All ByteDance Seed models
B

Seed 1.6 Flash

ByteDance Seed · released December 2025

Seed 1.6 Flash is a ByteDance Seed model with a 262K token context window — about 370 pages of text. It reads Images, Text, and Video and replies in Text. It can show its reasoning before it answers.

$0.086

input / 1M tokens

$0.345

output / 1M tokens

262K

context — about 370 pages

0.07¢

a client proposal

Pricing

Input
$0.086 per million tokens
Output
$0.345 per million tokens
Long-context rate (over 128K)
$0.115 in · $0.920 out, per million tokens

Billed from your Alyph wallet. Prices can change when the provider changes theirs — last checked August 9, 2026.

The numbers

Provider
ByteDance Seed
Released
December 2025 (2025-12-23)
Context window
262K tokens — about 370 pages
Max output
33K tokens per reply
Input
Images, Text, and Video
Output
Text
Reasoning
Shows its thinking before answering

Cost vs Token Amount

Drag the slider to adjust the split between input and output workload.

80% Input20% Output
free$0.14$0.280 tokens250k500k750k1000k
Seed 1.6 Flash

Adjust the ratio slider to change how output tokens influence the final price for equivalent workloads.

What a task costs

2K tokens in · 500 tokens out.

Seed 1.6 Flash

ByteDance Seed

0.03¢

for this task

50% input · 50% output

Full pricing →

Your $5 welcome credit covers about 14,492 of these.

Compare Seed 1.6 Flash

Closest in price on a typical task:

Seed 1.6 Flash vs gpt-oss-safeguard-20b →Seed 1.6 Flash vs GLM 4.7 Flash →Seed 1.6 Flash vs Qwen3.5-9B →Seed 1.6 Flash vs Gemma 4 26B A4B →Any other combination →

Questions, answered

How much does Seed 1.6 Flash cost on Alyph?

Seed 1.6 Flash costs $0.086 per million input tokens and $0.345 per million output tokens on Alyph. A typical task — 5K tokens in, 800 out — works out to about 0.07¢. Billed from your Alyph wallet, with hard spending limits. Prices can change when the provider changes theirs; this page was last checked on August 9, 2026.

What is Seed 1.6 Flash's context window?

262K tokens — about 370 pages. Replies can be up to 33K tokens long. Prompts longer than 128K tokens are billed at the long-context rate.

Can Seed 1.6 Flash read images and files?

Seed 1.6 Flash reads Images, Text, and Video. Drop a file onto the canvas and it becomes part of the context — the only limit is the context window.

Does Seed 1.6 Flash show its reasoning?

Yes. Seed 1.6 Flash can expose its thinking before the final answer, so you can watch how it got there.

Test Seed 1.6 Flash against gpt-oss-safeguard-20b

One prompt, both models at the same time, the better answer wins. Free to start, with $5 of credit.

Sign up free Try the demo