Qwen3.8 Max (0902) vs Qwen3.8 27B vs Qwen3.8 Flash vs Qwen3.7 Plus on rewrite a stiff notice in a friendly tone
Alibaba models side by side on "Rewrite a stiff notice in a friendly tone": Qwen3.8 Flash scores 10/10; Qwen3.8 Flash is the cheapest answer scoring 8+ at $0.31 per 1,000 runs. Outputs, checks, judge reasons, latency and cost.
The prompt every model received
User
Rewrite the notice below in a warm, friendly, plain-English tone for a company-wide chat message. Keep every fact, including the date and time, in at most 80 words. Do not use the words "hereby" or "pursuant". Output only the rewritten message.
Notice: Staff are hereby informed that, pursuant to the scheduled electrical maintenance, the third-floor kitchen will be unavailable on Friday 3 October between 08:00 and 11:00. Alternative facilities are available on the second floor. Your cooperation is appreciated.
Rubric for the judge: Genuinely friendly tone, all facts kept (date, times, floor, alternative kitchen), under 80 words, no banned words.
Side by side
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.
Qwen3.8 Max (0902)
qwen/qwen3.8-max-0902
3/10
Latency
1.4s
Cost
$0.00273
Per 1,000
$2.73
167 in · 400 out (350 reasoning) · 29 words · checks 4/5
✓max_words
✓contains
✕contains
✓not_contains
✓not_contains
Hi everyone! Just a heads-up: the third-floor kitchen will be closed on Friday 3 October from 08:00 to 11:00 due to electrical maintenance. You're welcome to use the second-floor
Judge: Output is incomplete (cuts off mid-sentence), fails to mention alternative facilities are 'available', and doesn't reach a proper conclusion despite being under 80 words.
Qwen3.8 27B
qwen/qwen3.8-27b
10/10
Latency
864ms
Cost
$0.00132
Per 1,000
$1.32
158 in · 506 out (321 reasoning) · 43 words · checks 5/5
✓max_words
✓contains
✓contains
✓not_contains
✓not_contains
Hi team! Just a heads-up: the third-floor kitchen will be closed on Friday 3 October from 08:00 to 11:00 for scheduled electrical maintenance. No worries though — you can use the kitchen on the second floor during that time. Thanks for your understanding!
Judge: Rewrites notice in warm, friendly plain English; includes all facts (date, time, floors, reason); 48 words (well under 80); avoids banned words; perfectly formatted as requested.
Qwen3.8 Flash
qwen/qwen3.8-flash
10/10
top judge scorecheapest scoring 8+
Latency
2.7s
Cost
$0.00031
Per 1,000
$0.31
128 in · 616 out (405 reasoning) · 48 words · checks 4/5
✓max_words
✓contains
✕contains
✓not_contains
✓not_contains
Hi everyone! Just a heads-up: the third-floor kitchen will be closed on Friday 3 October from 08:00 to 11:00 for scheduled electrical maintenance. No worries, though — the second-floor kitchen is open and ready for you. Thanks so much for your patience, and sorry for the inconvenience! ☕
Judge: Warm and friendly tone, all facts preserved (date, time, floors, reason), 59 words, no banned words, perfectly formatted as requested.
Qwen3.7 Plus
qwen/qwen3.7-plus
1/10
failed: empty output (finish_reason length)
Latency
2.5s
Cost
$0.00209
Per 1,000
$2.09
128 in · 1600 out (1600 reasoning) · 0 words · checks 3/5
✓max_words
✕contains
✕contains
✓not_contains
✓not_contains
(empty output)
Judge: The output is completely empty, failing to provide any rewritten message despite clear task requirements.
Frequently asked
▸What does this prompt test?
Rewrite: Genuinely friendly tone, all facts kept (date, times, floor, alternative kitchen), under 80 words, no banned words. The deterministic checks are max_words, contains, contains, not_contains, not_contains.
▸Which model should I pick for this task?
If the judge's bar of 8/10 is good enough for you, Qwen3.8 Flash at $0.31 per 1,000 runs. If you need the top score, Qwen3.8 Flash at $0.31 per 1,000 runs.
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