Reasoning · 1 checks · max 800 tokens · benched 2026-09-16
Alibaba models side by side on "Stacked discounts and tax": Qwen3.8 Flash scores 10/10; Qwen3.8 Flash is the cheapest answer scoring 8+ at $0.07 per 1,000 runs. Outputs, checks, judge reasons, latency and cost.
System
Think carefully, then give only the final answer in the requested format.
User
An item costs $250.00. A 20% discount is applied, then a $15.00 coupon is subtracted, and finally 8% sales tax is added to the resulting amount. What is the final price? Reply with only the amount in dollars to two decimal places, for example 12.34, with no currency symbol.
Rubric for the judge: The single correct answer 199.80 (250 x 0.8 = 200; 200 - 15 = 185; 185 x 1.08).
Every cell is one OpenRouter call at temperature 0 with the prompt's token cap and reasoning effort "low" where the model supports it. Cost is usage × the catalogue rate in models.json. Quality is one judge call to anthropic/claude-haiku-4.5 against the prompt's rubric, cached per prompt version.
qwen/qwen3.8-max-0902
134 in · 164 out (155 reasoning) · 1 words · checks 1/1
199.80
Judge: The output matches the correct answer of 199.80 in the exact format requested (two decimal places, no currency symbol).
qwen/qwen3.8-27b
134 in · 141 out (64 reasoning) · 1 words · checks 1/1
199.80
Judge: The output correctly calculates the final price as 199.80 in the exact format requested (two decimal places, no currency symbol).
qwen/qwen3.8-flash
146 in · 100 out (91 reasoning) · 1 words · checks 1/1
199.80
Judge: The output matches the correct answer of 199.80 in the exact format requested (two decimal places, no currency symbol).
qwen/qwen3.7-plus
108 in · 280 out (271 reasoning) · 1 words · checks 1/1
199.80
Judge: The output matches the correct answer of 199.80 in the exact format requested (two decimal places, no currency symbol).
Reasoning: The single correct answer 199.80 (250 x 0.8 = 200; 200 - 15 = 185; 185 x 1.08). The deterministic checks are exact.
If the judge's bar of 8/10 is good enough for you, Qwen3.8 Flash at $0.07 per 1,000 runs. If you need the top score, Qwen3.8 Flash at $0.07 per 1,000 runs.
Run it yourself
Re-run this prompt on Alibaba with your own OpenRouter key, or tweak the wording and see what changes.
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