Seed-OSS Base on Arena Elo: score, rank and what it means
Seed-OSS Base scores 1360.4 on Arena Elo, placing it #343 of 600 models in the index. The benchmark average is 1349.9 and the leader is Claude Opus 4.5 Max at 1501.9.
Score distribution
The chart shows the top 10 models on Arena Elo, with Seed-OSS Base highlighted. Longer bars mean higher scores.
Top 10 leaderboard
| # | Model | Provider | Context | Input / 1M | Avg score |
|---|---|---|---|---|---|
| 1 | Claude Opus 4.5 Max | Anthropic | 1000000 | $20.90 | 87.8 |
| 2 | GPT-5.2 Reasoning | OpenAI | 1000000 | $20.98 | 87.5 |
| 3 | GPT-5.2 Turbo | OpenAI | 1000000 | $20.73 | 87.4 |
| 4 | Claude Opus 4.5 Reasoning | Anthropic | 2000000 | $20.91 | 88.2 |
| 5 | GPT-5.2 Max | OpenAI | 1000000 | $21.39 | 89.2 |
| 6 | Gemini 3 Pro Turbo | Google DeepMind | 400000 | $19.62 | 86.4 |
| 7 | Grok 4 Max | xAI | 2000000 | $19.70 | 86.6 |
| 8 | Claude Opus 4.5 | Anthropic | 400000 | $19.42 | 87.7 |
| 9 | GPT-5.1 Pro | OpenAI | 200000 | $19.77 | 87.8 |
| 10 | Grok 4 Reasoning | xAI | 2000000 | $19.67 | 87.8 |
What this score means
On Arena Elo, Seed-OSS Base sits at #343 of 600. The leader, Claude Opus 4.5 Max, scores 1501.9, so the gap to the top is 141.5 points. The median model in this index scores 1373.8, which puts Seed-OSS Base below the midpoint.
ByteDance models average 1366.2 on this benchmark. Seed-OSS Base is 5.8 points below that provider line, so it is a weaker result than the average ByteDance model.
Among open-weight models, the average is 1338.0. Seed-OSS Base is 22.4 points above that group. This is the more useful comparison if you are shortlisting within the same tier rather than across the whole index.
Read a 1360.4 as a relative signal, not an absolute guarantee. Benchmark scores depend on prompt format, evaluation harness and contamination controls. Use this page to narrow the shortlist, then test the model on your own data.
Price context
At $3.14 per million input tokens, Seed-OSS Base is below the median input price of $4.00 across the 600 models scored on Arena Elo. The models immediately around it in the ranking are shown below so you can compare score and price together.
| Model | Provider | Context | Input / 1M | Avg score |
|---|---|---|---|---|
| ERNIE 4.5 Mini | Baidu | 32768 | $8.62 | 71.0 |
| Firesearch Pro | Fireworks AI | 32768 | $7.67 | 70.4 |
| Firesearch Max | Fireworks AI | 8192 | $7.80 | 69.9 |
| Llama 3 Novita Base | Novita AI | 8192 | $3.06 | 70.3 |
| Seed-OSS Base | ByteDance | 16384 | $3.14 | 72.2 |
| Reka Core Mini | Reka AI | 8192 | $7.48 | 70.1 |
| Fusion Max | OpenRouter | 65536 | $9.14 | 72.5 |
Other benchmarks for Seed-OSS Base
| 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 |
FAQ
What score does Seed-OSS Base get on Arena Elo?
Seed-OSS Base scores 1360.4 on Arena Elo in this index. The benchmark average is 1349.9 and the top score is 1501.9.
How does Seed-OSS Base rank on Arena Elo?
It ranks #343 of 600 models, in the 43rd percentile. The leader is Claude Opus 4.5 Max at 1501.9.
Is Seed-OSS Base good at Arena Elo?
It is below the median for this benchmark, so test it carefully before relying on it for this capability. The result should be read alongside its price and context window.
How is the Arena Elo score calculated?
Arena Elo is a preference benchmark. Scores in this index are modelled estimates on a 0–100 scale (or Elo for Arena), derived from capability tier and benchmark difficulty. They are not official leaderboard results.
What does Seed-OSS Base cost?
Seed-OSS Base costs $3.14 per million input tokens and $11.67 per million output tokens.