Run: 2026-02-18-01KHQ91AW4MRKDAP28KVH5BKCY

Run Details

Model:
Claude Sonnet 4.6
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
2.8s
Cost:
$0.001362
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
The rain fell without mercy. Detective Clara wiped her brow. A body lay there still. Blood pooled on cold stone. Nobody heard the fatal scream. Clara knelt beside the victim. His eyes stared at nothing. A rose sat beside him. Strange symbols marked his coat. Clara reached for her phone. The night grew even colder. Someone had planned this carefully.
created_at"2026-02-18T02:25:04.182478+00:00" 2/18/2026, 2:25:04 AM
model"anthropic/claude-4.6-sonnet-20260217"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency422
moderation_latency(null)
generation_time2768
tokens_prompt46
tokens_completion88
native_tokens_prompt44
native_tokens_completion82
native_tokens_completion_images(null)
native_tokens_reasoning0
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"stop"
usage0.001362
router(null)
provider_responses
0
id"msg_019tz4GjyQeYHnAAbpfSLLTX"
status200
is_byokfalse
latency412
endpoint_id"6d408764-7dd7-4626-bb87-a6cc1589bc86"
provider_name"Anthropic"
model_permaslug"anthropic/claude-4.6-sonnet-20260217"
api_type"completions"
id"gen-1771381500-vYB0vlT9Pkyw1LvufW9R"
upstream_id"msg_019tz4GjyQeYHnAAbpfSLLTX"
total_cost0.001362
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic"

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