Jamba Mini vs Solar Pro 4
Too close to call on our weighted score (Jamba Mini 57, Solar Pro 4 55). The right pick depends on what you value most.
AI21 LabsJamba Mini
57/100- ECI—
- Price$0.20 / $0.40
- Context256K
Upstage
Solar Pro 4
55/100- ECI—
- Price$0.30 / $1.20
- Context524K
Add a model
Make it a three-way comparison.
Too close to call
It is close. Our weighted score puts them within 2 points (Jamba Mini 57/100, Solar Pro 4 55/100), so choose by what matters most for your work: Jamba Mini 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 priceJamba MiniJamba Mini $0.25 · Solar Pro 4 $0.525 per 1M tokens (3:1 blend)
- Longest contextSolar Pro 4Solar Pro 4 524,288 · Jamba Mini 256,000 tokens
- Widest inputsSame inputsJamba Mini: Text · Solar Pro 4: Text
- Self-hostingJamba MiniPublishes downloadable weights
| Measure | Weight | Jamba Mini | Solar Pro 4 |
|---|---|---|---|
| Price | 50% | 78 | 63 |
| Inputs & features | 30% | 35 | 45 |
| Context window | 20% | 36 | 49 |
| Overall | 100% | 57/100 | 55/100 |
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 | Jamba MiniAI21 Labs | Solar Pro 4Upstage |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | — |
| ECI rank | — | — |
| Price per million tokens | ||
| Input | $0.20 (best) | $0.30 |
| Output | $0.40 (best) | $1.20 |
| Cached input | — | $0.06 |
| Blended (3:1) | $0.25 (best) | $0.525 |
| Long-context rate | Same rate | Same rate |
| Price source | Official AI21 Labs API | Official Upstage API |
| Limits | ||
| Context window | 256,000 tokens | 524,288 tokens (best) |
| Max output | 4,096 tokens | 131,072 tokens (best) |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | No | No |
| PDFs | No | No |
| Audio | No | No |
| Video | No | No |
| Reasoning | No | Yesminimal · low · medium · high · xhigh · max |
| Tool calling | Yes | Yes |
| Structured output | Yes | Yes |
| Availability | ||
| Weights | Open | Proprietary |
| API model ID | jamba-mini | solar-pro4 |
| API providers | 1 | 3 (best) |
| Released | Jan 1, 2026 | Aug 6, 2026 |
| Knowledge cutoff | Aug 22, 2024 | Feb 2026 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Jamba Mini$2.80
- Solar Pro 4$5.40
Which should you choose?
Which is better: Jamba Mini or Solar Pro 4?
It is close. Our weighted score puts them within 2 points (Jamba Mini 57/100, Solar Pro 4 55/100), so choose by what matters most for your work: Jamba Mini 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, Jamba Mini or Solar Pro 4?
Jamba Mini is cheaper at $0.20 input / $0.40 output per million tokens (official AI21 Labs API price). Solar Pro 4 costs $0.30 input / $1.20 output per million tokens (official Upstage API price). At a typical mix of three input tokens to one output token, that is $0.25 per million tokens for Jamba Mini versus $0.525 for Solar Pro 4 (2.1× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. Jamba Mini has not been scored yet and Solar Pro 4 has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Jamba Mini and Solar Pro 4 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?
Solar Pro 4 has the largest context window at 524,288 tokens, against 256,000 for Jamba Mini. Maximum output per response: Jamba Mini up to 4,096, Solar Pro 4 up to 131,072 tokens.
Which can read images, PDFs, audio or video?
Jamba Mini accepts text; Solar Pro 4 accepts text. They handle the same number of input types.
Are any of these open source?
Jamba Mini publishes its weights and can be self-hosted; Solar Pro 4 is proprietary.
Which is newer?
Solar Pro 4 is the newest, released Aug 6, 2026. Jamba Mini came out Jan 1, 2026. Knowledge cutoff: Jamba Mini Aug 22, 2024, Solar Pro 4 Feb 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.
