Seed 2.1 Pro
Seed 2.1 ProByteDanceProprietaryReasoningReleased Jun 24, 2026
Overall score
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Not enough evidence to rank yet
Context window
256K
256,000 tokens
Price per 1M tokens
— in · — out
No price listed
Blended price
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3:1 input:output tokens
Output speed
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Not measured yet
Benchmark results (10)
As reported in system cards, papers and public evaluations. Position compares this model with every other model reporting the same benchmark.
Multimodal
| MMMU-Pro | 81.6 | #5 of 48 |
| CharXiv | 85.4 | #15 of 42 |
| MathVision | 92.6 | #3 of 20 |
| ERQA | 72.0 | #3 of 16 |
| ZeroBench | 18.0 | #8 of 8 |
| BabyVision | 73.7 | #4 of 8 |
| Video-MME | 89.2 | #1 of 2 |
Agentic & tool use
| Terminal-Bench 2.1 | 71.0 | #39 of 68 |
Coding
| NL2Repo | 47.0 | #16 of 31 |
Knowledge
| SuperGPQA | 70.8 | #7 of 20 |
Pricing by source
USD per 1M tokens.
| Source | Input | Output | Cached in |
|---|---|---|---|
| List price | — | — | — |
Volcengine publishes first-party CNY pricing for doubao-seed-2.1-pro only: ¥6 input, ¥30 output, and ¥1.2 cache-hit per million tokens (about $0.83 / $4.14 at mid-2026 rates). BenchLM leaves the USD fields unavailable because it does not convert a non-USD first-party price.
Arena ratings
Human-preference ratings from LMArena. Best-rated variant shown.
| WebDev (coding)(Preview) | 1520 | #55 · 15.1K votes |
Speed
Measured by us through OpenRouter (median of trials).
Not available on OpenRouter, so we cannot measure it yet.