Spark-X2.6-4B

Spark-X2.6-4B.

iFlytek Released 22 Oct 2026 Family Spark X2.6 The lab's model card

Benchmarks with a score

Ranked first, out of five or more models

In the top three

iFlytek Oct 2026

Open weights Small

No Epoch Capabilities Index score yet

Where it ranks

Its best score on each benchmark, and where that ranks among every model with a score there. We rank each model once, at its best setting.

Benchmark	Score	Rank	Source
IFEval	93.6%	#10 of 126	Model card
IFBench	75.8%	#22 of 70	Model card
Humanity's Last Exam	36.9%	#64 of 147	Model card
LongBench v2	53.3%	#18 of 27	Model card
GraphWalks	63.2%	#16 of 21	Model card
OpenAI MRCR v2	45.8%	#7 of 9	Model card
AA-LCR 1.1	67.3%	#5 of 5	Model card

Benchmark	Score	Rank	Source
GPQA Diamond	77.1%	#129 of 284	Model card
AIME 2026	91.2%	#26 of 34	Model card
HMMT 2026	81.3%	#16 of 18	Model card
IMO-AnswerBench	75.2%	#33 of 37	Model card
Gaokao Math 2026	134.9	#1 of 1	Model card

Benchmark	Score	Rank	Source
SWE-Bench Pro	54.3%	#51 of 77	Model card
SWE-bench Verified	62.8%	#101 of 150	Model card
SWE-bench Multilingual	64.7%	#52 of 70	Model card
SciCode	36.8%	#37 of 47	Model card

Benchmark	Score	Rank	Source
BFCL V4	71.8%	#6 of 24	Model card
tau2-bench	86.9%	#22 of 69	Model card
Claw-Eval	69.9%	#5 of 14	Model card
EnterpriseOps-Gym	33.6%	#1 of 2	Model card
BrowseComp	53.1%	#57 of 77	Model card
MCP Atlas	62.4%	#30 of 40	Model card
tau3-bench	34.7%	#11 of 12	Model card
PAgentBench	74.1%	#1 of 1	Model card
SWebBench	71.7%	#1 of 1	Model card
VitaBench 2.0	30.8%	#1 of 1	Model card

The benchmarks the lab chose to headline, with the scores it gave.