Solar Pro 4 vs Toast 1
Solar Pro 4 comes out ahead, 55 to 47 on our weighted score, though Toast 1 is 23% cheaper per token.
- Our pick
Upstage
Solar Pro 4
55/100- ECI—
- Price$0.30 / $1.20
- Context524K
Mixedbread
Toast 1
47/100- ECI—
- Price$0.30 / $0.72
- Context131K
Add a model
Make it a three-way comparison.
Solar Pro 4 is our pick
Solar Pro 4 is the better all-round choice, scoring 55/100 against Toast 1 (47). It leads on inputs & features and context window. Toast 1 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 priceToast 1Toast 1 $0.405 · Solar Pro 4 $0.525 per 1M tokens (3:1 blend)
- Longest contextSolar Pro 4Solar Pro 4 524,288 · Toast 1 131,000 tokens
- Widest inputsSame inputsSolar Pro 4: Text · Toast 1: Text
- Self-hostingNo open weightsBoth are available only through APIs
| Measure | Weight | Solar Pro 4 | Toast 1 |
|---|---|---|---|
| Price | 50% | 63 | 68 |
| Inputs & features | 30% | 45 | 25 |
| Context window | 20% | 49 | 24 |
| Overall | 100% | 55/100 | 47/100 |
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 | Toast 1Mixedbread |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | — |
| ECI rank | — | — |
| Price per million tokens | ||
| Input | $0.30 | $0.30 |
| Output | $1.20 | $0.72 (best) |
| Cached input | $0.06 | — |
| Blended (3:1) | $0.525 | $0.405 (best) |
| Long-context rate | Same rate | Same rate |
| Price source | Official Upstage API | Median of 1 providers |
| Limits | ||
| Context window | 524,288 tokens (best) | 131,000 tokens |
| Max output | 131,072 tokens (best) | 4,000 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 | No |
| Tool calling | Yes | Yes |
| Structured output | Yes | No |
| Availability | ||
| Weights | Proprietary | Proprietary |
| API model ID | solar-pro4 | — |
| API providers | 3 (best) | 1 |
| Released | Aug 6, 2026 | Aug 13, 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
- Toast 1$4.44
Which should you choose?
Which is better: Solar Pro 4 or Toast 1?
Solar Pro 4 is the better all-round choice, scoring 55/100 against Toast 1 (47). It leads on inputs & features and context window. Toast 1 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, Solar Pro 4 or Toast 1?
Toast 1 is cheaper at $0.30 input / $0.72 output per million tokens (median across 1 API provider). 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 $0.405 per million tokens for Toast 1 versus $0.525 for Solar Pro 4 (1.3× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. Solar Pro 4 has not been scored yet and Toast 1 has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Solar Pro 4 and Toast 1 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 131,000 for Toast 1. Maximum output per response: Solar Pro 4 up to 131,072, Toast 1 up to 4,000 tokens.
Which can read images, PDFs, audio or video?
Solar Pro 4 accepts text; Toast 1 accepts text. They handle the same number of input types.
Are any of these open source?
No. Solar Pro 4 and Toast 1 are proprietary and only available through APIs and apps.
Which is newer?
Toast 1 is the newest, released Aug 13, 2026. Solar Pro 4 came out Aug 6, 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 Oct 4, 2026.
