ByteDance Seed: Seed 2.1 Turbo

Seed 2.1 Turbo is a multimodal model from ByteDance Seed for coding and long-horizon agent workflows.

Context
262K
Max output
236K
Input price
$0.5/1M tokens
Output price
$2.5/1M tokens

Capabilities

Reasoning & Interaction
Reasoning
Tool Calling
Output Control
Structured Output
JSON Mode

Details

Model IDbytedance-seed/seed-2-1-turbo
Provider OpenRouter
Creator bytedance-seed
Family—
License—
Status—
Type—
Input modalitiestext, image, video
Output modalitiestext
Open weight—
Parameters—
Architecture—
Context window262K tokens
Max input—
Max output236K tokens
Reasoning tokens—
Knowledge cutoff—
Release date
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs

Pricing

Input
$0.5
Output
$2.5
Cache write
—
Cache read
—
Batch in
—
Batch out
—

API

GET/v1/models/openrouter/bytedance-seed/seed-2-1-turbo

ByteDance Seed: Seed 2.1 Turbo

bytedance-seed/seed-2-1-turbo

Seed 2.1 Turbo is a multimodal model from ByteDance Seed for coding and long-horizon agent workflows.

Changes · 3 entries
bytedance-seed/seed-2-1-turbocreateca7a400Nov 2, 2026, 03:02 AM
bytedance-seed/seed-2-1-turboupdatee3d7dedAug 31, 2026, 04:13 AM
max_output_tokens262144→235929
bytedance-seed/seed-2-1-turbocreate3cddff5Aug 13, 2026, 02:54 AM