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

Qwen3.8 Max (0902) vs Qwen3.8 27B vs Qwen3.8 Flash vs Qwen3.7 Plus on jargon to plain english for a 12-year-old

Alibaba models side by side on "Jargon to plain English for a 12-year-old": Qwen3.8 Flash scores 9/10; Qwen3.8 Flash is the cheapest answer scoring 8+ at $0.30 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.

Qwen3.8 Max (0902)

qwen/qwen3.8-max-0902

9/10

Latency: 1.7s
Cost: $0.00183
Per 1,000: $1.83

148 in · 256 out (197 reasoning) · 47 words · checks 6/6

max_words
contains
contains
not_contains
not_contains
not_contains

Our new battery uses a solid material inside instead of liquid, which helps it store more energy and stay cool. This means electric cars can drive 40% farther on a single charge. It's also much safer because it's less likely to catch fire compared to older batteries.

Judge: Excellent rewrite: simple vocabulary, includes 40% range gain and safety benefits, 48 words (well under 70), avoids all banned words, and is age-appropriate for a 12-year-old.

Qwen3.8 27B

qwen/qwen3.8-27b

9/10

Latency: 1.3s
Cost: $0.00138
Per 1,000: $1.38

139 in · 530 out (471 reasoning) · 49 words · checks 5/6

max_words
contains
contains
not_contains
not_contains
not_contains



Our new batteries use a solid material inside instead of liquid. This lets them hold 40% more power while staying cool and safe. That means electric cars can drive much farther on a single charge, and the batteries are far less likely to catch fire compared to older types.

Judge: Excellent rewrite: simple vocabulary, includes 40% range gain and safety benefits, avoids all banned words, and is 54 words—well under the 70-word limit with clear 12-year-old appropriate language.

Qwen3.8 Flash

qwen/qwen3.8-flash

9/10

top judge scorecheapest scoring 8+

Latency: 2.4s
Cost: $0.00030
Per 1,000: $0.30

160 in · 592 out (541 reasoning) · 40 words · checks 6/6

max_words
contains
contains
not_contains
not_contains
not_contains

Our new battery uses a solid material that helps electricity move instead of liquid. This lets it hold more energy and stay cooler, so a car can go 40% farther. It also makes fires less likely than older lithium-ion batteries.

Judge: Excellent simplification for a 12-year-old, includes the 40% range gain and safety benefit, avoids all banned words, and is 48 words—well under the 70-word limit; only minor issue is 'solid material' could be slightly clearer but is still age-appropriate.

Qwen3.7 Plus

qwen/qwen3.7-plus

1/10

failed: empty output (finish_reason length)

Latency: 1.9s
Cost: $0.00208
Per 1,000: $2.08

109 in · 1600 out (1600 reasoning) · 0 words · checks 4/6

max_words
contains
contains
not_contains
not_contains
not_contains

(empty output)

Judge: The output is completely empty, failing to provide any rewritten paragraph despite clear task requirements.

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, Qwen3.8 Flash at $0.30 per 1,000 runs. If you need the top score, Qwen3.8 Flash at $0.30 per 1,000 runs.

Same prompt, other families

Run it yourself

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

Side by side

Qwen3.8 Max (0902)

Qwen3.8 27B

Qwen3.8 Flash

Qwen3.7 Plus

Frequently asked

Same prompt, other families

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