Deepseek-harness is a free and open source framework for building code agents with models
Interchangeable tools, sandboxes, interfaces and agent loops. Works with deepseek, claude, GPT, gemini and more.
Lighthouse on a rocky island made by Deepseek-v4.1 Flash
Andrej karpathy could have charged $2,000 for this course.
He put it on YouTube. The full training stack. Tokenization. Neural network internals. Hallucinations. Tool use. Reinforcement learning. RLHF. DeepSeek. AlphaGo. 3 hours of the most comprehensive LLM education that
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