, Blender, Unreal
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On-deviceLikely
Small local models handle UI actions
Apple's on-device foundation models (3B and 20B), Windows Foundry Local and Gemma 4 point to local sub-agents that tap, type and file things without the cloud — cheaper, private, always on.
Tools: Apple Foundation Models, Foundry Local, Gemma 4
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EconomicsLikely
Prices keep falling 25–45% per generation; 1M context is table stakes
Fable 5.1 arrived about 25% cheaper than its predecessor and GPT-5.6 Luna costs $0.20 per million input tokens. The cost of trying an idea keeps heading toward zero, which shifts the scarce thing to knowing what to ask for.
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Reality checkAvailable now
Most "agents" in production still aren't, and AI code needs review
Menlo Ventures counted only 16% of enterprise generative-AI deployments as true agents, and independent analyses of AI co-authored pull requests find markedly more major issues than human ones. Faster building raises the value of validating the idea first — which is what a prototype is for.
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WorldsSpeculative
Prompt-to-playable worlds that export to engines
Genie 3, Tencent's HY-World 2.0 and "WorldClaw" already generate explorable worlds from text; the open question is whether they export clean, editable scenes. If they do, a one-sentence game idea could become an engine project, not just a browser demo.
Tools: Genie 3, HY-World 2.0, Hunyuan3D-WorldClaw
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AgentsSpeculative
An agent builds a full Unity or Unreal scene from a spec, end to end
OpenAI's own GPT-6 Astra examples include building video-game scenes; combined with engine MCP servers and desktop control, a brief like the ones this site produces could drive an entire scene build. Plausible within a year; not a product today.
Tools: GPT-6 Astra, Unity MCP, Codex computer use
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