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

GPT-5.5 vs GPT-5.4 vs GPT-5.4 mini vs GPT-5.4 Nano vs GPT-5.3-Codex on jargon to plain english for a 12-year-old

OpenAI models side by side on "Jargon to plain English for a 12-year-old": GPT-5.4 Nano scores 9/10; GPT-5.4 Nano is the cheapest answer scoring 8+ at $0.09 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.

GPT-5.5

openai/gpt-5.5

9/10

Latency: 393ms
Cost: $0.00286
Per 1,000: $2.86

98 in · 79 out (19 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 power and stay cooler. This can let a device or vehicle go about 40% farther on one charge, while also making it less likely to catch fire than older lithium-ion batteries.

Judge: Excellent rewrite: simple vocabulary, includes 40% range gain and safety benefit, 58 words (under 70), avoids all banned words, and is age-appropriate for a 12-year-old.

GPT-5.4

openai/gpt-5.4

9/10

Latency: 483ms
Cost: $0.00138
Per 1,000: $1.39

98 in · 76 out (17 reasoning) · 47 words · checks 6/6

max_words
contains
contains
not_contains
not_contains
not_contains

Our new battery design uses a solid material inside instead of liquid, so it can store more energy and stay safer when it gets hot. This helps electric cars go about 40% farther on one charge and lowers the chance of fires compared with older lithium-ion batteries.

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

GPT-5.4 mini

openai/gpt-5.4-mini

9/10

Latency: 444ms
Cost: $0.00045
Per 1,000: $0.45

98 in · 83 out (25 reasoning) · 45 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 inside. This helps it store more energy and stay cooler and safer. It can make devices or cars go about 40% farther, while lowering the chance of fire compared with older lithium-ion batteries.

Judge: Excellent rewrite: simple vocabulary, includes 40% range gain and safety benefit, avoids all banned words, and is 54 words (well under 70-word limit), with only minor loss of technical precision acceptable for the 12-year-old audience.

GPT-5.4 Nano

openai/gpt-5.4-nano

9/10

top judge scorecheapest scoring 8+

Latency: 290ms
Cost: $9.3e-5
Per 1,000: $0.09

98 in · 59 out · 47 words · checks 6/6

max_words
contains
contains
not_contains
not_contains
not_contains

Our new battery design uses a special solid material instead of liquid. This helps the battery store more energy and stay cooler and safer. Because of this, cars can go about 40% farther than before. It also lowers the chance of fires compared with older lithium-ion batteries.

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

GPT-5.3-Codex

openai/gpt-5.3-codex

9/10

Latency: 428ms
Cost: $0.00135
Per 1,000: $1.35

98 in · 84 out (27 reasoning) · 45 words · checks 6/6

max_words
contains
contains
not_contains
not_contains
not_contains

Our new battery design uses a solid material instead of liquid parts, so it can store more power and stay safer at high temperatures. This gives electric cars about 40% more driving distance and lowers the chance of battery fires compared with older lithium-ion batteries.

Judge: Excellent rewrite: simple vocabulary, includes 40% range gain and safety benefits, avoids all banned words, and is 58 words—well under the 70-word limit with clear 12-year-old appropriate language.

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, GPT-5.4 Nano at $0.09 per 1,000 runs. If you need the top score, GPT-5.4 Nano at $0.09 per 1,000 runs.

Same prompt, other families

Run it yourself

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

Side by side

GPT-5.5

GPT-5.4

GPT-5.4 mini

GPT-5.4 Nano

GPT-5.3-Codex

Frequently asked

Same prompt, other families

Stop overpaying for AI tools