Run: 2026-07-25-01KYCPM337QGB3C6WXCVSTJC0B

Run Details

Duration:
9.3s
Cost:
$0.008500
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
91.46% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 5 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The rain hadn't stopped yet. Detective Marlowe hated wet shoes. She stepped over the threshold. Blood pooled beneath the piano. The dead man wore tails. His left hand held sheet music. Someone had closed his eyes. That detail bothered her most. Killers rarely showed such tenderness. The room smelled of lilies. Forty chairs faced the stage. Every seat sat perfectly empty. The concert had ended early. A single glove lay discarded. Marlowe crouched beside the body. His pockets contained no wallet. Instead she found a photograph. Two children squinted at sunlight. Neither child was smiling much. She turned the picture over. Someone had written "forgive me." The handwriting looked recently shaky. Outside, thunder rolled through Chicago. Her partner arrived at midnight. "Wife says he never practiced." Marlowe studied the man's fingers. Callused, worn, undeniably a pianist's. Somebody here was still lying.
created_at"2026-07-25T13:14:51.885Z" 7/25/2026, 1:14:51 PM
model"anthropic/claude-opus-5-20260723"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2181
moderation_latency(null)
generation_time9179
tokens_prompt46
tokens_completion228
native_tokens_prompt60
native_tokens_completion328
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"
usage0.0085
router(null)
provider_responses
0
endpoint_id"76cb4608-f48c-483d-8da8-9957fb44244e"
id"msg_011CdNqVTZoGQY1aofkVASaj"
is_byokfalse
latency2181
model_permaslug"anthropic/claude-opus-5-20260723"
provider_name"Amazon Bedrock"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer(null)
request_id"req-1784985291-D6yDMoMV5Ll32oyihq9Y"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1784985291-WcYtin06AbG78GoBtN5V"
upstream_id"msg_011CdNqVTZoGQY1aofkVASaj"
total_cost0.0085
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
91.46% Matches word count n/a
neededCleanfalse
sentences26
wordCounts
05
15
25
35
45
56
65
75
85
95
105
115
125
135
145
155
165
175
185
195
2010
215
225
2310
245
255