// head_to_head
Hermes 4 405B vs SpaceXAI: Grok 4.3
Published LiveBench scores across all seven categories, live list pricing, context windows, and the measured cost of a point of capability — for both models, side by side.
Hermes 4 405B and SpaceXAI: Grok 4.3 are priced within ~10% of each other.
Hermes 4 405B does not have a published LiveBench run, so this comparison covers price, context and declared capabilities only. A missing score means "not evaluated", not "worse" — the right way to separate these two is an eval on your own workload.
nousresearch
Hermes 4 405B
- Blended / 1M
- $1.50
- Context
- 131K
- Released
- Aug 26, 2025
- Overall score
- Not evaluated
x-ai
SpaceXAI: Grok 4.3
- Blended / 1M
- $1.56
- Context
- 1M
- Released
- Apr 30, 2026
- Overall score
- 62.2
Specs and pricing
| Metric | Hermes 4 405B | SpaceXAI: Grok 4.3 |
|---|---|---|
| LiveBench overall Mean of the seven LiveBench category scores, 0–100. Higher is better. | — | 62.2 |
| Cost per point Measured benchmark spend divided by overall score — dollars per point of capability. | — | $0.0325 |
| Blended price / 1M 3:1 input:output mix, the usual shape of production traffic. | $1.50 | $1.56 |
| Input price / 1M | $1.00win | $1.25 |
| Output price / 1M | $3.00 | $2.50win |
| Cached input / 1M Price of an input token served from the prompt cache, where the provider publishes one. | — | $0.200 |
| Context window | 131K | 1Mwin |
| Max output tokens | 118K | 900Kwin |
Benchmarks by category
An overall score averages away the thing you probably care about. These are the seven LiveBench categories scored separately — Hermes 4 405B on top, SpaceXAI: Grok 4.3 below, both out of 100.
What each one costs to run
Per-token prices are hard to feel. These are monthly list costs for both models across five workload shapes, using each provider's published cached-input rate where there is one.
| Workload | Hermes 4 405B | SpaceXAI: Grok 4.3 |
|---|---|---|
| Support chatbot 1.2K in / 400 out × 200K requests | $480.00/mo | $424.40/mo |
| RAG assistant 8K in / 600 out × 100K requests | $980.00/mo | $730.00/mo |
| Coding agent 40K in / 4K out × 20K requests | $1,040/mo | $612.00/mo |
| Document extraction 20K in / 1.5K out × 50K requests | $1,225/mo | $1,385/mo |
| Bulk classification 500 in / 20 out × 5M requests | $2,800/mo | $2,850/mo |
Which should you pick?
You need to fit large documents in one call
SpaceXAI: Grok 4.3
Wider context window — 1M against 131K.
Hermes 4 405B vs SpaceXAI: Grok 4.3 FAQ
Which is better, Hermes 4 405B or SpaceXAI: Grok 4.3?
Hermes 4 405B and SpaceXAI: Grok 4.3 are priced within ~10% of each other. Hermes 4 405B does not have a published LiveBench run, so this comparison covers price, context and declared capabilities only. A missing score means "not evaluated", not "worse" — the right way to separate these two is an eval on your own workload.
Is Hermes 4 405B cheaper than SpaceXAI: Grok 4.3?
They cost about the same. Both land near $1.50 per million tokens on a 3:1 input:output blend, so price is unlikely to be the deciding factor between them.
Does Hermes 4 405B or SpaceXAI: Grok 4.3 have a bigger context window?
SpaceXAI: Grok 4.3 has the larger context window: 131K for Hermes 4 405B against 1M for SpaceXAI: Grok 4.3. Note that a window you can fill is not a window you should fill — retrieval quality usually degrades well before the limit, and you pay for every token you put in it.
Do Hermes 4 405B and SpaceXAI: Grok 4.3 support prompt caching?
SpaceXAI: Grok 4.3 publishes a cached-input rate of $0.200 per million tokens against a full input rate of $1.25. The catalogue lists no separate cached rate for Hermes 4 405B, which means the provider does not price it separately here — not that caching is unavailable.
Related comparisons
How these numbers are produced
- Price — provider list price from OpenRouter, refreshed every 15 minutes. “Blended” is a 3:1 input:output mix.
- Scores — LiveBench release 2026-06-25, using their own category map. Each model shows its strongest published run. A blank means “not evaluated”, never “bad”.
- Cost per point — the measured dollars LiveBench spent on the run, divided by the score it earned.
- “Win” — awarded only past a threshold: one full point on a benchmark score, 10% on a price, 25% on a context window. Anything tighter reports as a tie, because effort settings alone move a LiveBench score by more than that.
Published benchmarks rank models on someone else's tasks. Before committing, see LLM & agent evaluation for building an eval on your own.