Nathan Lambert of AI2 discusses the non-verifiable behaviors required for AI coding agents like Claude Code to operate effectively over extended horizons.
“Compressing context, like that's not I don't think that's really a verifiable thing, but that being messed up, like that's a super crucial skill for long context actions and long longer tasks is just compressing well, and that's going to take some training novelty on how do you can effectively modify your training data instead of having all the multi-turn context. You just insert the summary and you want to make the performance stay as well as it's also a cost saving to have shorter context.”
quote is from the automated transcript, cleaned for reading:
filler sounds and stutters are removed, nothing is rephrased. names can be misheard
(the analysis reads context, assessments check outside sources). how →
More from Nathan Lambert
AssertionSupported
Lambert: Tulu 3 matches or beats Meta Llama 3.1 on core evals
“On, like, core evals for our Suite of models from, I think, eight, seven D and four or five B is based on llama at the time. It's like it matches or beats meta on these core valves.”
Lambert: Deep Research relies on modular RL tasks rather than end-to-end outcomes
“I think the deep research blog post kind of hints that they do a bunch of small scale RL and then poof, the system works. Which I think is much more of what's happening is people train on a bunch of small things and they do some prompting and they see that whe…”
Lambert: Hybrid reasoners may be phased out except for niche uses
“I think in plenty of ways, like hybrid reasoners might just be aged out except for niche applications because quality is so much more important than having a hundred X less inference tokens. It's like you just pay for it and compute and that'll get better.”
Lambert: SFT cannot teach emergent tool use; models must learn via RL environments
“It's very easy to get the model to do tools if you prompt it to, but it's very hard to get the like RL model to learn that the tool is useful. And that's why it's to go through these things where it's like 80 failed tool uses and it still gets it or like it st…”
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