01What Is DeepSeek V4 Flash 0731?

DeepSeek V4 Flash 0731 is a new version of DeepSeek's AI model that just came out of preview. It's designed to be super fast, lightweight, and small, making it perfect for AI agents. This model can code, build games, and handle complex tasks without needing a huge setup.

In this episode, Julian Goldie tested over 50 builds with DeepSeek V4 Flash 0731 and compared them side by side with V4 Pro. He found that it is way better than the original preview and even better than V4 Pro in many cases. The model creates smoother, more polished results, especially for 3D games and interactive projects.

02Key Features of DeepSeek V4 Flash 0731

DeepSeek V4 Flash 0731 has several standout features that make it useful:

  • Speed and efficiency: It's built to be fast and lightweight, so it works well with AI agents that need quick responses.
  • Free access: You can use it for free through OpenCode, integrated into their agentic operating system.
  • Agent-focused design: Optimized for AI agents like Hermes, OpenClaw, and Pi, making it easy to delegate coding tasks.
  • Improved coding ability: Despite claims that it can't code, it handles complex 3D games and smooth controls effectively.

The model also supports a skill for Hermes agent from Noose Research, which automatically delegates coding tasks to OpenCode. This allows you to use DeepSeek V4 Flash 0731 as the brain while coding for free.

03How to Get Started with DeepSeek V4 Flash 0731

Getting started with DeepSeek V4 Flash 0731 is straightforward. Here are the steps Julian mentioned:

  1. Go to OpenCode and access the agentic operating system where DeepSeek V4 Flash 0731 is set up.
  2. Ensure you have the latest version of DeepSeek V4 Flash, as OpenCode has updated it.
  3. If using Hermes, install the OpenCode skill from Noose Research to delegate coding tasks automatically.
  4. Start building by typing prompts for games, websites, or other projects.

Julian also noted that you can find all his test builds on GoldieBench, where he showcases results from various models. For a full agentic setup, he recommends the AI Profit Boardroom, which includes Hermes Agent and the operating system.

04How to Use It: Examples from the Episode

Julian demonstrated several builds to show how DeepSeek V4 Flash 0731 performs. He created games like a flight simulator, a parachute game, and 3D games, all of which worked smoothly. In contrast, V4 Pro failed on the flight simulator, producing unusable results.

He explained that building games is a better test than websites because it checks reasoning, logic, physics, and UI creation. DeepSeek V4 Flash 0731 handled these tasks well, producing better graphics and controls than V4 Pro. For example, the 3D effects were much more polished, and the games were easier to control.

However, not everything worked perfectly. Some builds, like the pool game, were terrible. Julian emphasized that the model doesn't get everything perfect, but it creates many cool things overall.

He also showed a buggy build where you could see through the floor, highlighting occasional issues.

05Results and Comparisons from Testing

Julian tested DeepSeek V4 Flash 0731 against V4 Pro and found significant differences. In most builds, V4 Flash produced nicer UI, style, graphics, and overall feel. For instance, the parachute game was super buggy with V4 Pro, but much smoother with V4 Flash.

The flight simulator totally failed with V4 Pro but worked with V4 Flash.

He also mentioned that DeepSeek V4 Flash 0731 performed better than some frontier models in certain tasks, though it's not better than models like Fable 5 or GPT-516 Sol. On GoldieBench, Fusion by OpenRooter ranks top, but that uses a council of models. As a standalone, Opus 5 is good but slower and distractible compared to Fable 5.

06Tips, Limits, and Mistakes to Avoid

When using DeepSeek V4 Flash 0731, keep these tips in mind:

  • Expect failures: Like the pool game, some builds will be terrible. Don't rely on it for everything.
  • Use for agents: It's designed for AI agents, so use it with tools like Hermes or OpenCode for best results.
  • Prioritize speed: Speed matters more than absolute quality for day-to-day coding, so this model's speed is a big plus.
  • Test with games: Games are a great way to evaluate the model's reasoning and logic.

Avoid expecting frontier-model performance. It holds its own but isn't the best. Also, some builds may have graphical glitches, like seeing through floors, so always test outputs.

07Who Should Use DeepSeek V4 Flash 0731?

DeepSeek V4 Flash 0731 is ideal for developers and AI enthusiasts who want a fast, free coding model. It's perfect for those building with AI agents, as it's optimized for that purpose. If you're testing models for coding or game creation, this is a great option.

It matters because it makes advanced AI accessible for free, allowing you to build cool stuff without a big budget. Julian set up GoldieBench to showcase builds from every model he tests, and DeepSeek V4 Flash 0731 has become a top performer in his tests. Whether you're a hobbyist or professional, this model can help you create useful and interesting projects.