Nous ResearchHermes 4 405B
Hermes 4 405B is a Nous Research open-weights reasoning model, released 30 Jan 2026. It is not yet ranked: 1 independent result so far, and the index needs at least five across two categories. At $1.50 per million tokens blended it is pricier than most ranked models. Output speed of 36 tokens per second puts it in the slowest quarter, with a first token in 0.4 s. It has been measured at 2 reasoning-effort settings; this summary describes the best-scoring one, and the tabs above switch between them.
- Blended price
- $1.50/M
- $1.00 in · $3.00 out
- Output speed
- 36 tok/s
- OpenRouter traffic, 7-day median; not yet measured by Artificial Analysis
- First answer
- 0.41 s
- Context
- 131k
- Full answer
- –
- Cost per run
- –
- Released
- 30 Jan 2026
- Reasoning30
Reasoning-effort configurations
The same model behaves differently depending on how much it is allowed to think. Each row is one setting, scored only on the benchmarks that were run at that setting. “Not stated” collects results from publishers that did not say which setting they used; for a reasoning model that is usually its thinking mode, but we do not assume it. Pick a setting here or at the top of the page to see its price, speed and category scores.
| Effort | Index | Rank | Speed | First answer | Chat reply cost | Categories |
|---|---|---|---|---|---|---|
| no reasoningbest | – | – | 36 tok/s | 0.41 s | $0.0013 | Reasoning 30 |
| thinking | – | – | 36 tok/s | 0.41 s | $0.0013 | Reasoning 52 |
Benchmark results
See all LLM benchmarks. One column per reasoning effort. Rank is among every configuration of every model on that benchmark. Hover a score for the run it came from.
Reasoning
| Benchmark | no reasoning | thinking | Source |
|---|---|---|---|
| Kagi LLM Benchmark | 30.1%#124 | 55.8%#63 | Kagi LLM Benchmark |
Where to run it
Every provider serving this model through OpenRouter, with throughput and first-token latency measured on live traffic over the last 30 minutes and each provider’s own price. Purple marks the best in each column.
| Provider | Speed | First token | Input $/M | Output $/M | Context | Quantisation |
|---|---|---|---|---|---|---|
| Nebius Token Factory | 39 tok/s | 0.38 s | $1.00 | $3.00 | 131k | fp8 |
What a task costs
Estimates from list price, output speed and time to first answer for the best configuration. “With caching” assumes three-quarters of the input is served from the prompt cache at $1.00 per 1M. Reasoning tokens are not modelled.
| Workload | Tokens in / out | Cost | With caching | Time |
|---|---|---|---|---|
| Chat reply | 400 / 300 | $0.0013 | $0.0013 | 8.7 s |
| Summarize a 30-page report | 12,000 / 600 | $0.014 | $0.014 | 17.1 s |
| Code edit | 6,000 / 1,500 | $0.011 | $0.011 | 42.1 s |
| Agentic coding session | 60,000 / 4,000 | $0.072 | $0.072 | 1.9 min |
| Structured extraction | 2,000 / 200 | $0.0026 | $0.0026 | 6.0 s |
More from Nous Research
See also
Questions people ask
- Why does Hermes 4 405B have no BenchLeader Index score?
- The index needs at least five independent results across at least two categories; as of 25 Oct 2026 Hermes 4 405B has 1 that count. Launch-post scores are never used, so it is ranked once independent publishers have measured it.
- How much does Hermes 4 405B cost per 1M tokens?
- As of 25 Oct 2026, Hermes 4 405B costs $1.00 per 1M input tokens and $3.00 per 1M output tokens, $1.50 blended (three input tokens per output token).
- When was Hermes 4 405B released?
- Nous Research released Hermes 4 405B on 30 Jan 2026. BenchLeader has results for it at 2 reasoning-effort settings.
Data as of 25 Oct 2026. Compare these configurations.
Cite as: BenchLeader, “Hermes 4 405B: benchmarks, pricing, speed and rank”, data as of 25 Oct 2026, https://www.benchleader.com/models/hermes-4-405b.