Run: 2026-10-08-01M4DA5FEK2WWK4NZS4VR53MD5

Run Details

Duration:
7.4s
Cost:
$0.000588
Provider:
Claude Platform on AWS

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
The rain fell hard tonight. Detective Mara Voss arrived late. Blood pooled beneath the desk. Ashcroft lay motionless on carpet. Officer Briggs guarded the doorway. Nobody had touched the glass. Mara knelt beside the body. Three guests had lied already. The wall clock had stopped. Someone had wanted that hour. Mara reached for her notebook. Let us begin, then, quietly.
created_at"2026-10-08T08:30:35.482Z" 10/8/2026, 8:30:35 AM
model"anthropic/claude-haiku-5.5-20261007"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency2271
moderation_latency(null)
generation_time7356
tokens_prompt46
tokens_completion202
native_tokens_prompt62
native_tokens_completion1164
native_tokens_completion_images(null)
native_tokens_reasoning1007
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"
usage0.0005882
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.21.0; linux; x64))"
http_referer(null)
request_id"req-1791448235-AdmNnwbJYdSzpyDt7gX8"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1791448235-LgI0ijHdGO5NNlb9JqPB"
upstream_id"msg_011CfpTUpqvB5S4ky3yrt5gf"
provider_responses
0
endpoint_id"b6cdf493-3a61-441f-a134-e7944fddb980"
id"msg_011CfpTUpqvB5S4ky3yrt5gf"
is_byokfalse
latency736
model_permaslug"anthropic/claude-haiku-5.5-20261007"
provider_name"Claude Platform on AWS"
status200
total_cost0.0005882
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
100.00% Matches word count n/a
neededCleanfalse
sentences12
wordCounts
05
15
25
35
45
55
65
75
85
95
105
115