Seed-OSS Base on IFEval: score, rank and what it means
Seed-OSS Base scores 79.0 on IFEval, placing it #356 of 600 models in the index. The benchmark average is 78.6 and the leader is Claude Opus 4.5 Pro at 96.1.
Score distribution
The chart shows the top 10 models on IFEval, 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 Pro | Anthropic | 200000 | $20.98 | 89.1 |
| 2 | Claude Opus 4.5 Reasoning | Anthropic | 2000000 | $20.91 | 88.2 |
| 3 | GPT-5.2 Pro | OpenAI | 2000000 | $21.32 | 89.6 |
| 4 | GPT-5.2 Max | OpenAI | 1000000 | $21.39 | 89.2 |
| 5 | GPT-5.2 Reasoning | OpenAI | 1000000 | $20.98 | 87.5 |
| 6 | GPT-5.1 Pro | OpenAI | 200000 | $19.77 | 87.8 |
| 7 | Gemini 3 Pro Max | Google DeepMind | 2000000 | $20.57 | 87.9 |
| 8 | GPT-5.1 Reasoning | OpenAI | 400000 | $20.27 | 88.3 |
| 9 | Claude Opus 4.5 Max | Anthropic | 1000000 | $20.90 | 87.8 |
| 10 | o4 Reasoning | OpenAI | 1000000 | $19.69 | 87.5 |
What this score means
On IFEval, Seed-OSS Base sits at #356 of 600. The leader, Claude Opus 4.5 Pro, scores 96.1, so the gap to the top is 17.1 points. The median model in this index scores 81.2, which puts Seed-OSS Base below the midpoint.
ByteDance models average 79.8 on this benchmark. Seed-OSS Base is 0.8 points below that provider line, so it is a weaker result than the average ByteDance model.
Among open-weight models, the average is 77.0. Seed-OSS Base is 2.0 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 79.0 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 IFEval. 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 |
|---|---|---|---|---|
| Phi-3.5 Chat | Microsoft | 16384 | $2.64 | 69.0 |
| Phi-3.5 Instruct | Microsoft | 16384 | $2.67 | 70.1 |
| Arctic | Snowflake | 8192 | $2.72 | 68.8 |
| Llama 3 Hyperbolic Base | Hyperbolic | 32768 | $3.02 | 71.1 |
| Seed-OSS Base | ByteDance | 16384 | $3.14 | 72.2 |
| Arctic Instruct | Snowflake | 65536 | $2.83 | 70.6 |
| ERNIE 4.5 Mini | Baidu | 32768 | $8.62 | 71.0 |
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 | |
| TruthfulQA | 74.0 | 353 | 41th | |
| HellaSwag | 83.7 | 296 | 51th | |
| MMMU | 68.5 | 337 | 44th | |
| Arena Elo | 1360.4 | 343 | 43th |
FAQ
What score does Seed-OSS Base get on IFEval?
Seed-OSS Base scores 79.0 on IFEval in this index. The benchmark average is 78.6 and the top score is 96.1.
How does Seed-OSS Base rank on IFEval?
It ranks #356 of 600 models, in the 41st percentile. The leader is Claude Opus 4.5 Pro at 96.1.
Is Seed-OSS Base good at IFEval?
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 IFEval score calculated?
IFEval is a instruction following 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.