Best AI Agents for Full-Stack Apps — Google
The best Google model for building full-stack apps is Gemini 3.5 Flash, rated 1235 in Design Arena's full-stack agent arena — given a brief and a tool loop, and judged on what it actually shipped. Gemini 3.1 Pro Preview (1110) and Gemini 3 Flash Preview (1104) round out the top three.
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gemini-3.5-flashReasoningToolsJSON+250.2 intel · $1.50/M · 270 t/s1235Agent Elo - 2gemini-3.1-pro-previewReasoningToolsJSON+246.5 intel · $2.00/M · 136 t/s1110Agent Elo
- 3gemini-3-flash-previewReasoningToolsJSON+2$0.500/M · 1.0M ctx1104Agent Elo
How this is ranked
Models ranked by Design Arena Elo in the full-stack agent arena — each one is given a brief and a tool loop and has to build a working application, with humans judging the results head to head. This measures something a static coding benchmark cannot: whether a model can hold a multi-file project together, recover from its own mistakes, and finish.
Frequently asked
Which Google model builds the best full-stack app?
The best Google model for building full-stack apps is Gemini 3.5 Flash, rated 1235 in Design Arena's full-stack agent arena — given a brief and a tool loop, and judged on what it actually shipped. Gemini 3.1 Pro Preview (1110) and Gemini 3 Flash Preview (1104) round out the top three.
What's a good alternative to Gemini 3.5 Flash?
Gemini 3.1 Pro Preview (1110) is the closest alternative on this metric, followed by Gemini 3 Flash Preview (1104). See the full ranking above for the tradeoffs.
How many Google models are there?
modelgrep tracks 30 Google models with live benchmarks, speed, latency and per-provider pricing, led on intelligence by Gemini 3.5 Flash. 3 of them qualify for this ranking.