# GPT-6 Sol vs Hermes 4 405B

> GPT-6 Sol has enough public results to be ranked (#46); Hermes 4 405B does not yet, so treat this comparison as directional.

- Canonical page: https://noometry.com/compare/gpt-6-sol-vs-hermes-4-405b
- Last updated: 2026-10-10
- Shared benchmarks: 1

## Summary

- They share 1 benchmark with published results for both. GPT-6 Sol scores higher in 2 categories and Hermes 4 405B in 0 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-6 Sol leads 49.3 to 25.3.
- Hermes 4 405B is cheaper at $1 / $3 per million input/output tokens, against $2 / $10 for GPT-6 Sol.
- GPT-6 Sol accepts more context: 1.05M tokens versus 131K.
- Hermes 4 405B has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-6 Sol | Hermes 4 405B |
|---|---|---|
| Provider | OpenAI | Nous Research |
| Noometry Index | 49.2 | 37.1 |
| Rank | 46 | — |
| Context | 1.05M | 131K |
| Input $/M | $2 | $1 |
| Output $/M | $10 | $3 |
| Weights | Proprietary | Open |

## Coding

- GPT-6 Sol: 59.6 (#11)
- Hermes 4 405B: —

| Benchmark | GPT-6 Sol | Hermes 4 405B |
|---|---|---|
| DeepSWE | 68.8% | — |
| FrontierCode | 49.3% | — |
| LMArena WebDev | 1692 | — |
| LMArena Coding | 1453 | — |

## Agentic & Tool Use

- GPT-6 Sol: 33.5 (#49)
- Hermes 4 405B: —

| Benchmark | GPT-6 Sol | Hermes 4 405B |
|---|---|---|
| GDP.pdf | 28% | — |

## Reasoning

- GPT-6 Sol: 49.3 (#34)
- Hermes 4 405B: 25.3

| Benchmark | GPT-6 Sol | Hermes 4 405B |
|---|---|---|
| Kagi LLM Benchmark | — | 55.8% |
| NYT Connections (extended) | 90.1% | — |
| EBR-Bench | 53.3% | — |
| LMArena Hard Prompts | 1420 | — |

## Math

- GPT-6 Sol: 35.8 (#135)
- Hermes 4 405B: —

| Benchmark | GPT-6 Sol | Hermes 4 405B |
|---|---|---|
| LMArena Math | 1404 | — |

## Knowledge

- GPT-6 Sol: 43.0 (#87)
- Hermes 4 405B: —

| Benchmark | GPT-6 Sol | Hermes 4 405B |
|---|---|---|
| Vectara Hallucination Rate | 6.5% | — |
| LMArena Expert | 1449 | — |

## Multimodal

- GPT-6 Sol: 47.6 (#9)
- Hermes 4 405B: —

| Benchmark | GPT-6 Sol | Hermes 4 405B |
|---|---|---|
| Furniture Assembly | 58.3% | — |

## Multilingual

- GPT-6 Sol: 51.0 (#113)
- Hermes 4 405B: —

| Benchmark | GPT-6 Sol | Hermes 4 405B |
|---|---|---|
| LMArena Non-English | 1389 | — |
| LMArena Chinese | 1416 | — |
| LMArena Russian | 1407 | — |
| LMArena Spanish | 1377 | — |

## Instruction Following

- GPT-6 Sol: 74.4 (#97)
- Hermes 4 405B: —

| Benchmark | GPT-6 Sol | Hermes 4 405B |
|---|---|---|
| LMArena Instruction Following | 1406 | — |

## Long Context

- GPT-6 Sol: 43.2 (#100)
- Hermes 4 405B: —

| Benchmark | GPT-6 Sol | Hermes 4 405B |
|---|---|---|
| LMArena Longer Query | 1415 | — |

## Writing & Preference

- GPT-6 Sol: 72.3 (#15)
- Hermes 4 405B: 53.0

| Benchmark | GPT-6 Sol | Hermes 4 405B |
|---|---|---|
| EQ-Bench Creative Writing | 2125 | 1421 |
| LMArena Text | 1396 | — |
| LMArena Creative Writing | 1392 | — |
| LMArena Multi-Turn | 1405 | — |

## FAQ

### Is GPT-6 Sol better than Hermes 4 405B?

GPT-6 Sol has enough public results to be ranked (#46); Hermes 4 405B does not yet, so treat this comparison as directional.

### Which is cheaper, GPT-6 Sol or Hermes 4 405B?

Hermes 4 405B is cheaper. It lists at $1 per million input tokens and $3 per million output tokens; GPT-6 Sol lists at $2 and $10.

### Which has the bigger context window?

GPT-6 Sol does, with 1.05M tokens against 131K.

### How many benchmarks do GPT-6 Sol and Hermes 4 405B share?

1 benchmark has published results for both models. GPT-6 Sol has 22 scored results on Noometry and Hermes 4 405B has 2.