ByteDance Seed
Seed 2.1 Pro
Tool callingStructured outputReasoningImage inputVideo input
Flagship ByteDance Seed 2.1 model for complex multimodal reasoning, coding, and agents
- Context
- 256K
- Released
- 3mo ago
Sources:models.dev
Benchmarks
DeepSWE is the primary coding benchmark where an exact model evaluation exists. Other sourced evaluations appear below; missing scores are not zero.
Not evaluated in DeepSWE 1.1 as of 2026-09-22. Results are only shown for exact model versions in the official dataset. Official leaderboard.
No benchmark results have been matched to this model yet.
Specifications
- Developer
- ByteDance Seed
- Model family
- Seed
- Type
- Language model
- Predecessor
- —
- Successor
- —
- Released
- June 23, 2026
- Model ID
bytedance-seed/seed-2.1-pro- Openness
- Closed
- License
- —
- Input modalities
- text, image, video
- Output modalities
- text
- Modality
- text+image+video->text
- Max output tokens
- 256K
- Hugging Face
- —
- Source freshness
- Metadata synced Oct 8, 2026, 10:17 PM UTC
Additional source evidence
- Source model
- bytedance-seed/seed-2.1-pro
- Source family
- seed
- Last updated
- 2026-06-23
- Model context
- 256K
- Model output limit
- 256K
- Open weights
- No
- File attachments
- Yes
- Reasoning
- Yes
- Tool calling
- Yes
- Structured output
- Yes
- Temperature control
- Yes
Complete source record (JSON)
{
"id": "bytedance-seed/seed-2.1-pro",
"name": "Seed 2.1 Pro",
"description": "Flagship ByteDance Seed 2.1 model for complex multimodal reasoning, coding, and agents",
"family": "seed",
"last_updated": "2026-06-23",
"attachment": true,
"reasoning": true,
"tool_call": true,
"structured_output": true,
"temperature": true,
"modalities": {
"input": [
"text",
"image",
"video"
],
"output": [
"text"
]
},
"limit": {
"context": 256000,
"output": 256000
},
"release_date": "2026-06-23",
"open_weights": false
}Infrastructure
Provider availability
Provider endpoint data will appear after this model's first OpenRouter endpoint sync.