Seed-OSS Base: pricing, context window and benchmarks
Seed-OSS Base is a open-weight model from ByteDance. It offers a 16,384-token context window, costs $3.14 per million input tokens and $11.67 per million output tokens, and averages 72.2 across the index's benchmark suite.
Pricing
Seed-OSS Base costs $3.14 per million input tokens and $11.67 per million output tokens. A blended 3:1 input-to-output mix works out to about $5.27 per million tokens. Cached input is listed at $0.35 per million tokens.
| Item | Price | Notes |
|---|---|---|
| Input | $3.14 | per 1M tokens |
| Output | $11.67 | per 1M tokens |
| Cached input | $0.35 | per 1M tokens |
| Blended 3:1 | $5.27 | estimate per 1M tokens |
| 1M in + 1M out | $14.81 | estimate |
Benchmarks
Scores below are modelled estimates on a 0–100 scale. Use them to compare relative position, not as official vendor results.
| Benchmark | Score | Rank | Percentile | Relative |
|---|---|---|---|---|
| MMLU-Pro | 75.8 | 311 | 48th | |
| GPQA Diamond | 68.1 | 311 | 48th | |
| SWE-bench Verified | 60.5 | 317 | 47th | |
| HumanEval | 78.1 | 288 | 52th | |
| MATH-500 | 73.4 | 353 | 41th | |
| AIME 2025 | 67.2 | 310 | 48th | |
| LiveCodeBench | 65.5 | 283 | 53th | |
| IFEval | 79.0 | 356 | 41th | |
| TruthfulQA | 74.0 | 353 | 41th | |
| HellaSwag | 83.7 | 296 | 51th | |
| MMMU | 68.5 | 337 | 44th | |
| Arena Elo | 1360.4 | 343 | 43th |
What Seed-OSS Base is good for
Seed-OSS Base is an open-weight model, so it can be self-hosted or run through a third-party inference provider. That matters for data residency, fine-tuning and long-run cost control. At $3.14 per million input tokens (hosted list price) and a 16,384-token context window, it is a practical option for teams that want more control than a closed API allows.
Strengths
- Input price of $3.14 per million tokens is at or below the index median.
- Open weights make self-hosting, fine-tuning and data-residency review possible.
- Accepts more than text, including image input where the provider supports it.
Trade-offs
- Context window of 16,384 tokens is small for long-document work.
- Average benchmark score is below the index median; test it on your own task.
How it compares
| Model | Provider | Context | Input / 1M | Avg score |
|---|---|---|---|---|
| Firefunction | Fireworks AI | 16384 | $8.16 | 72.3 |
| Fusion Pro | OpenRouter | 65536 | $8.69 | 72.2 |
| Fusion Reasoning | OpenRouter | 65536 | $8.59 | 72.2 |
| Llama 3 Modal Base | Modal | 16384 | $3.21 | 72.2 |
| Llama 3.1 Base | Meta AI | 32768 | $3.39 | 72.2 |
| Seed-OSS Base | ByteDance | 16384 | $3.14 | 72.2 |
FAQ
How much does Seed-OSS Base cost?
Seed-OSS Base is listed at $3.14 per million input tokens and $11.67 per million output tokens. Cached input is $0.35 per million tokens. A blended 3:1 input-to-output mix is about $5.27 per million tokens.
What is the context window of Seed-OSS Base?
Seed-OSS Base has a context window of 16,384 tokens and can emit up to 16,384 output tokens per request in this index.
Is Seed-OSS Base open weights?
Yes. Seed-OSS Base is listed as an open-weight model under a open weights licence.
How does Seed-OSS Base score on benchmarks?
Seed-OSS Base averages 72.2 across the scored benchmarks in this index, ranking #325 of 600 models. Its strongest relative result is Arena Elo at 1360.4.
What is Seed-OSS Base best for?
Seed-OSS Base is an open-weight model, so it can be self-hosted or run through a third-party inference provider. That matters for data residency, fine-tuning and long-run cost control. At $3.14 per million input tokens (hosted list price) and a 16,384-token context window, it is a practical option for teams that want more control than a closed API allows.