Solar Pro 4 vs Seed 2.1 Pro vs Muse Glimmer 30B
Too close to call on our weighted score (Muse Glimmer 30B 57, Solar Pro 4 55, Seed 2.1 Pro 50). The right pick depends on what you value most.
Upstage
Solar Pro 4
55/100- ECI—
- Price$0.30 / $1.20
- Context524K
ByteDance SeedSeed 2.1 Pro
50/100- ECI—
- Price$0.891 / $4.45
- Context256K
MetaMuse Glimmer 30B
57/100- ECI—
- Price$0.30 / $1.20
- Context131K
Too close to call
It is close. Our weighted score puts them within 3 points (Muse Glimmer 30B 57/100, Solar Pro 4 55/100, Seed 2.1 Pro 50/100), so choose by what matters most for your work: Solar Pro 4 on price and Solar Pro 4 for long inputs. 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 priceSolar Pro 4 and Muse Glimmer 30BSolar Pro 4 $0.525 · Muse Glimmer 30B $0.525 · Seed 2.1 Pro $1.78 per 1M tokens (3:1 blend)
- Longest contextSolar Pro 4Solar Pro 4 524,288 · Seed 2.1 Pro 256,000 · Muse Glimmer 30B 131,072 tokens
- Widest inputsSeed 2.1 ProSolar Pro 4: Text · Seed 2.1 Pro: Text, Images, Video · Muse Glimmer 30B: Text, Images
- Self-hostingMuse Glimmer 30BPublishes downloadable weights (Apache 2.0)
| Measure | Weight | Solar Pro 4 | Seed 2.1 Pro | Muse Glimmer 30B |
|---|---|---|---|---|
| Price | 50% | 63 | 38 | 63 |
| Inputs & features | 30% | 45 | 80 | 70 |
| Context window | 20% | 49 | 36 | 24 |
| Overall | 100% | 55/100 | 50/100 | 57/100 |
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 | Solar Pro 4Upstage | Seed 2.1 ProByteDance Seed | Muse Glimmer 30BMeta |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | — | — | — |
| ECI rank | — | — | — |
| Price per million tokens | |||
| Input | $0.30 (best) | $0.891 | $0.30 (best) |
| Output | $1.20 (best) | $4.45 | $1.20 (best) |
| Cached input | $0.06 (best) | $0.178 | — |
| Blended (3:1) | $0.525 (best) | $1.78 | $0.525 (best) |
| Long-context rate | Same rate | Same rate | Same rate |
| Price source | Official Upstage API | Official Volcengine Ark API | Median of 10 providers |
| Limits | |||
| Context window | 524,288 tokens (best) | 256,000 tokens | 131,072 tokens |
| Max output | 131,072 tokens | 256,000 tokens (best) | 131,072 tokens |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | No | Yes | Yes |
| PDFs | No | No | No |
| Audio | No | No | No |
| Video | No | Yes | No |
| Reasoning | Yesminimal · low · medium · high · xhigh · max | Yesminimal · low · medium · high · xhigh · max | Yes |
| Tool calling | Yes | Yes | Yes |
| Structured output | Yes | Yes | Yes |
| Availability | |||
| Weights | Proprietary | Proprietary | OpenApache 2.0 |
| API model ID | solar-pro4 | doubao-seed-2-1-pro-260628 | — |
| API providers | 3 | 2 | 12 (best) |
| Released | Aug 6, 2026 | Jun 23, 2026 | Aug 10, 2026 |
| Knowledge cutoff | Feb 2026 | — | Jan 4, 2026 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Solar Pro 4$5.40
- Seed 2.1 Pro$17.81
- Muse Glimmer 30B$5.40
Which should you choose?
Which is better: Solar Pro 4, Seed 2.1 Pro or Muse Glimmer 30B?
It is close. Our weighted score puts them within 3 points (Muse Glimmer 30B 57/100, Solar Pro 4 55/100, Seed 2.1 Pro 50/100), so choose by what matters most for your work: Solar Pro 4 on price and Solar Pro 4 for long inputs. 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, Solar Pro 4, Seed 2.1 Pro or Muse Glimmer 30B?
Solar Pro 4 is cheaper at $0.30 input / $1.20 output per million tokens (official Upstage API price). Muse Glimmer 30B costs $0.30 input / $1.20 output per million tokens (median across 10 API providers); 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 Solar Pro 4 versus $0.525 for Muse Glimmer 30B (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. Solar Pro 4 has not been scored yet, Seed 2.1 Pro has not been scored yet and Muse Glimmer 30B has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Solar Pro 4, Seed 2.1 Pro and Muse Glimmer 30B 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?
Solar Pro 4 has the largest context window at 524,288 tokens, against 256,000 for Seed 2.1 Pro and 131,072 for Muse Glimmer 30B. Maximum output per response: Solar Pro 4 up to 131,072, Seed 2.1 Pro up to 256,000, Muse Glimmer 30B up to 131,072 tokens.
Which can read images, PDFs, audio or video?
Solar Pro 4 accepts text; Seed 2.1 Pro accepts text, images and video; Muse Glimmer 30B accepts text and images. Seed 2.1 Pro handles the widest range of inputs.
Are any of these open source?
Muse Glimmer 30B publishes its weights (Apache 2.0) and can be self-hosted; Solar Pro 4 and Seed 2.1 Pro is proprietary.
Which is newer?
Muse Glimmer 30B is the newest, released Aug 10, 2026. Solar Pro 4 came out Aug 6, 2026; Seed 2.1 Pro came out Jun 23, 2026. Knowledge cutoff: Solar Pro 4 Feb 2026, Muse Glimmer 30B Jan 4, 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.
