Ling 3.1 Flash vs Spark X2.6 4B
Task by task
A score turns orange only when that model wins clearly more of the task's test cases. Under each score, the average time per test case on the machine it ran on. Spark X2.6 4B spends 1.2× as many thinking tokens per test case.
TaskALing 3.1 FlashBSpark X2.6 4B
Overall
451m 16s
151m 3s
Agents
4155.9s
141m 32s
Structured Extraction
711m 11s
1039.5s
Coding
241m 42s
41m 8s
Grounded Answers
5258.9s
1050.2s
Instruction Following
761m 55s
371m 29s
Business Logic
381m 22s
1036.3s
Security & permissions
5456.1s
3154.3s
Diagnosis & investigation
042.1s
01m 30s
What you'd run
The build behind each score. Orange marks the faster, smaller, cheaper or longer-context side.
SpecALing 3.1 FlashBSpark X2.6 4B
Speed
112 tok/s
136 tok/s
Machine
Hosted
RTX 5090, 32 GB
Memory at 32K
—
9.4 GB
Context
256K
605K (better)
Cost per run
Not measured
$1.61 est.
Cost per case
Not measured
$0.011 est.
Time per case
1m 16s
1m 3s (better)
Quantization
—
BF16
Harness
openrouter
llama.cpp
The race
Each model's running score as the test cases go by. The dashed line is a perfect run.
Every test case
Each square is one test case, colored by the model that scored higher.
Agents
Structured Extraction
Coding
Grounded Answers
Instruction Following
Business Logic
Security & permissions
Diagnosis & investigation