Hermes 4

Independent lab flagship. We card the 405B. AA title is “Hermes 4 - Llama-3.1 405B (Non-reasoning)”; Intelligence Index 9. No official DeepSWE or vals card. Hub base_model is Meta-Llama-3.1-405B.

01

Identity

131,072Context in
Not published on OpenRouterContext out
2025-08-26 (OpenRouter created 1756235463)Released
OpenWeights
Canonical name
Hermes 4
Aliases
hermes-4, nousresearch/hermes-4-405b, Hermes 4 405B
Continuum hosted id
Not listed as a Continuum hosted id
OpenRouter slug
nousresearch/hermes-4-405b
Hugging Face
NousResearch/Hermes-4-405B
Modalities
text
Open weights Not on Continuum host list Independent lab

Independent lab, not a frontier closed API. Llama 3 license on HF. 131k context. OpenRouter catalog created unix 1756235463 (26 Aug 2025). Max output unpublished on that catalog row.

HF config.json (fetched 19 Aug 2026): LlamaForCausalLM, 126 layers, hidden 16384, 128 attention heads, 131,072 positions. Hub base_model is meta-llama/Meta-Llama-3.1-405B.

02

Should I use this for coding agents

Use Hermes 4 when you want Nous’s open 405B. AA Intelligence Index 9 is the Non-reasoning tile. No official DeepSWE or vals card.

DeepSWE

No official DeepSWE mini-swe-agent row for this identity on the public board we fetched.

omitted, not invented as of 2026-08-13 source
Artificial Analysispublished integer
9
bench
Artificial Analysis
version
Intelligence Index
harness
published integer
metric
Intelligence Index
value
9
independent as of 2026-08-19 source
Vals Index

We did not open a vals.ai card for this identity. Chip omitted.

omitted, not invented as of 2026-08-19 source

vals.ai /models/nousresearch_hermes-4-405b returned 404 on 19 Aug 2026. Chip omitted.

Ranked view: Best coding models: the independent leaderboard puts this row and every other card that carries an independent coding score on one board, with the confidence intervals left visible.

Named benches, printed only

Copied from AA or vals HTML we opened. 0.0% placeholder bars are omitted. Do not average these into the hero tiles, and do not invent CI, $/task, or steps for Artificial Analysis.

BenchPrintedNoteSourceURLAs of
AA list pair $1.00 / $3.00 per 1M Printed AA pricing sentence on the Non-reasoning tile. Matches OpenRouter. Artificial Analysis Hermes 4 405B source 2026-08-19
AA throughput 28.1 tok/s Printed Speed row. Not a coding score. Artificial Analysis Hermes 4 405B source 2026-08-19
03

When not to use it

Trust this before you buy

  • No official DeepSWE or vals row (vals 404). AA Intelligence Index 9 is not a SWE percent, and AA’s own title is the Non-reasoning tile. Do not treat 9 as a thinking-mode result.
  • 131k context is smaller than the 1M peers. Llama 3 Community License is not MIT. No official GGUF on this 191-shard repo.
  • base_model is Meta-Llama-3.1-405B: a fine-tune of that checkpoint, not a new 405B trained from scratch by Nous.

Plus is $25/mo with $25 weekly hosted usage. The Mac app stays free with your own keys. Get Plus is not Download for Mac.

04

Artifact and Hugging Face downloads

Artifact

SPDX / license
Llama 3 Community License (HF card: llama3)
Total params
HF safetensors.total: 405,853,388,800 stored tensors
Architecture
LlamaForCausalLM · 126 layers · hidden 16384 · 128 heads · 131,072 positions · base_model Meta-Llama-3.1-405B
Native precision
HF tensors BF16
Files
191 safetensor shards (model-00001-of-00191 …)
Repo size
HF API usedStorage 811,724,126,627 bytes (756 GiB)
HF created
2025-08-06T02:51:17Z
Chat template
Jinja present (chat_template.jinja).
Paper
arXiv:2508.18255 (HF tag on this repo)
Official HF repo
NousResearch/Hermes-4-405B
HF downloads
736
HF likes
94

Community quants: Community quants are community.

Official weights

This is the model repo, not Download for Mac. Downloads and likes from the Hugging Face API on 2026-08-19.

Hub file tree

Safetensor shards
191
Shard bytes
811,706,916,800 bytes
Other file bytes
17,370,716 bytes
Tree file count
200
Hub usedStorage
811,724,126,627 bytes

usedStorage and the sum of .safetensors sizes can differ (LFS pointers, non-shard files, duplicate copies). Cited separately. Source: recursive tree API, 2026-08-19.

