Run: 2026-10-08-01M4E0K27VR30JHRWSBQ64DWKS

Run Details

Duration:
3.0s
Cost:
$0.000156
Provider:
Claude Platform on AWS

Evaluation summary

Score Evaluator
Details Link
56.27% 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 hammered against the windows of Blackwood Manor. Detective Clara Vance stepped through the doorway, shaking water from her coat. Nobody had touched the body since the scream echoed. Her partner, Sergeant Miles Holloway, waited near the staircase. He looked pale beneath the flickering chandelier light. "The victim is Edmund Ashcroft, the family solicitor." Clara knelt beside the library desk and studied him. Ink stains marked his fingers, and a letter lay open. Someone had carefully folded the envelope before leaving it there. Clara noticed a single muddy footprint beside the rug. It pointed toward the servants' stairwell, not the front door. Miles cleared his throat behind her. "The housekeeper swears she heard two voices arguing." Clara rose slowly and turned toward the dim hallway. "Then somebody in this house is lying to us," she said.
created_at"2026-10-08T15:02:29.383Z" 10/8/2026, 3:02:29 PM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2976
moderation_latency(null)
generation_time2976
tokens_prompt46
tokens_completion215
native_tokens_prompt62
native_tokens_completion300
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"
usage0.0001562
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791471749-mKtGCay0lhWYVVNcrwXO"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791471749-PNhjZVoV56jlM2QJT3p3"
upstream_id"msg_011CfpyN9UeHT9P2HJXRNqtu"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpyN9UeHT9P2HJXRNqtu"
is_byokfalse
latency946
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0001562
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
56.27% Matches word count n/a
neededCleanfalse
sentences13
wordCounts
09
112
29
39
48
517
610
710
89
910
106
1117
1211