Grok 4.5, GPT-5.5, Claude Opus 4.8, and Claude Fable 5 were tested this week by TryAI to build identical interactive apps from a single prompt. The models were tasked with creating self-contained HTML files for interactive applications without external libraries or network calls. This test was conducted to compare their coding capabilities, latency, and cost, with Grok 4.5 recently launched and described by xAI as their smartest model yet.
TryAI gave each model the same three prompts, including building a 3D Rubik's Cube with scramble and solve buttons, and recorded the raw outputs. Each model had one chance to generate the app, with a single retry allowed if the app failed to render initially. The generated apps were then loaded in real browsers and tested for functionality. The results and video clips of each model’s output were shared on TryAI’s blog, allowing users to interact with the generated apps live.
This comparison highlights the evolving capabilities of AI coding models in generating complex interactive applications from minimal instructions. Grok 4.5’s training alongside Cursor emphasizes its focus on coding and agentic tasks, positioning it alongside OpenAI’s GPT-5.5 and Anthropic’s Claude models. Such direct model comparisons provide insights into performance differences, cost efficiency, and practical usability in real-world coding scenarios.
TryAI’s detailed build-off results were published on July 8, 2026, showcasing each model’s strengths and weaknesses in app generation. The test sets a benchmark for evaluating AI coding assistants, with Grok 4.5’s launch marking a notable development in AI-driven software creation according to tryai.dev.