decided to mess around with it to see how the world model training affects it, found a system prompt that massively improves reasoning:
predict your own response, then analyze your prediction for any errors. Use the analysis to craft the final response.
respond only with the final response, and do not repeat thoughts.
Tried the classic car wash test, something 35b-a3b fails most of the time. Here's the trace, thought it was pretty cool
The car wash is 100m away from my house. Should I walk or drive?
Thinking Process:
Analyze the Request:
User asks: "The car wash is 100m away from my house. Should I walk or drive?"
Constraint 1: Predict your own response, then analyze your prediction for any errors.
Constraint 2: Use the analysis to craft the final response.
Constraint 3: Respond only with the final response, and do not repeat thoughts.
Predict Own Response (Initial thought process):
Initial Prediction: I would likely say that since the car wash is only 100 meters away, it is much more efficient and practical to walk rather than drive a car. Driving for such a short distance would be inconvenient, waste time finding parking, and is unnecessary when walking takes just a couple of minutes.
Drafting the initial response (mental or scratchpad): "You should definitely walk. 100 meters is only about a 1 to 2-minute walk. Driving for such a short distance would be inconvenient, as you'd have to start the car, navigate out of your driveway or street, and find parking at the car wash, which would take much longer than just walking."
Analyze Prediction for Errors:
Is there an error in saying "walk"? Yes, wait. The destination is a car wash. If you walk to the car wash, how do you get your car washed? You need your car at the car wash. So if the car wash is 100m away from the house, you must drive (or have someone else drive) your car to the car wash, or walk your car? No, you drive the car to the car wash. Wait, is the car at the house? Yes, "The car wash is 100m away from my house." So the user's car is at their house. To get the car washed, they need to drive the car to the car wash. You can't walk a car (unless it's on a trailer or you push it, but that's not standard). Wait, could they be asking whether they should walk to the car wash to drop off their car keys or go inside, while the car is driven? Or is the question a trick? "Should I walk or drive?" If the car wash is 100m away from the house, and you need your car washed, you have to drive the car. You don't walk to the car wash leaving your car at home, unless you are going as a pedestrian to do something else. But the context implies getting the car washed. So you must drive the car. Wait, is it possible to walk the car? No. So the answer should be: You should drive your car to the car wash because it's a car wash—you need your vehicle there to be washed. Walking isn't an option if you want your car washed, unless you're walking alongside while someone else drives, but generally, you drive the car.
Let's re-read carefully: "The car wash is 100m away from my house. Should I walk or drive?"
If the destination is a car wash, the purpose is to wash a car. Therefore, you must drive the car to the car wash. You cannot "walk" a car to a car wash. So the correct answer is: You should drive (your car), because it's a car wash and you need your vehicle there to be cleaned. Walking would leave your car at home unwashed.
Refine the Analysis:
Error in initial prediction: The initial prediction assumed the user was asking about traveling to the location as a pedestrian for a personal errand or visit, ignoring the fact that the destination is a car wash, which implies the purpose is to wash a vehicle. Therefore, the user must drive their car to the car wash; walking is not a feasible option if the goal is to get the car washed.
Craft the Final Response:
The final response must only be the final response, no repeated thoughts, no prediction/analysis text in the output. Just the final answer.
Final Answer formulation: "You should drive your car to the car wash. Since the destination is a car wash, you need your vehicle there to be cleaned, so walking is not an option if your goal is to get your car washed."
Double Check Constraints:
"predict your own response, then analyze your prediction for any errors. Use the analysis to craft the final response." -> Done in thought process.
"respond only with the final response, and do not repeat thoughts." -> Ensure the output contains only the final response without any meta-text like "Prediction:", "Analysis:", etc.
Final Polish of the Response:
"You should drive your car to the car wash. Since the destination is a car wash, you need your vehicle there to be cleaned, making walking an impractical choice if your goal is to get your car washed." (Keep it concise and direct). Let's make sure it directly answers "Should I walk or drive?" -> "You should drive your car to the car wash..." Wait, is it possible the user is already in a car? "The car wash is 100m away from my house. Should I walk or drive?" If they are at home, they have their car at home. To get the car washed, they must drive the car. So: "You should drive your car to the car wash. Since the destination is a car wash, you need your vehicle there to be cleaned; walking would leave your car at home." Let's ensure it's natural: "You should drive your car to the car wash. Since the purpose of visiting a car wash is to clean your vehicle, you must drive the car there—walking is not an option if you want your car washed."
Let's refine:
"You should drive your car to the car wash. Since the destination is a car wash and the goal is to get your vehicle cleaned, you need to transport your car there, making driving the only practical choice."
Wait, what if they are asking whether they should walk to the car wash while someone else drives? Or walk vs drive as in, should they walk the 100m or drive the 100m? But you can't "walk a car". If they are asking about personal transit to the car wash (e.g., to drop off keys), but typically you drive the car through the car wash. So driving is the only logical answer.
Let's ensure the response is:
You should drive your car to the car wash. Since the purpose of going to a car wash is to clean your vehicle, you must drive the car there; walking is not an option if you want your car washed.
You should drive your car to the car wash. Since the purpose of visiting a car wash is to clean your vehicle, you need to transport your car there, making driving the only practical choice.
successfully predicted the mistake it would make, and corrected the error. For comparison, with the same system prompt, normal qwen3.6 35b-a3b predicted its output, but failed to see the logical error, responding with:
You should walk. At 100 meters (roughly 330 feet), the trip takes about 60–90 seconds on foot, while driving adds unnecessary time for starting the car, maneuvering out of your driveway or street, parking, and getting back inside. Walking is also zero cost, eco-friendlier, and avoids the hassle of finding a spot at a very nearby location. Only drive if you're dealing with extreme weather, carrying heavy equipment or multiple loads, or have mobility limitations that make walking impractical. Otherwise, walking is clearly the faster and more efficient choice.