Run: 2026-02-20-01KHY90ECP4ZAX7889QJSYX14P

Run Details

Model:
Grok 4
Test:
Data extraction
Scenario:
What instrument does Lucy play?
Duration:
9.7s
Cost:
$0.005166
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
Pass Matches text (details)
Pass Matches Regex (details)
no eval Overall

Model input

User/Human
What instrument does Lucy play based on the following text? Only return the instrument, nothing else. In the school band, there are four instruments: drums, bass, flute, trumped. John plays the drums, Mary plays the flute, and Pete plays the trumpet. Lucy doesn't play a wind instrument.

Model response

AI
bass
created_at"2026-02-20T19:39:12.673Z" 2/20/2026, 7:39:12 PM
model"x-ai/grok-4-07-09" 4/7/2009, 12:00:00 AM
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency9545
moderation_latency(null)
generation_time9668
tokens_prompt75
tokens_completion1
native_tokens_prompt745
native_tokens_completion307
native_tokens_completion_images0
native_tokens_reasoning306
native_tokens_cached744
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"completed"
usage0.005166
router(null)
provider_responses
0
endpoint_id"d40bef9d-6936-4c57-9749-bf7399de4a77"
id"6f7d4a2e-ff13-49a4-a296-6af31626c5df"
is_byokfalse
latency1136
model_permaslug"x-ai/grok-4-07-09" 4/7/2009, 12:00:00 AM
provider_name"xAI"
status200
api_type"completions"
id"gen-1771616352-MNc8pDsrqNCZyDhuIsFi"
upstream_id"6f7d4a2e-ff13-49a4-a296-6af31626c5df"
total_cost0.005166
cache_discount0.001674
upstream_inference_cost0
provider_name"xAI"

Evaluation details

Result Evaluator Details Meta Data
Pass Matches text
Case insensitive: bass
 n/a
Pass Matches Regex
/\bbass\b/i
 n/a
no eval