https://xitter.cf/t.co/IR1SKOTVBW Startups: https://xitter.cf/t.co/nuG9RProQy RL & data: https://xitter.cf/t.co/hceNvJcLge I read DMs. DM to suggest a topic for future surveys.

SF
Joined June 2013
I co-wrote this RL environment FAQ with @datagenproc from @EpochAIResearch:
Frontier labs are investing massively in RL environments, yet most of what happens in this space stays behind closed doors. @chrisbarber and @js_denain interviewed 18 people from RL environment startups, neolabs, and frontier labs. Here's what they found:
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Chris Barber retweeted
I'm excited to launch Relational Capital, a $50m solo GP fund. I spent the last 8 years as a founder, building @usekojo into the largest US construction procurement platform. Now I'm backing founders at the earliest stages with $1m-$5m checks. An abundant future lies ahead 🇺🇸
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Chris Barber retweeted
We are releasing Ultramarine 1 Flash, a frontier-class model built for knowledge work. It is open-source and achieves similar performance to Fable 5, while being 60x cheaper. It was post-trained by a team of 5 for ~$300k all-in. Available on API now, with weights releasing in 2 weeks.
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I asked people which tier they'd put each lab in: Frontier: - Anthropic: consensus - OpenAI: consensus n-1 (1 generation behind): - Google DeepMind: consensus - xAI: consensus - Meta (Muse Spark): over half say n-1 - Moonshot (Kimi): over half say n-1, some n-2 - Zhipu (GLM): over half say n-1, some n-2 - DeepSeek: over half say n-1, some n-2 - Thinking Machines (Inkling): leans n-1, some put n-2 n-2 (2 generations behind): - Alibaba (Qwen): leans n-2, some put n-1 - ByteDance (Seed): over half say n-2 - Xiaomi (MiMo): leans n-2, some put n-1 - MiniMax: over half say n-2, some n-1 - Tencent (Hy): over half say n-2 - NVIDIA (Nemotron): leans n-2, some put n-3+ n-3+ (3+ generations behind): - Microsoft (MAI): over half say n-3+, some n-2 - Cohere: over half say n-3+, some n-2 - Mistral: over half say n-3+ - Amazon (Nova): consensus - Apple: consensus Consensus = 75%+, over half = 51%-74%, leans = the most common pick but under half, some = 20%+. I asked 70 people. Engineers/researchers/founders at AI data cos, people at labs (I didn't count votes for their own lab), and founders/engineers at other startups. I didn't vote.
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I asked people: "who have you met in the AI data and post-training space that you find most insightful?" 5 votes: Daniel Chang (@dnnssl2) 3 votes each: - Abhijay Rana (@abhijaymrana) - Ryan Wexler (@RyanMWexler) - Sean Cai (@SeanZCai) - Will Brown (@willcb) 2 votes each: - Amy Tam (@amytam01) - Jesse Hu (@huyouare) - Nikhil Namburi (@nikhilvnamburi) - Thomas Liao (@distributionat) 91 people were picked. The other 82 got 1 vote each and are in the next two posts. People couldn't pick themselves. I didn't vote.
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