Last refreshed 2026-06-21. Next refresh: weekly.
Why use Seed 1.8 on Volcengine?
Volcengine offers Seed 1.8 with pay-as-you-go pricing at $0.25/1M input tokens. Volcengine is ByteDance's cloud platform offering comprehensive AI APIs including Doubao LLMs for multimodal generation and inference with Chinese market optimization.
Setup recipe
Docs fallbackUse the provider REST API or SDKCreate a provider API keymodel: seed-1-8-251228seed-1-8-251228Request example
Gotchas
- Use provider model ID "seed-1-8-251228", not the LLMReference slug "seed-1.8".
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $0.25 |
| Output tokens | $2.00 |
Capabilities
About Seed 1.8
Seed 1.8 (Doubao 1.8) is ByteDance Seed's generalized agentic model released December 18, 2025. It supports multimodal text and image input with configurable chain-of-thought thinking modes. Strengths include GUI agent tasks across desktop/web/mobile, BrowseComp-en benchmark (67.6), code generation, and video understanding. Available via Volcengine (BytePlus) API with a 256K context window, max 64K output tokens. GitHub repository is Apache-2.0 licensed but weights are not publicly available.
FAQ
What does Seed 1.8 cost on Volcengine?
On Volcengine, Seed 1.8 costs $0.25 per 1M input tokens and $2.00 per 1M output tokens.
What is the context window for Seed 1.8 on Volcengine?
Seed 1.8 supports a 256k token context window on Volcengine.
What API model ID do I use for Seed 1.8 on Volcengine?
Use the model ID seed-1-8-251228 when calling Volcengine's API.
Who created Seed 1.8?
Seed 1.8 was created by ByteDance as part of the Seed model family.
Is Seed 1.8 open source?
Seed 1.8 is not open source; the seed data lists it as proprietary.