PathBytes
model-00001-of-00191.safetensors4,806,672,880
model-00002-of-00191.safetensors4,026,532,224
model-00003-of-00191.safetensors4,630,578,112
model-00004-of-00191.safetensors4,630,578,112
model-00005-of-00191.safetensors3,489,661,192
model-00006-of-00191.safetensors4,630,578,112
model-00007-of-00191.safetensors4,630,578,112
model-00008-of-00191.safetensors3,489,661,192
model-00009-of-00191.safetensors4,630,578,112
model-00010-of-00191.safetensors4,630,578,112
model-00011-of-00191.safetensors3,489,661,192
model-00012-of-00191.safetensors4,630,578,112

Showing the first 12 of 191 safetensor shards. The tree also holds 9 non-shard files, none of them listed here. The snapshot was capped at 12 shards when the tree API was read on 2026-08-19, so the remaining 179 are on the Files tab, not on this page. Totals above are the full tree API sum, not this slice. Byte sizes are Hub tree API size fields, never invented.

05

Continuum serving

Not listed as a Continuum hosted id. OpenRouter nousresearch/hermes-4-405b.

Continuum hosted id not on the host list

We list first-party and OpenRouter, plus Continuum only when the live public allowlist named the id. This is not a 15-host routing table.

06

Economics

OpenRouter catalog 19 Aug 2026: $1 / $3 per million, 131,072 in, max out unpublished, created 1756235463. No cache fields. No DeepSWE $/task.

Artificial Analysis page title is “Hermes 4 - Llama-3.1 405B (Non-reasoning)”. That page prints $1.00 / $3.00 and 28.1 tok/s. Cite the title; do not invent a reasoning-mode Index.

Price this model Opens the pricing calculator preloaded with Hermes 4.

Artificial Analysis title is “Hermes 4 - Llama-3.1 405B (Non-reasoning)”. Intelligence Index 9, fetched 19 Aug 2026. Same page prints $1.00 / $3.00 and 28.1 tok/s. The AA tile is the published integer 9. AA did not print a DeepSWE-style CI, step count, or Index-eval cost we will copy onto the chip.

07

Provenance

ClaimSourceAs of
OR catalog $1 / $3, 131,072 in, max out unpublished, created 1756235463, hugging_face_id NousResearch/Hermes-4-405BOpenRouter catalog2026-08-19
HF safetensors.total 405,853,388,800; usedStorage 811,724,126,627; 191 shards; likes 94; downloads 736; created 2025-08-06T02:51:17Z; arXiv:2508.18255; Llama 3 license; base_model Meta-Llama-3.1-405BHugging Face API NousResearch/Hermes-4-405B2026-08-19
AA title Non-reasoning; Index 9; $1.00 / $3.00; 28.1 tok/sArtificial Analysis Hermes 4 405B2026-08-19
vals 404vals.ai Hermes 42026-08-19
OpenRouter id nousresearch/hermes-4-405b, context 131,072OpenRouter /api/v1/models2026-08-19
HF downloads 736Hugging Face API NousResearch/Hermes-4-405B2026-08-19
191 safetensor shards; shard bytes 811,706,916,800; tree files 200Hugging Face tree API NousResearch/Hermes-4-405B2026-08-19
Spaces API returned 13; official collection Hermes 4 Collection (4 items, 119 upvotes)Hugging Face Spaces / collections API2026-08-19
08

Compare, FAQ, and Get Plus

No other card in this cluster shares a published DeepSWE official row we can put next to this one. We will not compare on vendor-blog numbers.

Continue through Nous Research's model family with Hermes 4 70B.

FAQ

Why no DeepSWE chip?

The official DeepSWE board updated 13 Aug 2026 did not list Hermes 4 405B. Omitting is the rule.

Is AA 9 a thinking result?

No. AA’s own title is the Non-reasoning tile. We cite that title next to the integer.

Why does the lab blog disagree with DeepSWE or Scale?

Lab posts pick a harness, an effort, a split, and sometimes a private eval set. DeepSWE publishes the official mini-swe-agent row with cost, tokens, and steps. Scale SWE-bench Pro only counts when the public shared-harness board has a row we can fetch. A higher lab number is usually a different test, not a better one.

OpenAI-compatible call

No Continuum hosted id is verified for this model, so this page does not invent a curl target. Use the first-party API or the OpenRouter slug nousresearch/hermes-4-405b.

Plus is $25/mo with $25 weekly hosted usage. The Mac app stays free with your own keys. Get Plus is not Download for Mac.