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ByteDance Seed · Released Aug 28, 2025

Seed 1.6 Flash

Low-latency ByteDance Seed model for high-throughput chat, extraction, and lightweight tool use.

  • Proprietary
  • Reasoning
  • Tool calling
  • Vision
Capability
—No ECI score yet
Input
$0.022per 1M tokens
Output
$0.223per 1M tokens
Context
256K32K max output
Pricing

What it costs

Input
$0.022per million tokens
Output
$0.223per million tokens
Cached input
$0.0044per million tokens
Over 32K tokens
$0.045 / $0.445input / output per million
Blended (3:1)
$0.072cheaper than 94% of priced models

Typical monthly bills

Monthly usageEstimated cost
Side project2M input + 0.5M output tokens$0.156
Team assistant25M input + 5M output tokens$1.67
Production app250M input + 50M output tokens$16.70

Official Volcengine Ark API price, as listed on models.dev.

Capability

Independent benchmarks

Epoch AI has not published a Capabilities Index score for Seed 1.6 Flash yet.

Specifications

The details

Lab
ByteDance Seed
Released
Aug 28, 2025
Context window
256,000 tokens
Max output
32,000 tokens
Inputs
Text, Images
Output
Text
Reasoning
Can be switched on or off
Tool calling
Yes
Structured output
Yes
Weights
Proprietary
API model ID
doubao-seed-1-6-flash-250828on Volcengine Ark
Availability
2 API providerslisted on models.dev

Volcengine Ark model documentation

Same lab

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Questions

About Seed 1.6 Flash

How much does Seed 1.6 Flash cost?

Seed 1.6 Flash costs $0.022 input / $0.223 output per million tokens (official Volcengine Ark API price). Cached input is $0.0044 per million tokens. Requests over 32K tokens are billed at $0.045 input / $0.445 output. At a 3:1 input-to-output mix that is $0.072 per million tokens, cheaper than 94% of the 360 priced models we track.

What is the context window of Seed 1.6 Flash?

Seed 1.6 Flash accepts up to 256,000 tokens per request and can write up to 32,000 tokens in one response.

How good is Seed 1.6 Flash?

Epoch AI has not published a Capabilities Index score for Seed 1.6 Flash yet.

Is Seed 1.6 Flash open source?

No. Seed 1.6 Flash is proprietary; you use it through Volcengine Ark’s API or partner platforms.

What inputs does Seed 1.6 Flash support?

Seed 1.6 Flash accepts text and images and replies in text. It is a reasoning model, supports tool calling and can return structured JSON output.

When was Seed 1.6 Flash released?

ByteDance Seed released Seed 1.6 Flash on Aug 28, 2025.

What are the best alternatives to Seed 1.6 Flash?

The closest current models from other labs on capability, price and release date are Sarvam 105B (Sarvam AI, $0.047 / $0.186), Trinity Mini (Arcee AI, $0.045 / $0.15), Apertus 8B (Swiss AI, $0.10 / $0.20) and Granite-4.0-H-Small (IBM, $0.064 / $0.265).