Seed Evolving vs Seed 2.1 Pro
Too close to call on our weighted score (Seed Evolving 50, Seed 2.1 Pro 50). The right pick depends on what you value most.
ByteDance SeedSeed Evolving
50/100- ECI—
- Price$0.891 / $4.45
- Context256K
- ByteDance Seed
Seed 2.1 Pro
50/100- ECI—
- Price$0.891 / $4.45
- Context256K
Add a model
Make it a three-way comparison.
Too close to call
It is close. Our weighted score puts them within a point (Seed Evolving 50/100, Seed 2.1 Pro 50/100), so choose by what matters most for your work: Seed Evolving on price. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
- CapabilityNot enough dataNo independent benchmark covers every model here yet
- Lowest priceSame priceSeed Evolving $1.78 · Seed 2.1 Pro $1.78 per 1M tokens (3:1 blend)
- Longest contextAbout the sameSeed Evolving 256,000 · Seed 2.1 Pro 256,000 tokens
- Widest inputsSame inputsSeed Evolving: Text, Images, Video · Seed 2.1 Pro: Text, Images, Video
- Self-hostingNo open weightsBoth are available only through APIs
| Measure | Weight | Seed Evolving | Seed 2.1 Pro |
|---|---|---|---|
| Price | 50% | 38 | 38 |
| Inputs & features | 30% | 80 | 80 |
| Context window | 20% | 36 | 36 |
| Overall | 100% | 50/100 | 50/100 |
Left out because at least one model lacks the data: capability. The remaining weights were rescaled.
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | Seed EvolvingByteDance Seed | Seed 2.1 ProByteDance Seed |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | — |
| ECI rank | — | — |
| Price per million tokens | ||
| Input | $0.891 | $0.891 |
| Output | $4.45 | $4.45 |
| Cached input | $0.178 | $0.178 |
| Blended (3:1) | $1.78 | $1.78 |
| Long-context rate | Same rate | Same rate |
| Price source | Official Volcengine Ark API | Official Volcengine Ark API |
| Limits | ||
| Context window | 256,000 tokens | 256,000 tokens |
| Max output | 256,000 tokens | 256,000 tokens |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | Yes | Yes |
| PDFs | No | No |
| Audio | No | No |
| Video | Yes | Yes |
| Reasoning | Yesminimal · low · medium · high · xhigh · max | Yesminimal · low · medium · high · xhigh · max |
| Tool calling | Yes | Yes |
| Structured output | Yes | Yes |
| Availability | ||
| Weights | Proprietary | Proprietary |
| API model ID | doubao-seed-evolving | doubao-seed-2-1-pro-260628 |
| API providers | 2 | 2 |
| Released | Jun 23, 2026 | Jun 23, 2026 |
| Knowledge cutoff | — | — |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Seed Evolving$17.81
- Seed 2.1 Pro$17.81
Which should you choose?
Which is better: Seed Evolving or Seed 2.1 Pro?
It is close. Our weighted score puts them within a point (Seed Evolving 50/100, Seed 2.1 Pro 50/100), so choose by what matters most for your work: Seed Evolving on price. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
Which is cheaper, Seed Evolving or Seed 2.1 Pro?
Seed Evolving and Seed 2.1 Pro cost the same: $0.891 input / $4.45 output per million tokens.
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. Seed Evolving has not been scored yet and Seed 2.1 Pro has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Seed Evolving and Seed 2.1 Pro yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Both support tool calling for agent workflows.
Which has the bigger context window?
Seed Evolving and Seed 2.1 Pro share the same 256,000-token context window. Maximum output per response: Seed Evolving up to 256,000, Seed 2.1 Pro up to 256,000 tokens.
Which can read images, PDFs, audio or video?
Seed Evolving accepts text, images and video; Seed 2.1 Pro accepts text, images and video. They handle the same number of input types.
Are any of these open source?
No. Seed Evolving and Seed 2.1 Pro are proprietary and only available through APIs and apps.
Which is newer?
Seed Evolving is the newest, released Jun 23, 2026. Seed 2.1 Pro came out Jun 23, 2026.
How do you decide the winner?
Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Oct 4, 2026.
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