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Pick two models and see what each costs, how well it works and what it's actually for. The scores are my own judgment on a 1–5 scale from using these — not vendor claims and not benchmark results. Your picks stay in the address bar, so you can send the comparison to someone else.

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First model

Second model

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Chat and everyday writing

Hermes Agent

Hermes

Visit

Free value

5/5

Performance

3/5

Range of uses

3/5

Free and open, rougher than the commercial tools — good for learning agents.

Published benchmark scores: MMLU-Pro82.9%
hard multiple-choice questions across professional subjects · tested: Hermes 4 405B
Benchmark List, citing the Hermes 4 report · 13 August 2025 report · maker's own figures
GPQA Diamond72.7%
graduate-level science questions · tested: Hermes 4 405B
Nous Research technical report · 13 August 2025 · maker's own figures
Artificial Analysis Intelligence Index9
combined score across ten reasoning and knowledge tests · tested: Hermes 4 405B
Artificial Analysis · checked September 2026 · independent
Far below the hosted flagships — this is the price of running it yourself.
The agent itself has never been benchmarked. These are scores for Hermes 4 405B, the model it runs on, and the headline numbers come from Nous Research's own technical report.
Figures copied from the sources above, checked 17 September 2026.
Cost: Free, MIT-licensed and self-hosted; you pay your own model provider.
Performance: An open agent you point at a task rather than a chatbot; capable but rougher around the edges than the commercial assistants.
Use it for: Automating a repeated multi-step task
Learning how agents actually work