WhichAI / Models / Hermes 4 405B

Hermes 4 405B

Nous · verified October 13, 2026

legacy paid api open-weights local

ProviderNous

Statuslegacy

AA Intelligence Index7.5 (official, read October 13, 2026)

Released2025-08-26

Context window131K

ModalitiesText

API price $/1M (in / out)$1 / $3 (OpenRouter)

Speedn/a

AccessAPI $1/$3 per 1M tokens on OpenRouter · open weights · listed August 26, 2025

In one line

Hermes 4 405B by Nous, measured by Artificial Analysis at 7.5 on the Intelligence Index. Added to WhichAI automatically from live data on October 13, 2026: no editorial review yet, so judge it by the numbers, not by a verdict. OpenRouter's description: “Hermes 4 is a large-scale reasoning model built on Meta-Llama-3.1-405B and released by Nous Research.”

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Artificial Analysis Intelligence Index, official scale (the number published on artificialanalysis.ai), relayed by OpenRouter and refreshed automatically: last read October 13, 2026. 210 models carry a current official measurement. A value marked ~ is converted from an earlier snapshot because no current measurement is published; an unmeasured model is never ranked. Context, price, modality and listing dates come from the public OpenRouter model list (refreshed automatically on the live site; static copy retrieved October 3, 2026) and vendor pages. Missing values are not published or not yet verified - shown as -. Sources are linked inside the app (the Ranking chapter and About > Methodology).