Run: 2026-10-08-01M4E3EVNB1JVQK6DRF7ETB6AS

Run Details

Duration:
2.5s
Cost:
$0.000122
Provider:
Claude Platform on AWS

Evaluation summary

Score Evaluator
Details Link
73.16% 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 rain fell hard on Ashford Manor tonight. Detective Clara Vance stepped carefully through the muddy garden gate. Lord Edmund Hale had been found dead beside the fountain. Nobody in the household had heard a single scream. Her flashlight swept across the wet, silent marble statues. Officer Tom Briggs handed her a damp leather glove. "Someone wore this during the struggle," he whispered nervously. Clara noticed a faint scent of lilac lingering nearby. The victim's wife, Margaret, stood trembling beneath the portico. She clutched a teacup that had long since gone cold. Clara knew this case would not be simple.
created_at"2026-10-08T15:52:37.303Z" 10/8/2026, 3:52:37 PM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2486
moderation_latency(null)
generation_time2488
tokens_prompt46
tokens_completion157
native_tokens_prompt62
native_tokens_completion231
native_tokens_completion_images(null)
native_tokens_reasoning0
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"
usage0.0001217
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791474757-HrSXbUWL3itVFswQqfTF"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791474757-BaZMGkdqV3L326U6DfRJ"
upstream_id"msg_011Cfq3BsG1eQjEFG43Qt9nx"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011Cfq3BsG1eQjEFG43Qt9nx"
is_byokfalse
latency759
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0001217
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
73.16% Matches word count n/a
neededCleanfalse
sentences11
wordCounts
08
110
210
39
49
59
69
79
89
910
108