Run: 2026-07-25-01KYCPX78MYYV0H6C5DWM8KQ4E

Run Details

Duration:
7.9s
Cost:
$0.007325
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
100.00% 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
Rain hammered the observatory dome. Inspector Vance climbed slick stairs. The door hung wide open. Inside, brass instruments gleamed coldly. A telescope pointed at nothing. Dr. Halloway lay beneath it. Blood pooled around his shoulders. His right hand clutched chalk. Numbers covered the wooden floor. Someone had smudged them deliberately. Vance crouched beside the body. The chalk was still warm. Wind screamed through broken glass. Three teacups sat on shelves. Each held a different residue. Vance counted the porcelain saucers. Only two matched the cups. Footprints tracked toward the balcony. They stopped before the railing. Nobody had jumped that night. Vance studied the smudged equations. One symbol remained perfectly legible. It was not a number. It was a person's initials.
created_at"2026-07-25T13:19:51.067Z" 7/25/2026, 1:19:51 PM
model"anthropic/claude-opus-5-20260723"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2121
moderation_latency(null)
generation_time7763
tokens_prompt46
tokens_completion197
native_tokens_prompt60
native_tokens_completion281
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"
usage0.007325
router(null)
provider_responses
0
endpoint_id"76cb4608-f48c-483d-8da8-9957fb44244e"
id"msg_011CdNqsWW1zPr6FLK6rstFM"
is_byokfalse
latency2121
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-1784985591-k9PzFni1qS54Yz2SLqMC"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1784985591-GqwMtXYRnVnWhsbh54ST"
upstream_id"msg_011CdNqsWW1zPr6FLK6rstFM"
total_cost0.007325
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
100.00% Matches word count n/a
neededCleanfalse
sentences24
wordCounts
05
15
25
35
45
55
65
75
85
95
105
115
125
135
145
155
165
175
185
195
205
215
225
235