Run: 2026-05-29-01KSSKA44GVXASQYGCRJK5HM33

Run Details

Duration:
5.7s
Cost:
$0.006450
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 5 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain hammered the old mansion. Detective Coles stepped through doors. The body lay face down. Blood pooled across the carpet. A single candle still burned. Someone had been here recently. The victim wore expensive jewelry. Nothing appeared to be stolen. Coles knelt beside the corpse. A note was clutched tightly. The handwriting looked strangely familiar. Outside, thunder cracked the sky. Five guests remained in residence. Each one had clear motives. Only one of them lied. The killer was still watching.
created_at"2026-05-29T10:08:38.039Z" 5/29/2026, 10:08:38 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3207
moderation_latency(null)
generation_time5667
tokens_prompt46
tokens_completion171
native_tokens_prompt60
native_tokens_completion246
native_tokens_completion_images(null)
native_tokens_reasoning44
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"
usage0.00645
router(null)
provider_responses
0
endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_01V85hV8BCfbjpMxDvrbMvdq"
is_byokfalse
latency1487
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-1780049318-ddr1UVaGc1onZbD6FGd3"
session_id(null)
api_type"completions"
id"gen-1780049318-90irqkgkC10TVMAVFozI"
upstream_id"msg_01V85hV8BCfbjpMxDvrbMvdq"
total_cost0.00645
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
sentences16
wordCounts
05
15
25
35
45
55
65
75
85
95
105
115
125
135
145
155