Seed 2.1 Pro

Name: Seed 2.1 Pro
Author: ByteDance

Multimodal

ByteDance

ByteDance's flagship next-generation agent model built for real-world productivity.

Key Specifications

Parameters

Context

Release Date

June 24, 2026

Average Score

63.7%

API Documentation Results Blog

Timeline

Key dates in the model's history

Announcement

June 24, 2026

Last Update

August 29, 2026

Technical Specifications

Parameters

Training Tokens

Knowledge Cutoff

Family

Capabilities

MultimodalZeroEval

Benchmark Results

Model performance metrics across various tests and benchmarks

Multimodal

Working with images and visual data

MathVista

• Self-reported

90.7%

Other Tests

Specialized benchmarks

AetherCode

• Self-reported

65.8%

Agents' Last Exam

Score • Self-reported

41.4%

Agent Startup Bench

• Self-reported

68.8%

APEX-Agents

• Self-reported

33.8%

ArcAGI2

• Self-reported

62.5%

Artifacts Bench

• Self-reported

51.0%

BabyVision

• Self-reported

73.7%

Beyond AIME

• Self-reported

87.0%

BLINK

• Self-reported

81.4%

BrowseComp

With search • Self-reported

86.2%

ChartQAPro

• Self-reported

70.9%

CharXiv-D

• Self-reported

95.5%

CharXiv-R

With tools • Self-reported

86.4%

ClawEval-MM

Pass^3 • Self-reported

51.0%

ContPhy

• Self-reported

63.6%

CreativeWork

• Self-reported

42.5%

CrossVid

• Self-reported

65.0%

CyberGym

• Self-reported

70.2%

DeepSWE

• Self-reported

32.7%

Doubao Multi-Turn Bench

• Self-reported

52.5%

DUDE

• Self-reported

82.8%

DynaMath

• Self-reported

73.1%

EmbSpatialBench

• Self-reported

83.4%

EMMA

• Self-reported

79.3%

ERQA

• Self-reported

72.0%

Finance Agent v1.1

• Self-reported

60.7%

FrontierCS

• Self-reported

46.3%

FrontierScience Olympiad

• Self-reported

75.0%

FrontierScience Research

• Self-reported

28.3%

GameWorld

• Self-reported

31.2%

GDPval

• Self-reported

87.9%

HorizonMath

• Self-reported

2.0%

Humanity's Last Exam

Text-only, with search • Self-reported

55.7%

Image2FloorPlan

• Self-reported

48.0%

IMO 2025

• Self-reported

65.2%

IMOProof-Adv

• Self-reported

54.3%

IPhO 2025

• Self-reported

79.3%

KINA

• Self-reported

48.3%

LiveMathematicianBench

• Self-reported

20.9%

LiveSports-3K

• Self-reported

76.8%

LongVideoBench

• Self-reported

80.6%

LVBench

• Self-reported

78.0%

MathArena Apex

• Self-reported

31.3%

MathVerse

Vision-Only • Self-reported

89.7%

MathVision

With tools • Self-reported

94.5%

MCP Atlas

• Self-reported

83.8%

MeasureBench

avg. real & synthetic • Self-reported

62.9%

Minerva

• Self-reported

70.7%

MMLongBench-128K

• Self-reported

78.3%

MMMU-Pro

With tools • Self-reported

82.7%

MMSIBench

Circular • Self-reported

35.9%

MobileWorld

• Self-reported

73.1%

MotionBench

• Self-reported

74.9%

MSQA

• Self-reported

50.2%

NL2Repo

• Self-reported

47.0%

OCRBench_V2

• Self-reported

63.2%

OfficeQA Pro

Multimodal • Self-reported

72.2%

OneMillion Bench

• Self-reported

68.8%

OSWorld

• Self-reported

78.8%

OVBench

• Self-reported

70.0%

OVOBench

• Self-reported

80.7%

PostTrainBench

• Self-reported

16.5%

PresentBench

• Self-reported

54.6%

Program Bench

• Self-reported

50.3%

RealWorldQA

• Self-reported

86.7%

Repo Env

• Self-reported

55.0%

SciCode

• Self-reported

59.8%

SeedClawBench

• Self-reported

66.6%

SimpleVQA

• Self-reported

74.5%

SuperChem

• Self-reported

59.8%

SuperGPQA

• Self-reported

70.8%

SWE-Atlas

• Self-reported

35.2%

SWE-Bench Pro

• Self-reported

57.5%

Terminal-Bench 2.1

• Self-reported

71.0%

TOMATO

• Self-reported

79.5%

Toolathlon

• Self-reported

50.6%

Trae Code Gen

JavaScript • Self-reported

62.4%

Trae Error Fix

Go • Self-reported

63.3%

TreeBench

• Self-reported

71.1%

TVBench

• Self-reported

80.5%

VideoHolmes

• Self-reported

68.2%

Video-MME

• Self-reported

89.2%

VideoSimpleQA

• Self-reported

76.4%

VisFactor

• Self-reported

51.4%

VisuLogic

• Self-reported

54.3%

VLMsAreBiased

• Self-reported

83.6%

Web Bench

• Self-reported

78.4%

WildClawBench

• Self-reported

61.7%

Workspace Bench

• Self-reported

53.0%

WorldBench

• Self-reported

67.6%

WorldVQA

• Self-reported

53.0%

xDailyBench

• Self-reported

61.0%

ZEROBench

• Self-reported

18.0%

License & Metadata

License

proprietary

Announcement Date

June 24, 2026

Last Updated

August 29, 2026

Compare Seed 2.1 Pro

All comparisons

vs Seed 2.1 Turbo vs Seed 2.0 Pro vs GPT-5.6 Sol vs Nemotron 3 Ultra (550B A55B)vs Muse Glimmer-30B vs Grok 4.6 vs Qwen3.8-27B vs Claude Fable 5

Similar Models

All Models

Seed 2.1 Turbo

ByteDance

Released:Jun 2026

Seedance 1.5 Pro

ByteDance

Released:Jan 1970

Seed 2.0 Pro

ByteDance

Best score:0.9 (GPQA)

Released:Feb 2026

Price:$0.50/1M tokens

Doubao Seed Code

ByteDance

Released:Mar 2026

GLM-5V-Turbo

Zhipu AI

Released:Apr 2026

Price:$1.20/1M tokens

GPT-5.1 Codex High

OpenAI

Released:Nov 2025

Price:$1.25/1M tokens

GPT-5.3 Codex

OpenAI

Released:Feb 2026

Price:$1.75/1M tokens

GPT-5.1 Codex

OpenAI

Released:Nov 2025

Price:$1.25/1M tokens

Recommendations are based on similarity of characteristics: developer organization, multimodality, parameter size, and benchmark performance. Choose a model to compare or go to the full catalog to browse all available AI models.