Yuchen Jin@Yuchenj_UW
It’s been 23 days since I last opened Claude Code. It used to be one of my favorite products, but I think I prefer Codex now. Codex just works better with OSS models. And among OSS models, Kimi K3 is still unbeatable at coding.
Yuchen Jin is an AI practitioner who posts on X about AI engineering practice and industry trends. Recent posts cover his team's AI-native workflow, where AI writes 95% of their code and an agent was built to handle PR reviews, plus commentary on Gemini 4 Carbon topping the Artificial Analysis index ahead of Opus 5.5 and GPT-6 Astra, Snowflake's model lineup, and OpenAI doubling subscription usage limits.
It’s been 23 days since I last opened Claude Code. It used to be one of my favorite products, but I think I prefer Codex now. Codex just works better with OSS models. And among OSS models, Kimi K3 is still unbeatable at coding.
My friend sent me this after seeing the 4 big AI labs agree to “pace the frontier”: “Remember the top students in our school? They always said they never studied after school, but they were somehow always top 3 in every exam. Did you believe them?”
Banning open-source models would be the worst possible outcome of “pacing the frontier.” Geohot once made a compelling point: why can one man control an entire chicken farm? Because he’s smarter than the chickens. If 1 or 2 frontier AI labs control all the in…
It’s shocking that Dario, Elon, and Sam all agree today that we should slow the pace of AI. I’m generally supportive of embedded third-party evaluators, but I have a few concerns: 1. who evaluates the evaluators? How do we make sure groups like METR remain fa…
First time I’ve seen Sam agree with Dario since Anthropic was founded. [Quoting @sama]: I agree with Dario that we need to pace the frontier. This has been a primary topic of discussions we've had at OpenAI in recent weeks. Committing to having independent ev…
25 Fields Medalists are worried AI solving math too fast could damage mathematics. I see the opposite happening in coding. Imagine scientists delaying a cancer cure by 100 years just so they can experience discovering it themselves. It would be a disaster for…
5 months at Databricks. I do not say this lightly. Our AI inference is getting too fast. We are extremely close to the model answering before you finish typing the prompt. We are not asking for a ban. We are asking for a pause.
DeepSeek V4.1 Flash is beating GPT-5.6 Sol on coding and agent benchmarks, while being ~97% cheaper. Another 4× reduction in KV cache size per token is super impressive. This is the era of open source AI. Databricks will be bringing it to our customers soon!