Hermes 4 405B vs solar-mini
solar-mini comes out ahead, 50 to 35 on our weighted score, and it is the cheaper option too.
Nous ResearchHermes 4 405B
35/100- ECI—
- Price$1.00 / $3.00
- Context131K
- Our pick
Upstagesolar-mini
50/100- ECI—
- Price$0.15 / $0.15
- Context33K
Add a model
Make it a three-way comparison.
solar-mini is our pick
solar-mini is the better all-round choice, scoring 50/100 against Hermes 4 405B (35). It leads on price. Hermes 4 405B wins on inputs & features and context window. 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-minisolar-mini $0.15 · Hermes 4 405B $1.50 per 1M tokens (3:1 blend)
- Longest contextHermes 4 405BHermes 4 405B 131,072 · solar-mini 32,768 tokens
- Widest inputsSame inputsHermes 4 405B: Text · solar-mini: Text
- Self-hostingHermes 4 405BPublishes downloadable weights
| Measure | Weight | Hermes 4 405B | solar-mini |
|---|---|---|---|
| Price | 50% | 40 | 85 |
| Inputs & features | 30% | 35 | 25 |
| Context window | 20% | 25 | 0 |
| Overall | 100% | 35/100 | 50/100 |
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 | Hermes 4 405BNous Research | solar-miniUpstage |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | — |
| ECI rank | — | — |
| Price per million tokens | ||
| Input | $1.00 | $0.15 (best) |
| Output | $3.00 | $0.15 (best) |
| Cached input | — | — |
| Blended (3:1) | $1.50 | $0.15 (best) |
| Long-context rate | Same rate | Same rate |
| Price source | Median of 5 providers | Official Upstage API |
| Limits | ||
| Context window | 131,072 tokens (best) | 32,768 tokens |
| Max output | 117,964 tokens (best) | 4,096 tokens |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | No | No |
| PDFs | No | No |
| Audio | No | No |
| Video | No | No |
| Reasoning | Yes | No |
| Tool calling | Yes | Yes |
| Structured output | No | No |
| Availability | ||
| Weights | Open | Proprietary |
| API model ID | — | solar-mini |
| API providers | 5 (best) | 1 |
| Released | Aug 26, 2025 | Jun 12, 2024 |
| Knowledge cutoff | Aug 31, 2024 | Sep 2024 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Hermes 4 405B$16.00
- solar-mini$1.80
Which should you choose?
Which is better: Hermes 4 405B or solar-mini?
solar-mini is the better all-round choice, scoring 50/100 against Hermes 4 405B (35). It leads on price. Hermes 4 405B wins on inputs & features and context window. 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, Hermes 4 405B or solar-mini?
solar-mini is cheaper at $0.15 input / $0.15 output per million tokens (official Upstage API price). Hermes 4 405B costs $1.00 input / $3.00 output per million tokens (median across 5 API providers). At a typical mix of three input tokens to one output token, that is $0.15 per million tokens for solar-mini versus $1.50 for Hermes 4 405B (10× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. Hermes 4 405B has not been scored yet and solar-mini has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Hermes 4 405B and solar-mini 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?
Hermes 4 405B has the largest context window at 131,072 tokens, against 32,768 for solar-mini. Maximum output per response: Hermes 4 405B up to 117,964, solar-mini up to 4,096 tokens.
Which can read images, PDFs, audio or video?
Hermes 4 405B accepts text; solar-mini accepts text. They handle the same number of input types.
Are any of these open source?
Hermes 4 405B publishes its weights and can be self-hosted; solar-mini is proprietary.
Which is newer?
Hermes 4 405B is the newest, released Aug 26, 2025. solar-mini came out Jun 12, 2024. Knowledge cutoff: Hermes 4 405B Aug 31, 2024, solar-mini Sep 2024.
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.
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