Seed 2.1 Turbo vs MiMo-V2.5-Pro-UltraSpeed
Seed 2.1 Turbo comes out ahead, 57 to 43 on our weighted score, and it is the cheaper option too.
- Our pick
ByteDance SeedSeed 2.1 Turbo
57/100- ECI—
- Price$0.445 / $2.23
- Context256K
XiaomiMiMo-V2.5-Pro-UltraSpeed
43/100- ECI—
- Price$1.30 / $2.61
- Context1.05M
Add a model
Make it a three-way comparison.
Seed 2.1 Turbo is our pick
Seed 2.1 Turbo is the better all-round choice, scoring 57/100 against MiMo-V2.5-Pro-UltraSpeed (43). It leads on price and inputs & features. MiMo-V2.5-Pro-UltraSpeed wins on context window. 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 priceSeed 2.1 TurboSeed 2.1 Turbo $0.891 · MiMo-V2.5-Pro-UltraSpeed $1.63 per 1M tokens (3:1 blend)
- Longest contextMiMo-V2.5-Pro-UltraSpeedMiMo-V2.5-Pro-UltraSpeed 1,048,576 · Seed 2.1 Turbo 256,000 tokens
- Widest inputsSeed 2.1 TurboSeed 2.1 Turbo: Text, Images, Video · MiMo-V2.5-Pro-UltraSpeed: Text
- Self-hostingMiMo-V2.5-Pro-UltraSpeedPublishes downloadable weights
| Measure | Weight | Seed 2.1 Turbo | MiMo-V2.5-Pro-UltraSpeed |
|---|---|---|---|
| Price | 50% | 52 | 40 |
| Inputs & features | 30% | 80 | 35 |
| Context window | 20% | 36 | 61 |
| Overall | 100% | 57/100 | 43/100 |
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 2.1 TurboByteDance Seed | MiMo-V2.5-Pro-UltraSpeedXiaomi |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | — |
| ECI rank | — | — |
| Price per million tokens | ||
| Input | $0.445 (best) | $1.30 |
| Output | $2.23 (best) | $2.61 |
| Cached input | $0.089 | $0.011 (best) |
| Blended (3:1) | $0.891 (best) | $1.63 |
| Long-context rate | Same rate | Same rate |
| Price source | Official Volcengine Ark API | Official Xiaomi API |
| Limits | ||
| Context window | 256,000 tokens | 1,048,576 tokens (best) |
| Max output | 256,000 tokens (best) | 131,072 tokens |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | Yes | No |
| PDFs | No | No |
| Audio | No | No |
| Video | Yes | No |
| Reasoning | Yesminimal · low · medium · high · xhigh · max | Yes |
| Tool calling | Yes | Yes |
| Structured output | Yes | No |
| Availability | ||
| Weights | Proprietary | Open |
| API model ID | doubao-seed-2-1-turbo-260628 | mimo-v2.5-pro-ultraspeed |
| API providers | 4 (best) | 1 |
| Released | Jun 23, 2026 | Jun 8, 2026 |
| Knowledge cutoff | — | Dec 2024 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Seed 2.1 Turbo$8.91
- MiMo-V2.5-Pro-UltraSpeed$18.27
Which should you choose?
Which is better: Seed 2.1 Turbo or MiMo-V2.5-Pro-UltraSpeed?
Seed 2.1 Turbo is the better all-round choice, scoring 57/100 against MiMo-V2.5-Pro-UltraSpeed (43). It leads on price and inputs & features. MiMo-V2.5-Pro-UltraSpeed wins on context window. 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 2.1 Turbo or MiMo-V2.5-Pro-UltraSpeed?
Seed 2.1 Turbo is cheaper at $0.445 input / $2.23 output per million tokens (official Volcengine Ark API price). MiMo-V2.5-Pro-UltraSpeed costs $1.30 input / $2.61 output per million tokens (official Xiaomi API price). At a typical mix of three input tokens to one output token, that is $0.891 per million tokens for Seed 2.1 Turbo versus $1.63 for MiMo-V2.5-Pro-UltraSpeed (1.8× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. Seed 2.1 Turbo has not been scored yet and MiMo-V2.5-Pro-UltraSpeed has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Seed 2.1 Turbo and MiMo-V2.5-Pro-UltraSpeed 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?
MiMo-V2.5-Pro-UltraSpeed has the largest context window at 1,048,576 tokens, against 256,000 for Seed 2.1 Turbo. Maximum output per response: Seed 2.1 Turbo up to 256,000, MiMo-V2.5-Pro-UltraSpeed up to 131,072 tokens.
Which can read images, PDFs, audio or video?
Seed 2.1 Turbo accepts text, images and video; MiMo-V2.5-Pro-UltraSpeed accepts text. Seed 2.1 Turbo handles the widest range of inputs.
Are any of these open source?
MiMo-V2.5-Pro-UltraSpeed publishes its weights and can be self-hosted; Seed 2.1 Turbo is proprietary.
Which is newer?
Seed 2.1 Turbo is the newest, released Jun 23, 2026. MiMo-V2.5-Pro-UltraSpeed came out Jun 8, 2026. Knowledge cutoff: MiMo-V2.5-Pro-UltraSpeed Dec 2024.
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.
Related comparisons
- Add Motif 3Three-way comparison
- Seed 2.1 Turbo vs Motif 3Motif Technologies
- Seed 2.1 Turbo vs Nex-N2-ProNex AGI
- Seed 2.1 Turbo vs LongCat-2.0Meituan (LongCat)
- Seed 2.1 Turbo vs Qwen3.5 27BAlibaba (Qwen)
- MiMo-V2.5-Pro-UltraSpeed vs Seed 2.1 ProByteDance Seed
- MiMo-V2.5-Pro-UltraSpeed vs DeepSeek V4 ProDeepSeek
