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Summarise · 3 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 one-sentence changelog summary

Alibaba models side by side on "One-sentence changelog summary": Qwen3.8 Flash scores 9/10; Qwen3.8 Flash is the cheapest answer scoring 8+ at $0.15 per 1,000 runs. Outputs, checks, judge reasons, latency and cost.

The prompt every model received

User

Summarise this release note in one sentence of at most 30 words. Output only the sentence.

Release 4.7.0: The public API now enforces a rate limit of 600 requests per minute per key (previously unlimited). Requests over the limit return HTTP 429 with a Retry-After header. Webhook deliveries are now signed with HMAC-SHA256 and the old unsigned mode will be removed in 4.9. We also fixed a bug where exporting more than 10,000 rows produced an empty file.

Rubric for the judge: A single accurate sentence that prioritises the rate limit and signed webhooks; no bullet list, no preamble.

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
1.4s
Cost
$0.00125
Per 1,000
$1.25

170 in · 151 out (116 reasoning) · 19 words · checks 2/3

  • max_words
  • contains
  • regex
Release 4.7.0 adds API rate limiting, HMAC-SHA256 webhook signing, and fixes a bug where large exports produced empty files.

Judge: Accurate single sentence under 30 words (17 words) that prioritises rate limiting and webhook signing as required, with no preamble or bullet list.

Qwen3.8 27B

qwen/qwen3.8-27b

9/10
Latency
958ms
Cost
$0.00082
Per 1,000
$0.82

161 in · 307 out (191 reasoning) · 21 words · checks 2/3

  • max_words
  • contains
  • regex


Release 4.7.0 introduces a 600 requests-per-minute rate limit, HMAC-SHA256 webhook signing, and fixes a bug where large exports produced empty files.

Judge: Accurate single sentence under 30 words (24 words), prioritizes rate limit and webhook signing as required, no preamble or bullets, minor: could emphasize deprecation timeline more explicitly.

Qwen3.8 Flash

qwen/qwen3.8-flash

9/10
top judge scorecheapest scoring 8+
Latency
718ms
Cost
$0.00015
Per 1,000
$0.15

182 in · 270 out (224 reasoning) · 18 words · checks 2/3

  • max_words
  • contains
  • regex
Release 4.7.0 adds a 600-request-per-minute API rate limit, HMAC-SHA256 webhook signing, and fixes empty exports over 10,000 rows.

Judge: Accurate single sentence under 30 words (19 words), prioritizes rate limit and webhook signing as required, no preamble or bullets, though could have mentioned HTTP 429 for completeness.

Qwen3.7 Plus

qwen/qwen3.7-plus

9/10
Latency
1.9s
Cost
$0.00186
Per 1,000
$1.86

131 in · 1421 out (1386 reasoning) · 19 words · checks 2/3

  • max_words
  • contains
  • regex
Release 4.7.0 adds API rate limiting, HMAC-SHA256 webhook signing, and fixes a bug causing empty exports for large datasets.

Judge: Accurate single sentence under 30 words (17 words) that prioritises rate limiting and webhook signing as required, with no preamble or bullet list.

Frequently asked

What does this prompt test?

Summarise: A single accurate sentence that prioritises the rate limit and signed webhooks; no bullet list, no preamble. The deterministic checks are max_words, contains, regex.

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 $0.15 per 1,000 runs. If you need the top score, Qwen3.8 Flash at $0.15 per 1,000 runs.

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