Run: 2026-05-01-01KQHSBCF3R6YYMHVVXN31Q98S

Run Details

Duration:
26.5s
Cost:
$0.006737
Provider:
xAI

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

Model response

AI
The old mansion stood ominously on the hilltop as the storm raged fiercely throughout the entire dark countryside around it. A loud piercing scream immediately echoed through the halls alerting all the residents to the horrible murder that had occurred. The butler rushed into the room and discovered his master lying in a pool of blood with a knife nearby. Everyone gathered around the body in shock wondering who could have committed such a heinous act in their midst tonight. The inspector arrived shortly thereafter and began examining all the evidence carefully looking for any clues left by the killer.
created_at"2026-05-01T12:48:51.689Z" 5/1/2026, 12:48:51 PM
model"x-ai/grok-4.20-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency25653
moderation_latency(null)
generation_time26390
tokens_prompt46
tokens_completion781
native_tokens_prompt159
native_tokens_completion2669
native_tokens_completion_images(null)
native_tokens_reasoning2557
native_tokens_cached128
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"
usage0.00673685
router(null)
provider_responses
0
endpoint_id"3ecee37f-b217-4093-87fb-aaf0afe307af"
id"a5cd9e10-3d4e-fa23-56c9-07f13db860b8"
is_byokfalse
latency58
model_permaslug"x-ai/grok-4.20-20260309"
provider_name"xAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer(null)
request_id"req-1777639731-2wKkiZNYgTRcZlLlAn0j"
session_id(null)
api_type"completions"
id"gen-1777639731-gcQaL3Jb2e4XOqayvFFp"
upstream_id"a5cd9e10-3d4e-fa23-56c9-07f13db860b8"
total_cost0.00673685
cache_discount0.0001344
upstream_inference_cost0
provider_name"xAI"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences5
wordCounts
020
120
220
320
420