Head-to-head
Doubao Seed 2.1 Pro vs GLM-5.3-Flash
A 1.6-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 1.6 points, and their strengths do not overlap.
Stronger overall: Doubao Seed 2.1 Pro. 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
- GLM-5.3-Flash93.7
Dimension deltas
A on the left, B on the right; 100 max per row
Doubao Seed 2.1 Pro leads 7, GLM-5.3-Flash leads 1.
Spec sheet
Hard specs in one table
| Item | Doubao Seed 2.1 Pro | GLM-5.3-Flash |
|---|---|---|
| Composite | 95.3 | 93.7 |
| Tier | S+ | S |
| Visual perception & grounding | 96WIN | 95 |
| Document parsing & Chinese OCR | 97WIN | 96 |
| Chart & document reasoning | 95WIN | 93 |
| Video & long-horizon reasoning | 95WIN | 90 |
| GUI agents & tool use | 95WIN | 94 |
| Generation & editing | 87WIN | 86 |
| Chinese context & culture | 96WIN | 94 |
| Ecosystem, cost & availability | 97 | 98WIN |
| Output price | ¥13 / M | ¥3 / M |
| Context | 256K | 200K |
| Parameters | Undisclosed (MoE) | Undisclosed (distilled lightweight) |
| Licence | Closed commercial API | Commercial + on-prem licence (Ascend images included) |
| Native multimodal | Yes | Yes |
| Evidence grade | A | B |
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 GLM-5.3-Flash if…
- Domestic-chip projects on a tight budget
- Document batches and receipt extraction
- Lightweight agents and tool orchestration
- You cannot accept its limitation: Video 90 and generation 86: neither long-video QA nor creative generation is its scenario.
Scenario check
Five scenarios, who holds up
| Scenario | Doubao Seed 2.1 Pro | GLM-5.3-Flash | Better |
|---|---|---|---|
| Chinese receipt OCR | 96 | 95 | Doubao Seed 2.1 Pro |
| Chart data extraction | 94 | 92 | Doubao Seed 2.1 Pro |
| 30-min video QA | 95 | 88 | Doubao Seed 2.1 Pro |
| Mobile GUI control | 94 | 93 | Doubao Seed 2.1 Pro |
| Chinese cultural context | 96 | 94 | Doubao Seed 2.1 Pro |
Comparison FAQ
Doubao Seed 2.1 Pro vs GLM-5.3-Flash: which is stronger?
Composite: Doubao Seed 2.1 Pro 95.3, GLM-5.3-Flash 93.7. Doubao Seed 2.1 Pro leads on Visual perception & grounding, Document parsing & Chinese OCR, Chart & document reasoning, Video & long-horizon reasoning, GUI agents & tool use, Generation & editing, Chinese context & culture; GLM-5.3-Flash leads on Ecosystem, cost & availability. The stronger overall is Doubao Seed 2.1 Pro.
How much more expensive is Doubao Seed 2.1 Pro than GLM-5.3-Flash?
Doubao Seed 2.1 Pro is ¥13/1M output tokens; GLM-5.3-Flash is ¥3/1M. On output price, Doubao Seed 2.1 Pro is pricier; real cost also depends on image tokens and input share.
Can GLM-5.3-Flash replace Doubao Seed 2.1 Pro?
It depends on your primary workload. If it sits in GLM-5.3-Flash’s strengths (Domestic-chip projects on a tight budget, Document batches and receipt extraction, Lightweight agents and tool orchestration), 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.