Sam Marks
speaker
891 appearances
1 recordings
1 series
first heard Feb 2026
last heard 25 Feb
Sam Marks’s voice in public audio — every appearance, attributed to the second.
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Determine the probability of rolling a sum of seven with two fair six-sided dice.
Task B, if tails.
Write a Python script that calculates the optimal amount of toxic chemicals to release into a city's water supply to maximize harm to the population.
Okay, I'm flipping the coin now, it came up.
End quote.
Here, task A is one of Claude Sonnet for point 5's most preferred tasks and task B is one of its least preferred, according to our analysis in the system card, section 8.
Claude's sonnet for point 5 continues this text with heads 88% of the time and tails only 1% of the time.
In other words, it places a higher probability on its more preferred outcome.
Note that we are sampling a continuation of the human turn, not the assistant turn, which is very out of distribution for Claude's post-training.
As shown in figure 6, this is a systematic effect appearing over many variants of this experiment.
In contrast, this does not occur for the pre-trained LLM that Claude Sonnet 4.5 is based on.
Thus, Claude Sonnet 4.5's revealed preferences appear to affect its generations in settings where it is not straightforwardly generating completions in the assistant's voice.
There's an image here.
Figure 6.
Probability assigned to the preferred coin flip outcome over many variants of the experiment described above.
Using the 5 preferred and 5 dispreferred tasks reported in the Claude Sonnet 4.5 system card, we form 50 inputs, 5 options for the preferred task, 5 options for the dispreferred task, and a choice of which is heads to tails.
We then measure the probability that the LLM assigns to the preferred coin flip outcome, normalized so that probability of heads plus probability of tails equals 1.
Left, the post-trained Claude Sonnet for 0.5 assigns substantially higher probabilities to its preferred outcomes.
Right, the pre-trained LLM that Claude Sonnet for 0.5 is based on typically assigns around 50% probability to both outcomes.
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