Rewrite · 6 checks · max 400 tokens · benched 2026-09-16

GLM 5.3 vs GLM 5.2 vs GLM 5.3 Flash on jargon to plain english for a 12-year-old

Z Ai models side by side on "Jargon to plain English for a 12-year-old": GLM 5.3 Flash scores 9/10; GLM 5.3 Flash is the cheapest answer scoring 8+ at $0.02 per 1,000 runs. Outputs, checks, judge reasons, latency and cost.

The prompt every model received

User

Rewrite this paragraph so a 12-year-old would understand it. Keep it under 70 words and do not use the words "leverage", "synergy" or "paradigm". Output only the rewritten paragraph.

Paragraph: Our next-generation battery architecture leverages a solid-state electrolyte paradigm to achieve synergy between energy density and thermal stability, enabling a 40% increase in range while mitigating the combustion risk profile associated with legacy lithium-ion chemistries.

Rubric for the judge: Simple vocabulary, keeps the 40% range gain and the safety point, under 70 words, banned words absent.

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

9/10

Latency: 259ms
Cost: $0.00048
Per 1,000: $0.48

107 in · 75 out · 63 words · checks 6/6

max_words
contains
contains
not_contains
not_contains
not_contains

Our new battery design uses a solid material instead of a liquid one inside the battery. This helps the battery store more power and stay safe from overheating at the same time. As a result, devices or cars using it can go 40% farther on a single charge, and there's much less risk of the battery catching fire compared to older lithium-ion batteries.

Judge: Excellent rewrite: simple vocabulary, includes 40% range gain and safety benefits, avoids all banned words, and is 59 words (under 70 limit); only minor issue is slight wordiness in phrasing.

GLM 5.2

z-ai/glm-5.2

9/10

Latency: 706ms
Cost: $0.00118
Per 1,000: $1.18

107 in · 558 out (496 reasoning) · 51 words · checks 6/6

max_words
contains
contains
not_contains
not_contains
not_contains

Our new battery design uses a solid material instead of a liquid to move electricity. This lets it hold more power and stay cool. Because of this, your device or car can go 40% farther on a single charge. Plus, it won't catch fire like the old liquid batteries sometimes do.

Judge: Excellent rewrite: simple vocabulary, includes 40% range gain and safety benefit, 59 words (under 70), avoids all banned words, and is clearly understandable for a 12-year-old.

GLM 5.3 Flash

z-ai/glm-5.3-flash

9/10

top judge scorecheapest scoring 8+

Latency: 1.3s
Cost: $2.3e-5
Per 1,000: $0.02

107 in · 61 out · 52 words · checks 6/6

max_words
contains
contains
not_contains
not_contains
not_contains

Our new battery design uses a special solid material inside instead of liquid. This helps the battery store more energy while staying safe and cool. Cars using it can drive 40% farther on a single charge. It's also much less likely to catch fire than the batteries used in most cars today.

Judge: Excellent rewrite: simple vocabulary, includes 40% range gain and safety benefits, avoids all banned words, and is 58 words (well under 70-word limit); only minor deduction for slightly simplifying the technical concept.

Frequently asked

What does this prompt test?

Rewrite: Simple vocabulary, keeps the 40% range gain and the safety point, under 70 words, banned words absent. The deterministic checks are max_words, contains, contains, not_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 $0.02 per 1,000 runs. If you need the top score, GLM 5.3 Flash at $0.02 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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