Seed 2.1 Pro vs Muse Glimmer 30B vs MiMo-V2.5-Pro-UltraSpeed
Muse Glimmer 30B comes out ahead, 57 to 50 and 43 on our weighted score, and it is the cheaper option too.
ByteDance SeedSeed 2.1 Pro
50/100- ECI—
- Price$0.891 / $4.45
- Context256K
- Our pick
MetaMuse Glimmer 30B
57/100- ECI—
- Price$0.30 / $1.20
- Context131K
XiaomiMiMo-V2.5-Pro-UltraSpeed
43/100- ECI—
- Price$1.30 / $2.61
- Context1.05M
Muse Glimmer 30B is our pick
Muse Glimmer 30B is the better all-round choice, scoring 57/100 against Seed 2.1 Pro (50) and MiMo-V2.5-Pro-UltraSpeed (43). It leads on price. Seed 2.1 Pro wins on 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 priceMuse Glimmer 30BMuse Glimmer 30B $0.525 · MiMo-V2.5-Pro-UltraSpeed $1.63 · Seed 2.1 Pro $1.78 per 1M tokens (3:1 blend)
- Longest contextMiMo-V2.5-Pro-UltraSpeedMiMo-V2.5-Pro-UltraSpeed 1,048,576 · Seed 2.1 Pro 256,000 · Muse Glimmer 30B 131,072 tokens
- Widest inputsSeed 2.1 ProSeed 2.1 Pro: Text, Images, Video · Muse Glimmer 30B: Text, Images · MiMo-V2.5-Pro-UltraSpeed: Text
- Self-hostingMuse Glimmer 30B and MiMo-V2.5-Pro-UltraSpeedPublishes downloadable weights (Apache 2.0)
| Measure | Weight | Seed 2.1 Pro | Muse Glimmer 30B | MiMo-V2.5-Pro-UltraSpeed |
|---|---|---|---|---|
| Price | 50% | 38 | 63 | 40 |
| Inputs & features | 30% | 80 | 70 | 35 |
| Context window | 20% | 36 | 24 | 61 |
| Overall | 100% | 50/100 | 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 ProByteDance Seed | Muse Glimmer 30BMeta | MiMo-V2.5-Pro-UltraSpeedXiaomi |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | — | — | — |
| ECI rank | — | — | — |
| Price per million tokens | |||
| Input | $0.891 | $0.30 (best) | $1.30 |
| Output | $4.45 | $1.20 (best) | $2.61 |
| Cached input | $0.178 | — | $0.011 (best) |
| Blended (3:1) | $1.78 | $0.525 (best) | $1.63 |
| Long-context rate | Same rate | Same rate | Same rate |
| Price source | Official Volcengine Ark API | Median of 10 providers | Official Xiaomi API |
| Limits | |||
| Context window | 256,000 tokens | 131,072 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 | Yes | 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 | Yes | No |
| Availability | |||
| Weights | Proprietary | OpenApache 2.0 | Open |
| API model ID | doubao-seed-2-1-pro-260628 | — | mimo-v2.5-pro-ultraspeed |
| API providers | 2 | 12 (best) | 1 |
| Released | Jun 23, 2026 | Aug 10, 2026 | Jun 8, 2026 |
| Knowledge cutoff | — | Jan 4, 2026 | 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 Pro$17.81
- Muse Glimmer 30B$5.40
- MiMo-V2.5-Pro-UltraSpeed$18.27
Which should you choose?
Which is better: Seed 2.1 Pro, Muse Glimmer 30B or MiMo-V2.5-Pro-UltraSpeed?
Muse Glimmer 30B is the better all-round choice, scoring 57/100 against Seed 2.1 Pro (50) and MiMo-V2.5-Pro-UltraSpeed (43). It leads on price. Seed 2.1 Pro wins on 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 Pro, Muse Glimmer 30B or MiMo-V2.5-Pro-UltraSpeed?
Muse Glimmer 30B is cheaper at $0.30 input / $1.20 output per million tokens (median across 10 API providers). MiMo-V2.5-Pro-UltraSpeed costs $1.30 input / $2.61 output per million tokens (official Xiaomi API price); Seed 2.1 Pro 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 $0.525 per million tokens for Muse Glimmer 30B versus $1.63 for MiMo-V2.5-Pro-UltraSpeed (3.1× as much) and $1.78 for Seed 2.1 Pro (3.4× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers all three models yet. Seed 2.1 Pro has not been scored yet, Muse Glimmer 30B 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 Pro, Muse Glimmer 30B 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 256,000 for Seed 2.1 Pro and 131,072 for Muse Glimmer 30B. Maximum output per response: Seed 2.1 Pro up to 256,000, Muse Glimmer 30B up to 131,072, MiMo-V2.5-Pro-UltraSpeed up to 131,072 tokens.
Which can read images, PDFs, audio or video?
Seed 2.1 Pro accepts text, images and video; Muse Glimmer 30B accepts text and images; MiMo-V2.5-Pro-UltraSpeed accepts text. Seed 2.1 Pro handles the widest range of inputs.
Are any of these open source?
Muse Glimmer 30B and MiMo-V2.5-Pro-UltraSpeed publishes its weights (Apache 2.0) and can be self-hosted; Seed 2.1 Pro is proprietary.
Which is newer?
Muse Glimmer 30B is the newest, released Aug 10, 2026. Seed 2.1 Pro came out Jun 23, 2026; MiMo-V2.5-Pro-UltraSpeed came out Jun 8, 2026. Knowledge cutoff: Muse Glimmer 30B Jan 4, 2026, 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.
