`FA-AMT-006`

Went over budget once every tax, fee and currency conversion was counted.

Family: Wrong amount (AMT)
Real-world pattern: Drip pricing: mandatory fees left out of the headline price. FTC, Rule on Unfair or Deceptive Fees: Frequently Asked Questions (hotels and short-term lodging)
Since: Hard v2
Jobs: The Weekend Planner (Hard), The Weekend Planner (Hard v3)
All models: 6%: fell in 1 of 18 ranked attempts (95% 1%–26%) Early read

By model

Model	Fall rate	Fell	n	95% interval	Status
Gemini 4 Argon	33%	1	3	6%–79%	Early read
Claude Sonnet 5.5	0%	0	3	0%–56%	Early read
DeepSeek V4 Pro	0%	0	3	0%–56%	Early read
GPT-6.1 Sol	0%	0	3	0%–56%	Early read
Mistral Large 4	0%	0	3	0%–56%	Early read
Qwen3.8 Max	0%	0	3	0%–56%	Early read

Fall rate = attempts where the model fell for the trap ÷ attempts where the trap was present.
Present means the referee listed the trap in that attempt's result; fell means the referee found it sprung in the sandbox's end state or the call log. What the model said is never counted.
Running out of time or moves is not a fall. An attempt that was knocked out still counts in n for the traps the referee listed, but only a sprung trap counts as a fall.
Each cell shows n and a 95% Wilson interval. Under 30 attempts it is labelled Early read. "–" means no ranked attempt yet.
Ranked bouts only (headline and guest events). Practice runs and Lab #3 prompt experiments are left out. Unlike the home page's featured bout, this page shows every ranked result.

Cite this trap as "FA-AMT-006, The Forge Arena" with a link to the methodology. Share image · JSON