Run: 2026-06-01-01KT1GWJ9VVGPE6VNZWFQ7NW6Q

Run Details

Duration:
41.2s
Cost:
$0.039075
Provider:
Anthropic

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 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain hammered the cold cobblestones outside the old Blackwood manor. Detective Hayes stepped slowly from his car into the storm. A single yellow light burned within the dark upstairs window. Inside, the lifeless body lay sprawled across the marble floor. Lord Blackwood would never host another extravagant dinner party again. Five frightened guests remained trapped inside by the raging storm. Each one harbored dark secrets worth killing to protect forever. Hayes knew the murderer was still hiding somewhere inside, watching.
created_at"2026-06-01T12:00:12.097Z" 6/1/2026, 12:00:12 PM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3084
moderation_latency173
generation_time41007
tokens_prompt46
tokens_completion268
native_tokens_prompt60
native_tokens_completion1551
native_tokens_completion_images(null)
native_tokens_reasoning130
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"
usage0.039075
router(null)
provider_responses
0
endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_017U9PAxpBwVZyCKbWwaL7CV"
is_byokfalse
latency971
model_permaslug"anthropic/claude-4.8-opus-20260528"
provider_name"Anthropic"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.16.0; linux; x64))"
http_referer(null)
request_id"req-1780315212-jCqDMwutORkoDWKMss4e"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1780315212-ttlWPaoArjvDIN5hU6zs"
upstream_id"msg_017U9PAxpBwVZyCKbWwaL7CV"
total_cost0.039075
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences8
wordCounts
010
110
210
310
410
510
610
710