ByteDance Seed: Seed 1.6 Flash
Seed 1.6 Flash is a language model from ByteDance Seed released on Aug 28, 2025. It reads text and images and writes text, with a 262K token context window and up to 33K tokens per reply.
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It costs $0.1032 per million input tokens and $0.4126 per million output tokens.
It supports tool calling and structured JSON output.
4 providers serve it, including Volcengine Ark, Ofox and Kilo Gateway. The lowest input price is $0.0223 per million tokens at Volcengine Ark.
- Modalities
- In / out price
- $0.1032 / $0.4126 per 1M
- Context
- 262K
- Max output
- 33K
- Released
- Aug 28, 2025
- Knowledge cutoff
- n/a
- Tool calling
- Structured output
- Reasoning
- Prompt caching
- Open weights
- Free to use
Seed 1.6 Flash pricing
USD, as listed on Oct 15, 2026. Most bills are input heavy, so the cached input rate matters as much as the headline price.
| Input | $0.1032 / 1M tokens | |
|---|---|---|
| Output | $0.4126 / 1M tokens |
Seed 1.6 Flash providers
4 providers serve it, including Volcengine Ark, Ofox and Kilo Gateway. The lowest input price is $0.0223 per million tokens at Volcengine Ark. Each host sets its own price and limits, so the cheapest one is not always the one with the longest context.
| Provider | Input /M | Output /M | Cache read /M | Context | Max output |
|---|---|---|---|---|---|
| Volcengine Ark | $0.0223 | $0.2227 | $0.0045 | 256K | 32K |
| Ofox | $0.03 | $0.22 | $0.0043 | 256K | 32K |
| Kilo Gateway | $0.075 | $0.30 | – | 262K | 33K |
| AI/ML API | $0.1032 | $0.4126 | – | 262K | 33K |
What Seed 1.6 Flash costs per month
Pick a workload close to yours or type your own volumes.
Supported request parameters
What you can set when you call Seed 1.6 Flash through an OpenAI compatible API.
- Tools
tools - Structured outputs
structured_outputs - Temperature
temperature
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Seed 1.6 Flash questions
How much does the Seed 1.6 Flash API cost?
$0.1032 per million input tokens and $0.4126 per million output tokens. The estimator on this page turns that into a monthly bill for your own workload.
What is the context window of Seed 1.6 Flash?
262,144 tokens of input, and it can write up to 32,768 tokens in one reply. As a rough guide, a million tokens is around 750,000 English words.
Which providers serve Seed 1.6 Flash?
4 providers serve it, including Volcengine Ark, Ofox and Kilo Gateway. The lowest input price is $0.0223 per million tokens at Volcengine Ark. Prices differ by host, so the Providers table on this page lists each one with its input and output price.
Does Seed 1.6 Flash support tool calling?
Yes. It accepts tool definitions and can return JSON that matches a schema, which is what an agent needs to call your APIs.
Is Seed 1.6 Flash open source?
No. ByteDance Seed serves it through an API only, so you cannot download the weights or host it yourself.
When was Seed 1.6 Flash released?
Aug 28, 2025.
Catalog data from models.dev (MIT licensed), refreshed daily, last on Oct 15, 2026. The summary is written from these facts.
Building on Seed 1.6 Flash?
I test your real tasks on it and the two closest alternatives, then ship the agent on whichever wins on cost and accuracy.
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