Run: 2026-04-24-01KQ0NXEV7QJD8D4NV0TPQQYVN

Run Details

Duration:
11.4s
Cost:
$0.017155
Provider:
OpenAI

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 stitched silver threads across Blackwell Manor's windows that midnight. Inspector Vale arrived late, summoned by bells nobody admitted ringing. Inside, the chandelier trembled above portraits with accusing glass eyes. Lady Blackwell lay beneath it, pearls scattered like frozen tears. Her right hand clutched a letter sealed with crimson wax. No blood marked her gown, only one darkening violet bruise. Around the body, five heirs practiced grief with perfect manners. The clock had stopped at twelve, though thunder continued counting. Vale noticed muddy footprints ending abruptly beside the locked library. Then the corpse's eyes opened, reflecting someone standing behind him.
created_at"2026-04-24T21:21:44.369Z" 4/24/2026, 9:21:44 PM
model"openai/gpt-5.5-20260423"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency10810
moderation_latency(null)
generation_time11167
tokens_prompt46
tokens_completion518
native_tokens_prompt41
native_tokens_completion565
native_tokens_completion_images0
native_tokens_reasoning433
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"completed"
usage0.017155
router(null)
provider_responses
0
endpoint_id"58e5b336-423e-430b-a2ab-8bc353f0c51b"
id"resp_0e37d1b16a6635940169ebdee889dc81949bc32d195fa3a0e0"
is_byokfalse
latency469
model_permaslug"openai/gpt-5.5-20260423"
provider_name"OpenAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer(null)
request_id"req-1777065704-JWlrgBcltANoSnJ8Kf3m"
session_id(null)
api_type"completions"
id"gen-1777065704-rIP6cnWDDqSg453Blb5T"
upstream_id"resp_0e37d1b16a6635940169ebdee889dc81949bc32d195fa3a0e0"
total_cost0.017155
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
010
110
210
310
410
510
610
710
810
910