Mistral Small 4 vs Solar Pro 3 vs Hy3 preview
Mistral Small 4 comes out ahead, 64 to 56 and 55 on our weighted score.
- Our pick
Mistral AIMistral Small 4
64/100- ECI—
- Price$0.15 / $0.60
- Context256K
Upstage
Solar Pro 3
55/100- ECI—
- Price$0.25 / $0.25
- Context131K
TencentHy3 preview
56/100- ECI—
- Price$0.176 / $0.586
- Context256K
Mistral Small 4 is our pick
Mistral Small 4 is the better all-round choice, scoring 64/100 against Hy3 preview (56) and Solar Pro 3 (55). It leads on inputs & features. 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 3Solar Pro 3 $0.25 · Mistral Small 4 $0.263 · Hy3 preview $0.279 per 1M tokens (3:1 blend)
- Longest contextMistral Small 4 and Hy3 previewMistral Small 4 256,000 · Hy3 preview 256,000 · Solar Pro 3 131,072 tokens
- Widest inputsMistral Small 4Mistral Small 4: Text, Images · Solar Pro 3: Text · Hy3 preview: Text
- Self-hostingMistral Small 4 and Hy3 previewPublishes downloadable weights
| Measure | Weight | Mistral Small 4 | Solar Pro 3 | Hy3 preview |
|---|---|---|---|---|
| Price | 50% | 77 | 78 | 76 |
| Inputs & features | 30% | 60 | 35 | 35 |
| Context window | 20% | 36 | 24 | 36 |
| Overall | 100% | 64/100 | 55/100 | 56/100 |
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 | Mistral Small 4Mistral AI | Solar Pro 3Upstage | Hy3 previewTencent |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | — | — | — |
| ECI rank | — | — | — |
| Price per million tokens | |||
| Input | $0.15 (best) | $0.25 | $0.176 |
| Output | $0.60 | $0.25 (best) | $0.586 |
| Cached input | $0.015 | — | — |
| Blended (3:1) | $0.263 | $0.25 (best) | $0.279 |
| Long-context rate | Same rate | Same rate | Same rate |
| Price source | Official Mistral API | Official Upstage API | Median of 4 providers |
| Limits | |||
| Context window | 256,000 tokens (best) | 131,072 tokens | 256,000 tokens (best) |
| Max output | 256,000 tokens (best) | 8,192 tokens | 64,000 tokens |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | Yes | No | No |
| PDFs | No | No | No |
| Audio | No | No | No |
| Video | No | No | No |
| Reasoning | Yeshigh | Yeslow · medium · high | Yeslow · medium · high |
| Tool calling | Yes | Yes | Yes |
| Structured output | No | No | No |
| Availability | |||
| Weights | Open | Proprietary | Open |
| API model ID | mistral-small-2603 | solar-pro3 | hy3-preview |
| API providers | 16 (best) | 2 | 5 |
| Released | Mar 16, 2026 | Jan 2026 | Apr 20, 2026 |
| Knowledge cutoff | Jun 2025 | Mar 2025 | — |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Mistral Small 4$2.70
- Solar Pro 3$3.00
- Hy3 preview$2.93
Which should you choose?
Which is better: Mistral Small 4, Solar Pro 3 or Hy3 preview?
Mistral Small 4 is the better all-round choice, scoring 64/100 against Hy3 preview (56) and Solar Pro 3 (55). It leads on inputs & features. 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, Mistral Small 4, Solar Pro 3 or Hy3 preview?
Solar Pro 3 is cheaper at $0.25 input / $0.25 output per million tokens (official Upstage API price). Mistral Small 4 costs $0.15 input / $0.60 output per million tokens (official Mistral API price); Hy3 preview costs $0.176 input / $0.586 output per million tokens (median across 4 API providers; free on Tencent TokenHub). At a typical mix of three input tokens to one output token, that is $0.25 per million tokens for Solar Pro 3 versus $0.263 for Mistral Small 4 (1.1× as much) and $0.279 for Hy3 preview (1.1× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers all three models yet. Mistral Small 4 has not been scored yet, Solar Pro 3 has not been scored yet and Hy3 preview has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Mistral Small 4, Solar Pro 3 and Hy3 preview 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?
Mistral Small 4 and Hy3 preview have the largest context windows (256,000 and 256,000 tokens), against 131,072 for Solar Pro 3. Maximum output per response: Mistral Small 4 up to 256,000, Solar Pro 3 up to 8,192, Hy3 preview up to 64,000 tokens.
Which can read images, PDFs, audio or video?
Mistral Small 4 accepts text and images; Solar Pro 3 accepts text; Hy3 preview accepts text. Mistral Small 4 handles the widest range of inputs.
Are any of these open source?
Mistral Small 4 and Hy3 preview publishes its weights and can be self-hosted; Solar Pro 3 is proprietary.
Which is newer?
Hy3 preview is the newest, released Apr 20, 2026. Mistral Small 4 came out Mar 16, 2026; Solar Pro 3 came out Jan 2026. Knowledge cutoff: Mistral Small 4 Jun 2025, Solar Pro 3 Mar 2025.
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.
