Run: 2026-10-08-01M4DAE919207PR8ENMWMTAEYR

Run Details

Duration:
8.3s
Cost:
$0.001105
Provider:
Claude Platform on AWS

Evaluation summary

Score Evaluator
Details Link
91.67% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The cold rain fell hard on Ashford Manor that night. Detective Mara Quinn stepped slowly from her battered black sedan. Lord Edmund Vale had been found dead in his library. Nobody had touched the body since the young constable arrived. Mara knelt beside the armchair and studied the dark stain. Two untouched teacups sat on the tray, one still steaming. Someone had poured tea for two people that very evening. Yet the household swore only the victim had been home. Mara lifted the cup carefully, sniffing the bitter almond scent. Behind her, the heavy oak door creaked slowly open again. A man's voice said quietly, "You shouldn't be touching that." Mara turned slowly, already reaching inside for her silver badge. Fifteen minutes later, that same man would be dead too.
created_at"2026-10-08T08:35:23.826Z" 10/8/2026, 8:35:23 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency8227
moderation_latency(null)
generation_time8227
tokens_prompt46
tokens_completion193
native_tokens_prompt62
native_tokens_completion2198
native_tokens_completion_images(null)
native_tokens_reasoning1931
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"end_turn"
service_tier"default"
usage0.0011052
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791448523-TUqCF2caD11IcOyzOvZI"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791448523-rLD194Cc4VsusgEGip6Q"
upstream_id"msg_011CfpTr5YnVQoJdUNyoRs2C"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpTr5YnVQoJdUNyoRs2C"
is_byokfalse
latency679
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0011052
cache_discount(null)
upstream_inference_cost0
provider_name"Claude Platform on AWS"
response_cache_source_id(null)
data_region"global"
workspace_id"97e315e5-d303-487d-83c1-83180e8a13d4"

Evaluation details

Result Evaluator Details Meta Data
91.67% Matches word count n/a
neededCleanfalse
sentences12
wordCounts
010
110
210
310
410
510
610
710
810
910
1020
1110