Rewrite · 5 checks · max 400 tokens · benched 2026-09-16

GLM 5.3 vs GLM 5.2 vs GLM 5.3 Flash on rewrite a stiff notice in a friendly tone

Z Ai models side by side on "Rewrite a stiff notice in a friendly tone": GLM 5.3 Flash scores 10/10; GLM 5.3 Flash is the cheapest answer scoring 8+ at $0.03 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.

GLM 5.3

z-ai/glm-5.3

10/10

Latency: 465ms
Cost: $0.00047
Per 1,000: $0.47

124 in · 68 out (1 reasoning) · 49 words · checks 4/5

max_words
contains
contains
not_contains
not_contains

Heads up, everyone! The third-floor kitchen will be closed on Friday 3 October from 08:00 to 11:00 for electrical maintenance. Need a coffee or to heat your lunch? The second-floor kitchen will be open as usual. Thanks so much for your patience while we get this work done! ☕

Judge: Perfectly rewrites the notice in warm, friendly plain English, includes all facts (date, time, floors, reason), stays well under 80 words (62 words), avoids banned words, and uses appropriate tone with emoji.

GLM 5.2

z-ai/glm-5.2

10/10

Latency: 808ms
Cost: $0.00224
Per 1,000: $2.24

124 in · 1082 out (1022 reasoning) · 44 words · checks 5/5

max_words
contains
contains
not_contains
not_contains

Hi everyone! Just a quick heads-up: the third-floor kitchen will be closed on Friday 3 October from 08:00 to 11:00 for scheduled electrical maintenance. Please feel free to use the kitchen on the second floor during that time. Thanks so much for your cooperation!

Judge: Perfectly rewrites the notice in warm, friendly plain English, includes all facts (date, time, floors, reason), stays well under 80 words (47 words), avoids banned words, and maintains professional appropriateness.

GLM 5.3 Flash

z-ai/glm-5.3-flash

10/10

top judge scorecheapest scoring 8+

Latency: 425ms
Cost: $2.8e-5
Per 1,000: $0.03

124 in · 76 out · 53 words · checks 5/5

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, while electrical maintenance is carried out. Not to worry — you're welcome to use the kitchen on the second floor instead. Thanks so much for your understanding, and sorry for any inconvenience! 😊

Judge: Perfectly rewrites the notice in warm, friendly plain English, includes all facts (date, time, floors, reason), stays well under 80 words (67 words), avoids banned words, and maintains genuine friendliness throughout.

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, GLM 5.3 Flash at $0.03 per 1,000 runs. If you need the top score, GLM 5.3 Flash at $0.03 per 1,000 runs.

Same prompt, other families

Run it yourself

Re-run this prompt on Z Ai with your own OpenRouter key, or tweak the wording and see what changes.

Side by side

GLM 5.3

GLM 5.2

GLM 5.3 Flash

Frequently asked

Same prompt, other families

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