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Run: 2026-07-09-01KX41EZ8K9AMHJ7DNE5V825K7
Run Details
Model:
GPT-5.6 Terra (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
8.9s
Cost:
$0.017128
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 20 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
Rain hammered Blackthorn Manor as Inspector Vale arrived, summoned by a telephone call that ended with a single terrified scream. The butler admitted him silently, his white gloves stained crimson, while thunder swallowed the questions gathering behind Vale's careful teeth. In the library, Lord Ashcombe lay beside the fireplace, his antique watch stopped precisely at eleven minutes past midnight, inexplicably. Five guests waited nearby, each claiming innocence, yet nobody mentioned the locked door, the missing key, or the unlit candles. Vale knelt carefully, noticing mud beneath the corpse's fingernails and a silver button clenched tightly within his frozen still hand. Then the grandfather clock chimed once, though its pendulum hung motionless, and every guest turned toward the darkened hallway nearby. From upstairs came the slow scrape of furniture, followed by a woman's whisper: “He was dead before you arrived tonight.” Vale rose, pocketed the button, and understood that the murderer had expected him, perhaps even invited him here tonight personally.
created_at
"2026-07-09T18:15:26.747Z"
7/9/2026, 6:15:26 PM
model
"openai/gpt-5.6-terra-20260709"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
3180
moderation_latency
(null)
generation_time
8463
tokens_prompt
46
tokens_completion
567
native_tokens_prompt
41
native_tokens_completion
1135
native_tokens_completion_images
0
native_tokens_reasoning
925
native_tokens_cached
0
num_media_prompt
(null)
num_input_audio_prompt
(null)
num_media_completion
0
num_search_results
(null)
num_fetches
(null)
web_search_engine
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"completed"
service_tier
"default"
usage
0.0171275
router
(null)
provider_responses
0
endpoint_id
"3cc89000-ae34-4dde-9c7d-5ce009c8af0b"
id
"resp_070c3b885c6288fc016a4fe53ee0b8819091edbfe902a684b6"
is_byok
false
latency
280
model_permaslug
"openai/gpt-5.6-terra-20260709"
provider_name
"OpenAI"
status
200
user_agent
"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer
(null)
request_id
"req-1783620926-ns5VpkXcNzoSFG3o5Yiq"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1783620926-5DXhkgKhfpdjnrt59XJJ"
upstream_id
"resp_070c3b885c6288fc016a4fe53ee0b8819091edbfe902a684b6"
total_cost
0.0171275
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
response_cache_source_id
(null)
data_region
"global"
Evaluation details
Result
Evaluator
Details
Meta Data
100.00%
Matches word count
n/a
neededClean
false
sentences
8
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20
7
20