Alibaba is coming for Claude...

FireshipAbout 5 min readJul 24, 2025Watch original
THE SUMMARYAI-generated

Key Concepts:

  • Quen 3 coder: Alibaba's openweight long horizon mixture of experts agent coding model.
  • Claude 4: The current leading AI coding tool.
  • Openweight model: An AI model whose weights are publicly available.
  • CLI tool: Command Line Interface tool, forked from Gemini CLI, allowing agentic properties like code execution and testing.
  • Long horizon reinforcement learning: A training process where the model learns over extended periods through trial and error in real-world environments.
  • Token context window: The amount of text or code the model can consider at once.
  • International Mathematical Olympiad (IMO): A prestigious mathematics competition.
  • Code Rabbit: A VS Code extension for advanced code reviews.

1. Introduction and Quen 3 Coder's Capabilities

  • Alibaba released Quen 3 coder, an openweight AI coding model.
  • Quen 3 coder is the first openweight model to match the programming performance of Claude 4.
  • A new CLI tool, forked from Gemini CLI, was released to leverage the model's agentic properties.

2. Training Data and Process

  • The model was trained on 7.5 trillion tokens with a 70% code ratio.
  • The model has seen a billion times more code than the average developer with 50 years of experience.
  • A meta process was used where AI determined which data to use for training.
  • Long horizon reinforcement learning was used across 20,000 parallel environments.
  • The model solves real-world problems in real environments, executing and testing code.

3. Performance Benchmarks and Model Size

  • Quen 3 coder outperforms Kimmy and GPT4.1 in benchmarks.
  • It performs almost on par with Claude 4.
  • It achieves this with a smaller model size, which is more efficient in terms of electricity and GPU usage.

4. Context Window and Practical Considerations

  • Quen 3 coder has a 256,000 token context window, which can stretch up to 1 million tokens.
  • This is enough to hold the entire codebase of most startups.
  • Running the full 480 billion parameter version requires significant GPU resources.
  • Using an API key from a cloud provider and the Quen CLI tool is a more realistic approach.

5. Claude 4's Dominance and OpenAI's Challenges

  • The model is unlikely to significantly impact Claude's dominance in the coding world.
  • To surpass Claude, a model needs to be open, inexpensive, and significantly more capable.
  • OpenAI's planned open model release has been delayed due to competition from Chinese models.
  • OpenAI has faced challenges, including talent loss.

6. International Mathematical Olympiad (IMO) Performance

  • Both Google and OpenAI achieved gold medal-level performance in the IMO.
  • OpenAI announced their achievement before the closing ceremonies, which was perceived as a "dick move" and backfired.

7. Code Rabbit Sponsorship

  • Code Rabbit, a VS Code extension for advanced code reviews, is the video's sponsor.
  • It offers a free extension with advanced code reviews in the editor.
  • The "fix all with AI" feature passes review context to AI code agents for automated changes.
  • Code Rabbit works with VS Code and forks like Cursor and Windsurf.

8. Conclusion

  • Quen 3 coder represents a significant advancement in open coding models.
  • The video concludes with a thank you to the viewers and a promise of future content.

Notable Quotes:

  • "Is this a breaking change?" - A humorous reference to a common question in software development.

Technical Terms and Concepts:

  • Openweight model: An AI model where the trained parameters (weights) are publicly available, allowing for inspection, modification, and reuse.
  • Long horizon reinforcement learning: A type of reinforcement learning where the agent learns to make decisions over extended periods, considering the long-term consequences of its actions.
  • Token context window: The maximum number of tokens (words, sub-words, or characters) that a language model can process at once. A larger context window allows the model to understand and generate longer and more coherent text.
  • Mixture of Experts (MoE): An architecture where multiple sub-models (experts) are trained to handle different parts of the input space. A gating network then decides which expert(s) to use for a given input.
  • Agentic properties: The ability of an AI model to act autonomously and proactively to achieve a goal, including planning, executing, and adapting to changing circumstances.

Logical Connections:

  • The video starts by introducing Quen 3 coder and its capabilities, then delves into the training process and benchmarks.
  • It then discusses the practical considerations of using the model, such as the need for significant GPU resources.
  • The video transitions to a discussion of the competitive landscape, including Claude 4's dominance and OpenAI's challenges.
  • Finally, it promotes Code Rabbit as a tool to improve code quality and efficiency.

Data and Statistics:

  • Quen 3 coder was trained on 7.5 trillion tokens with a 70% code ratio.
  • The model has a 256,000 token context window, which can stretch up to 1 million tokens.
  • The full version of Quen 3 coder has 480 billion parameters.

Synthesis/Conclusion:

Quen 3 coder is a significant advancement in open-source AI coding models, rivaling the performance of Claude 4 while being more accessible in terms of model size. Its extensive training data, long context window, and agentic capabilities make it a powerful tool for software development. However, the computational resources required to run the full model remain a barrier for many users. The video also highlights the ongoing competition in the AI field, with both Google and OpenAI achieving success in mathematical problem-solving. Finally, it promotes Code Rabbit as a valuable tool for improving code quality and efficiency.

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