Solar Pro 4 vs LongCat-2.0
Too close to call on our weighted score (Solar Pro 4 53, LongCat-2.0 53). The right pick depends on what you value most.
UpstageSolar Pro 4
53/100- ECI—
- Price$0.30 / $1.20
- Context524K
Meituan (LongCat)LongCat-2.0
53/100- ECI—
- Price$0.30 / $1.20
- Context1M
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Make it a three-way comparison.
Too close to call
It is close. Our weighted score puts them within a point (Solar Pro 4 53/100, LongCat-2.0 53/100), so choose by what matters most for your work: Solar Pro 4 on price and LongCat-2.0 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 priceSame priceSolar Pro 4 $0.525 · LongCat-2.0 $0.525 per 1M tokens (3:1 blend)
- Longest contextLongCat-2.0LongCat-2.0 1,000,000 · Solar Pro 4 524,288 tokens
- Widest inputsSame inputsSolar Pro 4: Text · LongCat-2.0: Text
- Self-hostingLongCat-2.0Publishes downloadable weights
| Measure | Weight | Solar Pro 4 | LongCat-2.0 |
|---|---|---|---|
| Price | 50% | 60 | 60 |
| Inputs & features | 30% | 45 | 35 |
| Context window | 20% | 49 | 60 |
| Overall | 100% | 53/100 | 53/100 |
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 | LongCat-2.0Meituan (LongCat) |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | — |
| ECI rank | — | — |
| Price per million tokens | ||
| Input | $0.30 | $0.30 |
| Output | $1.20 | $1.20 |
| Cached input | $0.06 | $0.006 (best) |
| Blended (3:1) | $0.525 | $0.525 |
| Long-context rate | Same rate | Same rate |
| Price source | Official Upstage API | Official LongCat API |
| Limits | ||
| Context window | 524,288 tokens | 1,000,000 tokens (best) |
| Max output | 131,072 tokens | 131,072 tokens |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | No | No |
| PDFs | No | No |
| Audio | No | No |
| Video | No | No |
| Reasoning | Yesminimal · low · medium · high · xhigh · max | Yes |
| Tool calling | Yes | Yes |
| Structured output | Yes | No |
| Availability | ||
| Weights | Proprietary | Open |
| API model ID | solar-pro4 | LongCat-2.0 |
| API providers | 6 | 7 (best) |
| Released | Aug 6, 2026 | Jun 30, 2026 |
| Knowledge cutoff | 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.
- Solar Pro 4$5.40
- LongCat-2.0$5.40
Which should you choose?
Which is better: Solar Pro 4 or LongCat-2.0?
It is close. Our weighted score puts them within a point (Solar Pro 4 53/100, LongCat-2.0 53/100), so choose by what matters most for your work: Solar Pro 4 on price and LongCat-2.0 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 or LongCat-2.0?
Solar Pro 4 and LongCat-2.0 cost the same: $0.30 input / $1.20 output per million tokens.
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. Solar Pro 4 has not been scored yet and LongCat-2.0 has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Solar Pro 4 and LongCat-2.0 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?
LongCat-2.0 has the largest context window at 1,000,000 tokens, against 524,288 for Solar Pro 4. Maximum output per response: Solar Pro 4 up to 131,072, LongCat-2.0 up to 131,072 tokens.
Which can read images, PDFs, audio or video?
Solar Pro 4 accepts text; LongCat-2.0 accepts text. They handle the same number of input types.
Are any of these open source?
LongCat-2.0 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. LongCat-2.0 came out Jun 30, 2026. Knowledge cutoff: 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 Nov 2, 2026.
