Seed-OSS Base on SWE-bench Verified: score, rank and what it means
Seed-OSS Base scores 60.5 on SWE-bench Verified, placing it #317 of 600 models in the index. The benchmark average is 57.5 and the leader is GPT-5.2 Pro at 81.7.
Score distribution
The chart shows the top 10 models on SWE-bench Verified, with Seed-OSS Base highlighted. Longer bars mean higher scores.
Top 10 leaderboard
| # | Model | Provider | Context | Input / 1M | Avg score |
|---|---|---|---|---|---|
| 1 | GPT-5.2 Pro | OpenAI | 2000000 | $21.32 | 89.6 |
| 2 | Claude Opus 4.5 Pro | Anthropic | 200000 | $20.98 | 89.1 |
| 3 | GPT-5.2 Max | OpenAI | 1000000 | $21.39 | 89.2 |
| 4 | Claude Sonnet 4.5 Max | Anthropic | 1000000 | $19.90 | 87.2 |
| 5 | GPT-5.2 | OpenAI | 2000000 | $19.71 | 88.0 |
| 6 | GPT-5.1 Pro | OpenAI | 200000 | $19.77 | 87.8 |
| 7 | o4 Max | OpenAI | 2000000 | $19.51 | 86.2 |
| 8 | Claude Sonnet 4.5 Reasoning | Anthropic | 400000 | $19.48 | 87.7 |
| 9 | Claude Opus 4.5 Max | Anthropic | 1000000 | $20.90 | 87.8 |
| 10 | Claude Opus 4.5 Reasoning | Anthropic | 2000000 | $20.91 | 88.2 |
What this score means
On SWE-bench Verified, Seed-OSS Base sits at #317 of 600. The leader, GPT-5.2 Pro, scores 81.7, so the gap to the top is 21.2 points. The median model in this index scores 61.0, which puts Seed-OSS Base below the midpoint.
ByteDance models average 59.5 on this benchmark. Seed-OSS Base is 1.0 points above that provider line, so it is a stronger result than the average ByteDance model.
Among open-weight models, the average is 55.5. Seed-OSS Base is 5.0 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 60.5 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 SWE-bench Verified. 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 |
|---|---|---|---|---|
| Claude 3.7 Sonnet Mini | Anthropic | 32768 | $9.74 | 73.0 |
| Firefunction | Fireworks AI | 16384 | $8.16 | 72.3 |
| Gemma 3 Base | Google DeepMind | 65536 | $3.09 | 71.1 |
| Auto Pro | OpenRouter | 8192 | $8.41 | 71.2 |
| Seed-OSS Base | ByteDance | 16384 | $3.14 | 72.2 |
| Firefunction Max | Fireworks AI | 32768 | $9.12 | 73.2 |
| Mixtral Groq Chat | Groq | 8192 | $3.09 | 72.0 |
Other benchmarks for Seed-OSS Base
| Benchmark | Score | Rank | Percentile | Relative |
|---|---|---|---|---|
| MMLU-Pro | 75.8 | 311 | 48th | |
| GPQA Diamond | 68.1 | 311 | 48th | |
| 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 |
FAQ
What score does Seed-OSS Base get on SWE-bench Verified?
Seed-OSS Base scores 60.5 on SWE-bench Verified in this index. The benchmark average is 57.5 and the top score is 81.7.
How does Seed-OSS Base rank on SWE-bench Verified?
It ranks #317 of 600 models, in the 47th percentile. The leader is GPT-5.2 Pro at 81.7.
Is Seed-OSS Base good at SWE-bench Verified?
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 SWE-bench Verified score calculated?
SWE-bench Verified is a coding 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.