Run: 2026-10-08-01M4DA2A087X0PDW51PY1YE0JJ

Run Details

Duration:
3.0s
Cost:
$0.000138
Provider:
Claude Platform on AWS

Evaluation summary

Score Evaluator
Details Link
87.04% 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 steadily on the sleeping village below. Inspector Harold Vance pulled his collar tight against the wind. Nobody had expected a body in the old mill that morning. The victim lay face down beside the rusted water wheel. A single silver key rested beneath her outstretched left hand. Sergeant Mary Doyle knelt carefully beside the still figure. "She has been dead for roughly six hours," she murmured quietly. Vance noticed the muddy footprints leading toward the riverbank. They were small, neat, and oddly deliberate in their spacing. Someone had walked away from this place with great care. Across the water, a lamp flickered in the Ashworth manor window. Vance remembered that Eleanor Ashworth had vanished three nights ago.
created_at"2026-10-08T08:28:51.601Z" 10/8/2026, 8:28:51 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency782
moderation_latency(null)
generation_time2966
tokens_prompt46
tokens_completion188
native_tokens_prompt62
native_tokens_completion263
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"
usage0.0001377
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791448131-TT5QmENuv2OV32JGpILG"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791448131-4UyD4ePzbcR3Y9LWmyTY"
upstream_id"msg_011CfpTMAwvUicKSHEs3FpdU"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpTMAwvUicKSHEs3FpdU"
is_byokfalse
latency782
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0001377
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
87.04% Matches word count n/a
neededCleanfalse
sentences12
wordCounts
09
110
211
310
410
59
611
79
810
910
1011
1110