Seed 2.1 Turbo- Context
- 256Ktokens
- Released
- 1y ago
Low-latency ByteDance Seed model for high-throughput chat, extraction, and lightweight tool use
- Multimodal model
- Accepts images
- Tools
- Structured output
How it compares
Additional source evidence
- Source model
- bytedance-seed/seed-1-6-flash
- Source family
- seed
- Last updated
- 2025-08-28
- Model context
- 256K
- Model output limit
- 32K
- Open weights
- No
- File attachments
- Yes
- Reasoning
- No
- Tool calling
- Yes
- Temperature control
- Yes
Complete source record (JSON)
{
"id": "bytedance-seed/seed-1-6-flash",
"name": "Seed 1.6 Flash",
"description": "Low-latency ByteDance Seed model for high-throughput chat, extraction, and lightweight tool use",
"family": "seed",
"last_updated": "2025-08-28",
"attachment": true,
"reasoning": false,
"tool_call": true,
"temperature": true,
"modalities": {
"input": [
"text",
"image",
"video"
],
"output": [
"text"
]
},
"limit": {
"context": 256000,
"output": 32000
},
"release_date": "2025-08-28",
"open_weights": false
}Frequently asked questions
Capabilities and specs
Seed 1.6 Flash has a context window of 256K tokens (256,000). Its maximum output is 32K tokens (32,000).
No. Seed 1.6 Flash accepts text and image input only, not audio, video or PDFs.
Yes, Seed 1.6 Flash supports tool calling (function calling).
Yes, Seed 1.6 Flash supports structured output, including JSON schema or JSON mode.
No, Seed 1.6 Flash does not have a reasoning or thinking mode.
Quality and benchmarks
Closest alternatives, matched on model kind and release date (no comparable price), are x-AI/Grok-Code-Fast 1 by xAI, Qwen3 Max Preview by Alibaba, and ERNIE X1.1 by Baidu.
x-AI/Grok-Code-Fast 1Seed 1.6 Flash vs x-AI/Grok-Code-Fast 1Qwen3 Max PreviewSeed 1.6 Flash vs Qwen3 Max PreviewERNIE X1.1Seed 1.6 Flash vs ERNIE X1.1
The highest-ranked open-weight model on Arena Text is Kimi K3 at rank 19. Seed 1.6 Flash itself is closed.
Versions and lineage
Both models have the same 256K token (256,000) context window. They differ in release date: Seed 1.6 Flash was released August 28, 2025, and Seed 1.6 was released October 15, 2025.
Licensing and access
No, Seed 1.6 Flash is closed.
Basics
Seed 1.6 Flash was made by ByteDance and released on August 28, 2025.
Generated from Vertical Tabs data, updated November 11, 2026.
Discussion
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