Seed Evolving vs LongCat-2.0 vs MiMo-V2.5-Pro-UltraSpeed
Seed Evolving comes out ahead, 50 to 45 and 43 on our weighted score, though LongCat-2.0 is 27% cheaper per token.
- Our pick
ByteDance SeedSeed Evolving
50/100- ECI—
- Price$0.891 / $4.45
- Context256K
Meituan (LongCat)LongCat-2.0
45/100- ECI—
- Price$0.75 / $2.95
- Context1M
XiaomiMiMo-V2.5-Pro-UltraSpeed
43/100- ECI—
- Price$1.30 / $2.61
- Context1.05M
Seed Evolving is our pick
Seed Evolving is the better all-round choice, scoring 50/100 against LongCat-2.0 (45) and MiMo-V2.5-Pro-UltraSpeed (43). It leads on inputs & features. LongCat-2.0 wins 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 priceLongCat-2.0LongCat-2.0 $1.30 · MiMo-V2.5-Pro-UltraSpeed $1.63 · Seed Evolving $1.78 per 1M tokens (3:1 blend)
- Longest contextMiMo-V2.5-Pro-UltraSpeedMiMo-V2.5-Pro-UltraSpeed 1,048,576 · LongCat-2.0 1,000,000 · Seed Evolving 256,000 tokens
- Widest inputsSeed EvolvingSeed Evolving: Text, Images, Video · LongCat-2.0: Text · MiMo-V2.5-Pro-UltraSpeed: Text
- Self-hostingMiMo-V2.5-Pro-UltraSpeedPublishes downloadable weights
| Measure | Weight | Seed Evolving | LongCat-2.0 | MiMo-V2.5-Pro-UltraSpeed |
|---|---|---|---|---|
| Price | 50% | 38 | 44 | 40 |
| Inputs & features | 30% | 80 | 35 | 35 |
| Context window | 20% | 36 | 60 | 61 |
| Overall | 100% | 50/100 | 45/100 | 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 EvolvingByteDance Seed | LongCat-2.0Meituan (LongCat) | MiMo-V2.5-Pro-UltraSpeedXiaomi |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | — | — | — |
| ECI rank | — | — | — |
| Price per million tokens | |||
| Input | $0.891 | $0.75 (best) | $1.30 |
| Output | $4.45 | $2.95 | $2.61 (best) |
| Cached input | $0.178 | $0.015 | $0.011 (best) |
| Blended (3:1) | $1.78 | $1.30 (best) | $1.63 |
| Long-context rate | Same rate | Same rate | Same rate |
| Price source | Official Volcengine Ark API | Official LongCat API | Official Xiaomi API |
| Limits | |||
| Context window | 256,000 tokens | 1,000,000 tokens | 1,048,576 tokens (best) |
| Max output | 256,000 tokens (best) | 131,072 tokens | 131,072 tokens |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | Yes | No | No |
| PDFs | No | No | No |
| Audio | No | No | No |
| Video | Yes | No | No |
| Reasoning | Yesminimal · low · medium · high · xhigh · max | Yes | Yes |
| Tool calling | Yes | Yes | Yes |
| Structured output | Yes | No | No |
| Availability | |||
| Weights | Proprietary | Proprietary | Open |
| API model ID | doubao-seed-evolving | LongCat-2.0 | mimo-v2.5-pro-ultraspeed |
| API providers | 2 | 5 (best) | 1 |
| Released | Jun 23, 2026 | Jun 30, 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 Evolving$17.81
- LongCat-2.0$13.40
- MiMo-V2.5-Pro-UltraSpeed$18.27
Which should you choose?
Which is better: Seed Evolving, LongCat-2.0 or MiMo-V2.5-Pro-UltraSpeed?
Seed Evolving is the better all-round choice, scoring 50/100 against LongCat-2.0 (45) and MiMo-V2.5-Pro-UltraSpeed (43). It leads on inputs & features. LongCat-2.0 wins 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, LongCat-2.0 or MiMo-V2.5-Pro-UltraSpeed?
LongCat-2.0 is cheaper at $0.75 input / $2.95 output per million tokens (official LongCat API price). MiMo-V2.5-Pro-UltraSpeed costs $1.30 input / $2.61 output per million tokens (official Xiaomi API price); Seed Evolving costs $0.891 input / $4.45 output per million tokens (official Volcengine Ark API price). At a typical mix of three input tokens to one output token, that is $1.30 per million tokens for LongCat-2.0 versus $1.63 for MiMo-V2.5-Pro-UltraSpeed (1.3× as much) and $1.78 for Seed Evolving (1.4× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers all three models yet. Seed Evolving has not been scored yet, LongCat-2.0 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 Evolving, LongCat-2.0 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. All three 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 1,000,000 for LongCat-2.0 and 256,000 for Seed Evolving. Maximum output per response: Seed Evolving up to 256,000, LongCat-2.0 up to 131,072, MiMo-V2.5-Pro-UltraSpeed up to 131,072 tokens.
Which can read images, PDFs, audio or video?
Seed Evolving accepts text, images and video; LongCat-2.0 accepts text; MiMo-V2.5-Pro-UltraSpeed accepts text. Seed Evolving 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 Evolving and LongCat-2.0 is proprietary.
Which is newer?
LongCat-2.0 is the newest, released Jun 30, 2026. Seed Evolving came out 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.
