Head-to-head
Doubao Seed 2.1 Pro vs Kimi K3
A 0.0-point composite gap — but the real story is the dimension mix. Same weights, unpacked: who leads where, and whether the premium is justified.
#4 / 24
Doubao Seed 2.1 Pro
ByteDance
Seven months on from 2.0: documents and charts filled in
Full dossierThe short answer
The composites differ by 0.0 points, and their strengths do not overlap.
Stronger overall: effectively tied. If you only run one workload, read the dimension table instead.
Overlaid radar
Same weights, same scale; overlap means parity
- Doubao Seed 2.1 Pro95.3
- Kimi K395.3
Dimension deltas
A on the left, B on the right; 100 max per row
Doubao Seed 2.1 Pro leads 3, Kimi K3 leads 4, tied 1.
Spec sheet
Hard specs in one table
| Item | Doubao Seed 2.1 Pro | Kimi K3 |
|---|---|---|
| Composite | 95.3 | 95.3 |
| Tier | S+ | S+ |
| Visual perception & grounding | 96 | 97WIN |
| Document parsing & Chinese OCR | 97 | 97 |
| Chart & document reasoning | 95 | 96WIN |
| Video & long-horizon reasoning | 95WIN | 92 |
| GUI agents & tool use | 95 | 96WIN |
| Generation & editing | 87 | 90WIN |
| Chinese context & culture | 96WIN | 95 |
| Ecosystem, cost & availability | 97WIN | 95 |
| Output price | ¥13 / M | ¥16 / M |
| Context | 256K | 2M |
| Parameters | Undisclosed (MoE) | 2.8T total (MoE, open) |
| Licence | Closed commercial API | Open weights (community license) |
| Native multimodal | Yes | Yes |
| Evidence grade | A | A |
How to choose
Choose Doubao Seed 2.1 Pro if…
- Chinese short-video moderation and tagging
- Long-table and cross-page document batches
- Mobile GUI agents and automation
- You cannot accept its limitation: Generation slips from 88 to 87; do not rely on it for creative design or image editing.
How to choose
Choose Kimi K3 if…
- Engineering manuals and API docs QA
- Paper-figure reproduction and code screenshots
- Very long multimodal knowledge bases
- Complex agent and tool-orchestration flows
- You cannot accept its limitation: Generation 90 — level with Qwen3.8-Max and Qwen3.5 but not the board’s best; creative-design pipelines should look elsewhere.
Scenario check
Five scenarios, who holds up
| Scenario | Doubao Seed 2.1 Pro | Kimi K3 | Better |
|---|---|---|---|
| Chinese receipt OCR | 96 | 90 | Doubao Seed 2.1 Pro |
| Chart data extraction | 94 | 95 | Kimi K3 |
| 30-min video QA | 95 | 88 | Doubao Seed 2.1 Pro |
| Mobile GUI control | 94 | 94 | Tie |
| Chinese cultural context | 96 | 92 | Doubao Seed 2.1 Pro |
Comparison FAQ
Doubao Seed 2.1 Pro vs Kimi K3: which is stronger?
Composite: Doubao Seed 2.1 Pro 95.3, Kimi K3 95.3. Doubao Seed 2.1 Pro leads on Video & long-horizon reasoning, Chinese context & culture, Ecosystem, cost & availability; Kimi K3 leads on Visual perception & grounding, Chart & document reasoning, GUI agents & tool use, Generation & editing. The stronger overall is effectively tied.
How much more expensive is Doubao Seed 2.1 Pro than Kimi K3?
Doubao Seed 2.1 Pro is ¥13/1M output tokens; Kimi K3 is ¥16/1M. On output price, Kimi K3 is pricier; real cost also depends on image tokens and input share.
Can Kimi K3 replace Doubao Seed 2.1 Pro?
It depends on your primary workload. If it sits in Kimi K3’s strengths (Engineering manuals and API docs QA, Paper-figure reproduction and code screenshots, Very long multimodal knowledge bases, Complex agent and tool-orchestration flows), yes. If you need Chinese short-video moderation and tagging, switching will cost quality.
Personal ranking · Not an official score
Every ranking, score and comparison on this page is an independent personal ranking, not an official score, and represents no vendor, institution or regulator. Scores are a subjective mapping of public evidence under our own weights — change the weights and the order changes. Disagree, or spotted a factual error? Contact the site owner: jizhi2024@foxmail.com — we check each report and log corrections in the changelog.