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Hermes 3 405B vs Muse Spark Open

Muse Spark Open leads the LLM Stats Score 45.3 to 3.9. Hermes 3 405B is 2.0x cheaper per token.

Nous Research · Meta · Updated for 2026

Which is better?

Muse Spark Open leads the overall LLM Stats Score 45.3 to 3.9, ranking #42 overall.

On price, Hermes 3 405B is roughly 2.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Muse Spark Open also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Hermes 3 405B

  • cost matters — it's about 2.0x cheaper per token

Choose Muse Spark Open

  • overall performance matters — it scores 45.3 and ranks #42 on LLM Stats
  • your work emphasizes reasoning — it leads those capability indexes
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Oct 2026

At a glance

The differences that matter most.

Hermes 3 405B
Nous Research
Muse Spark Open
Meta
Core performance indexes
LLM Stats Score
3.9
#327
45.3
#42
Reasoning
3.3
#324
45.7
#35
Cost, coverage & limits
Benchmark wins
—
—
Input price
$1.00 / M
$1.25 / M
Output price
$1.00 / M
$4.25 / M
Context window
131,072
1,048,576

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Hermes 3 405B
Muse Spark Open
Math
6.7#281
33.3#58
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

13 reported for Hermes 3 405B · 17 for Muse Spark Open

No common benchmarks found

Hermes 3 405B and Muse Spark Opendon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Hermes 3 405B costs less

For input processing, Hermes 3 405B ($1.00/1M tokens) is 1.3x cheaper than Muse Spark Open ($1.25/1M tokens).

For output processing, Hermes 3 405B ($1.00/1M tokens) is 4.3x cheaper than Muse Spark Open ($4.25/1M tokens).

In conclusion, Muse Spark Open is more expensive than Hermes 3 405B.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Sun Oct 25 2026 • llm-stats.com
Nous Research
Hermes 3 405B
Input tokens$1.00
Output tokens$1.00
Best providerDeepinfra
Meta
Muse Spark Open
Input tokens$1.25
Output tokens$4.25
Best providerTogether
Notice missing or incorrect data?

Model Size

Parameter count comparison

411.0B diff

Muse Spark Open has 411.0B more parameters than Hermes 3 405B, making it 101.5% larger.

Nous Research
Hermes 3 405B
405.0Bparameters
Meta
Muse Spark Open
816.0Bparameters
405.0B
Hermes 3 405B
816.0B
Muse Spark Open

Context Window

Maximum input and output token capacity

Muse Spark Open accepts 1,048,576 input tokens compared to Hermes 3 405B's 131,072 tokens. Muse Spark Open can generate longer responses up to 1,048,576 tokens, while Hermes 3 405B is limited to 131,072 tokens.

Nous Research
Hermes 3 405B
Input131,072 tokens
Output131,072 tokens
Meta
Muse Spark Open
Input1,048,576 tokens
Output1,048,576 tokens
Sun Oct 25 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Muse Spark Open supports multimodal inputs, whereas Hermes 3 405B does not.

Muse Spark Open can handle both text and other forms of data like images, making it suitable for multimodal applications.

Hermes 3 405B

Text
Images
Audio
Video

Muse Spark Open

Text
Images
Audio
Video

License

Usage and distribution terms

Hermes 3 405B is licensed under Apache 2.0, while Muse Spark Open uses Muse Model License.

License differences may affect how you can use these models in commercial or open-source projects.

Hermes 3 405B

Apache 2.0

Open weights

Muse Spark Open

Muse Model License

Open weights

Release Timeline

When each model was launched

Hermes 3 405B was released on 2024-10-09, while Muse Spark Open was released on 2026-10-15.

Muse Spark Open is 25 months newer than Hermes 3 405B.

Hermes 3 405B

Oct 9, 2024

2.0 years ago

Muse Spark Open

Oct 15, 2026

1 weeks ago

2.0yr newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

Hermes 3 405B is available from DeepInfra. Muse Spark Open is available from Together.

Hermes 3 405B

deepinfra logo
Deepinfra
Input Price:Input: $1.00/1MOutput Price:Output: $1.00/1M

Muse Spark Open

together logo
Together
Input Price:Input: $1.25/1MOutput Price:Output: $4.25/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Hermes 3 405B and Muse Spark Open side-by-side, then vote on the output you prefer.

Hermes 3 405B
✓ Preferred
Muse Spark Open
Open in Playground

FAQ

Common questions about Hermes 3 405B vs Muse Spark Open.

Which is better, Hermes 3 405B or Muse Spark Open?

Muse Spark Open leads the LLM Stats Score 45.3 to 3.9. Hermes 3 405B is made by Nous Research and Muse Spark Open is made by Meta. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Hermes 3 405B compare to Muse Spark Open in benchmarks?

Hermes 3 405B scores HellaSwag: 90.2%, MT-Bench: 89.3%, BoolQ: 88.9%, Winogrande: 86.3%, ARC-E: 86.2%. Muse Spark Open scores MCP Atlas: 89.2%, GPQA: 89.0%, OSWorld-Verified: 80.4%, BabyVision: 80.2%, Terminal-Bench 2.1: 76.4%.

Is Hermes 3 405B cheaper than Muse Spark Open?

Hermes 3 405B is 1.3x cheaper for input tokens. Hermes 3 405B costs $1.00/M input and $1.00/M output via deepinfra. Muse Spark Open costs $1.25/M input and $4.25/M output via together.

What are the context window sizes for Hermes 3 405B and Muse Spark Open?

Hermes 3 405B supports 131K tokens and Muse Spark Open supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Hermes 3 405B and Muse Spark Open?

Key differences include LLM Stats Score (3.9 vs 45.3), context window (131K vs 1.0M), input pricing ($1.00 vs $1.25/M), multimodal support (no vs yes), licensing (Apache 2.0 vs Muse Model License). See the full comparison above for benchmark-by-benchmark results.

Who makes Hermes 3 405B and Muse Spark Open?

Hermes 3 405B is developed by Nous Research and Muse Spark Open is developed by Meta.

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