Seed2.1 Pro

Seed2.1 Pro ranks first on 16 of the 72 benchmarks it has scores on.

ByteDance Seed Released 23 Jun 2026 Family Seed 2 The lab's model card

101

Benchmarks with a score

Ranked first, out of five or more models

In the top three

ByteDance Seed Jun 2026

Closed weights Flagship

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
Humanity's Last Exam	55.7%	#21 of 147	Model card
SimpleVQA	74.5%	#4 of 23	Model card
SuperGPQA	70.8%	#5 of 26	Model card
MMLongBench	78.3%	#1 of 4	Model card
Video SimpleQA	76.4%	#1 of 4	Model card
HLE-Verified	42.9%	#4 of 4	Model card
Doubao Multi-Turn Bench	52.5%	#1 of 1	Model card
KINA	48.3%	#1 of 1	Model card
MSQA	50.2%	#1 of 1	Model card
xDailyBench	61%	#1 of 1	Model card

Benchmark	Score	Rank	Source
Beyond AIME	87%	#1 of 14	Model card
FrontierScience	75%	#2 of 7	Model card
ARC-AGI-2	62.5%	#10 of 22	Model card
FrontierScience-Olympiad	75%	#1 of 2	Model card
xbench-ScienceQA	71%	#15 of 29	Official leaderboard
FrontierScience-Research	28.3%	#2 of 3	Model card
MathArena (Apex, IMO, USAMO)	31.3%	#10 of 13	Model card
IMO-ProofBench	54.3%	#4 of 5	Model card
IMO 2025	65.2%	#5 of 6	Model card
ExplorationBench	40%	#9 of 10	Official leaderboard
HorizonMath	2.00%	#3 of 3	Model card
IPhO 2025	79.3%	#1 of 1	Model card
LiveMathematicianBench	20.9%	#1 of 1	Model card

Benchmark	Score	Rank	Source
SciCode	59.8%	#1 of 47	Model card
AetherCode	65.8%	#1 of 3	Model card
Code Arena	1,519	#50 of 124	Official leaderboard
SWE-Bench Pro	57.5%	#35 of 77	Model card
Monthly-SWEBench	53%	#6 of 12	Official leaderboard
NL2Repo-Bench	47%	#15 of 28	Model card
ProgramBench	50.3%	#13 of 20	Model card
Image-to-WebDev Arena	1,510	#37 of 55	Official leaderboard
EvoCode-Bench v2	6.70%	#11 of 13	Official leaderboard
SWE Atlas	35.2%	#10 of 11	Model card
DeepSWE	32.7%	#49 of 51	Model card
PostTrainBench	16.5%	#7 of 7	Model card

Benchmark	Score	Rank	Source
OSWorld	78.8%	#1 of 12	Model card
MCP Atlas	83.8%	#6 of 40	Model card
BrowseComp	86.2%	#16 of 77	Model card
SkillsBench	60.4%	#4 of 13	Model card
WildClawBench	61.7%	#2 of 5	Model card
Toolathlon	50.6%	#19 of 37	Model card
Terminal-Bench 2.1	71%	#34 of 53	Model card
MobileWorld	73.1%	#2 of 3	Model card
Long-Horizon-Terminal-Bench 2.0	46.4%	#11 of 15	Official leaderboard
Long-Horizon-Terminal-Bench (LHTB)	28.6%	#19 of 25	Official leaderboard
CreativeWork	42.5%	#1 of 1	Model card
GameWorld	31.2%	#1 of 1	Model card
SeedClawBench	66.6%	#1 of 1	Model card

Benchmark	Score	Rank	Source
GDPval	87.9%	#1 of 10	Model card
OfficeQA Pro	70.9%	#2 of 14	Model card
APEX-Agents	33.8%	#6 of 12	Model card
$OneMillion-Bench	23.7%	#8 of 13	Official leaderboard
Vals Finance Agent	60.7%	#5 of 8	Model card
BlenderWorld	51.3	#9 of 13	Official leaderboard
Agents' Last Exam	19.5%	#25 of 25	Model card
PresentBench	54.6%	#3 of 3	Model card
WorkSpaceBench	53%	#3 of 3	Model card
Agent Startup Bench	68.8%	#1 of 1	Model card

Benchmark	Score	Rank	Source
MathVista	90.7%	#1 of 64	Model card
BLINK	81.4%	#1 of 28	Model card
MMMU-Pro	82.7%	#3 of 72	Model card
MathVerse	89.7%	#1 of 12	Model card
LongVideoBench	80.6%	#1 of 11	Model card
Video-MME	89.2%	#4 of 42	Model card
MATH-Vision (MathVision)	94.5%	#5 of 42	Model card
CharXiv (DQ)	95.5%	#1 of 7	Model card
TreeBench	71.1%	#1 of 7	Model card
VisuLogic	54.3%	#1 of 7	Model card
ERQA	72%	#4 of 26	Model card
RealWorldQA	86.7%	#5 of 30	Model card
MINERVA	70.7%	#1 of 6	Model card
Video-Holmes	68.2%	#1 of 6	Model card
OVBench	70%	#1 of 5	Model card
OVO-Bench	80.7%	#1 of 5	Model card
TOMATO	79.5%	#1 of 5	Model card
MotionBench	74.9%	#2 of 9	Model card
CharXiv	86.4%	#15 of 67	Model card
LVBench	78%	#6 of 25	Model card
DUDE	82.8%	#1 of 4	Model card
TVBench	80.5%	#2 of 7	Model card
BabyVision	73.7%	#8 of 27	Official leaderboard
CrossVid	65%	#1 of 3	Model card
EMMA	79.3%	#1 of 3	Model card
MMSI-Bench	35.9%	#2 of 5	Model card
VLMsAreBiased	83.6%	#2 of 5	Model card
WorldVQA	53%	#4 of 9	Model card
OCRBench v2	63.2%	#9 of 20	Model card
DynaMath	73.1%	#8 of 17	Model card
ChartQA Pro	70.9%	#4 of 8	Model card
VisFactor	51.4%	#2 of 4	Model card
ZeroBench	22%	#16 of 25	Model card
ContPhy	63.6%	#2 of 3	Model card
EmbSpatialBench	83.4%	#7 of 10	Model card
Claw-Eval-MM	51%	#6 of 7	Model card
LiveSports-3K	76.8%	#4 of 4	Model card
Image2FloorPlan	48.0	#1 of 1	Model card
MeasureBench	62.9%	#1 of 1	Model card
WorldBench	67.6%	#1 of 1	Model card