Seed-Coder Models by ByteDance
3 models2025Up to 66k ctx
Details
ResearcherByteDance
LicenseMITOSI-approved
Commercial useCommercial use: permitted
Models3
Released2025
Max context66k
Capabilities
Reasoning1 of 3 models
About
Seed-Coder is a family of lightweight open-source code LLMs developed by ByteDance Seed, comprising base, instruct, and reasoning models trained on 6 trillion code-centric tokens using a model-centric data curation approach. Previously known internally as Doubao-Coder. All models are 8B parameters and available under MIT license on Hugging Face.
Current Variants
Use-when guidance is based on each model's tracked capabilities, context window, release date, and replacement status.
3 in view
Seed-Coder 8B BaseCurrent
Use when the workload needs code, 33k context, and 8B parameters.
2025-05code33k context8B parameters
Seed-Coder 8B InstructCurrent
Use when the workload needs code, 33k context, and 8B parameters.
2025-05code33k context8B parameters
Seed-Coder 8B ReasoningCurrent
Use when the workload needs code, 66k context, and 8B parameters.
2025-05code66k context8B parameters
| Model | Use when | Released | Signals | Status |
|---|---|---|---|---|
| Seed-Coder 8B Base | Use when the workload needs code, 33k context, and 8B parameters. | 2025-05 | code33k context8B parameters | Current |
| Seed-Coder 8B Instruct | Use when the workload needs code, 33k context, and 8B parameters. | 2025-05 | code33k context8B parameters | Current |
| Seed-Coder 8B Reasoning | Use when the workload needs code, 66k context, and 8B parameters. | 2025-05 | code66k context8B parameters | Current |
Release Timeline
1 release group2025-05
3 current
Seed-Coder 8B Base
Currentcode33k context8B parameters
Seed-Coder 8B Instruct
Currentcode33k context8B parameters
Seed-Coder 8B Reasoning
Currentcode66k context8B parameters
Specifications(3 models)
| Model | Released | Context | Parameters | Reasoning |
|---|---|---|---|---|
| Seed-Coder 8B Base | 2025-05 | 33k | 8B | No |
| Seed-Coder 8B Instruct | 2025-05 | 33k | 8B | No |
| Seed-Coder 8B Reasoning | 2025-05 | 66k | 8B | Yes |
Frequently Asked Questions
- What is Seed-Coder used for?
- Seed-Coder is used for code, reasoning, and coding. The family description and listed model capabilities point to those workloads as the best fit.
- How does Seed-Coder compare to Seed?
- Seed-Coder by ByteDance is strongest where you need code, while Seed by ByteDance is the closest related family to check for vision and multimodal work. Seed-Coder has 3 listed variants and reaches up to 66k context, while Seed reaches up to 256k context, so compare the specs and pricing tables before choosing a production model.
- Which Seed-Coder model should I use?
- If price is the main constraint, use the pricing table first because Seed-Coder does not have complete provider pricing in the local data. For the most capable/latest local choice, evaluate Seed-Coder 8B Reasoning with 66k context and reasoning.
