Jamba Large vs Hermes 4 405B
Hermes 4 405B comes out ahead, 35 to 29 on our weighted score, and it is the cheaper option too.
AI21 LabsJamba Large
29/100- ECI—
- Price$2.00 / $8.00
- Context256K
- Our pick
Nous ResearchHermes 4 405B
35/100- ECI—
- Price$1.00 / $3.00
- Context131K
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Make it a three-way comparison.
Hermes 4 405B is our pick
Hermes 4 405B is the better all-round choice, scoring 35/100 against Jamba Large (29). It leads on price. Jamba Large wins on 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 priceHermes 4 405BHermes 4 405B $1.50 · Jamba Large $3.50 per 1M tokens (3:1 blend)
- Longest contextJamba LargeJamba Large 256,000 · Hermes 4 405B 131,072 tokens
- Widest inputsSame inputsJamba Large: Text · Hermes 4 405B: Text
- Self-hostingAll open weightsEvery model here can be downloaded and run on your own hardware
| Measure | Weight | Jamba Large | Hermes 4 405B |
|---|---|---|---|
| Price | 50% | 23 | 40 |
| Inputs & features | 30% | 35 | 35 |
| Context window | 20% | 36 | 25 |
| Overall | 100% | 29/100 | 35/100 |
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 LargeAI21 Labs | Hermes 4 405BNous Research |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | — |
| ECI rank | — | — |
| Price per million tokens | ||
| Input | $2.00 | $1.00 (best) |
| Output | $8.00 | $3.00 (best) |
| Cached input | — | — |
| Blended (3:1) | $3.50 | $1.50 (best) |
| Long-context rate | Same rate | Same rate |
| Price source | Official AI21 Labs API | Median of 5 providers |
| Limits | ||
| Context window | 256,000 tokens (best) | 131,072 tokens |
| Max output | 4,096 tokens | 117,964 tokens (best) |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | No | No |
| PDFs | No | No |
| Audio | No | No |
| Video | No | No |
| Reasoning | No | Yes |
| Tool calling | Yes | Yes |
| Structured output | Yes | No |
| Availability | ||
| Weights | Open | Open |
| API model ID | jamba-large | — |
| API providers | 1 | 5 (best) |
| Released | Jul 3, 2025 | Aug 26, 2025 |
| Knowledge cutoff | Aug 22, 2024 | Aug 31, 2024 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Jamba Large$36.00
- Hermes 4 405B$16.00
Which should you choose?
Which is better: Jamba Large or Hermes 4 405B?
Hermes 4 405B is the better all-round choice, scoring 35/100 against Jamba Large (29). It leads on price. Jamba Large wins on 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, Jamba Large or Hermes 4 405B?
Hermes 4 405B is cheaper at $1.00 input / $3.00 output per million tokens (median across 5 API providers). Jamba Large costs $2.00 input / $8.00 output per million tokens (official AI21 Labs API price). At a typical mix of three input tokens to one output token, that is $1.50 per million tokens for Hermes 4 405B versus $3.50 for Jamba Large (2.3× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. Jamba Large has not been scored yet and Hermes 4 405B has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Jamba Large and Hermes 4 405B 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?
Jamba Large has the largest context window at 256,000 tokens, against 131,072 for Hermes 4 405B. Maximum output per response: Jamba Large up to 4,096, Hermes 4 405B up to 117,964 tokens.
Which can read images, PDFs, audio or video?
Jamba Large accepts text; Hermes 4 405B accepts text. They handle the same number of input types.
Are any of these open source?
Yes, both publish their weights, so you can self-host them.
Which is newer?
Hermes 4 405B is the newest, released Aug 26, 2025. Jamba Large came out Jul 3, 2025. Knowledge cutoff: Jamba Large Aug 22, 2024, Hermes 4 405B Aug 31, 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.
