// head_to_head
Nano Banana 2 (Gemini 3.1 Flash Image Preview) vs SpaceXAI: Grok Build 0.1
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.
Nano Banana 2 (Gemini 3.1 Flash Image Preview) is the cheaper of the two; neither can be ranked on quality here.
Nano Banana 2 (Gemini 3.1 Flash Image Preview) 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.
Nano Banana 2 (Gemini 3.1 Flash Image Preview)
- Blended / 1M
- $1.13
- Context
- 66K
- Released
- Feb 26, 2026
- Overall score
- Not evaluated
x-ai
SpaceXAI: Grok Build 0.1
- Blended / 1M
- $1.25
- Context
- 256K
- Released
- May 20, 2026
- Overall score
- 67.8
Specs and pricing
| Metric | Nano Banana 2 (Gemini 3.1 Flash Image Preview) | SpaceXAI: Grok Build 0.1 |
|---|---|---|
| LiveBench overall Mean of the seven LiveBench category scores, 0–100. Higher is better. | — | 67.8 |
| Cost per point Measured benchmark spend divided by overall score — dollars per point of capability. | — | $0.0144 |
| Blended price / 1M 3:1 input:output mix, the usual shape of production traffic. | $1.13win | $1.25 |
| Input price / 1M | $0.500win | $1.00 |
| Output price / 1M | $3.00 | $2.00win |
| Cached input / 1M Price of an input token served from the prompt cache, where the provider publishes one. | — | $0.200 |
| Context window | 66K | 256Kwin |
| Max output tokens | 59K | 230Kwin |
Benchmarks by category
An overall score averages away the thing you probably care about. These are the seven LiveBench categories scored separately — Nano Banana 2 (Gemini 3.1 Flash Image Preview) on top, SpaceXAI: Grok Build 0.1 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 | Nano Banana 2 (Gemini 3.1 Flash Image Preview) | SpaceXAI: Grok Build 0.1 |
|---|---|---|
| Support chatbot 1.2K in / 400 out × 200K requests | $360.00/mo | $342.40/mo |
| RAG assistant 8K in / 600 out × 100K requests | $580.00/mo | $600.00/mo |
| Coding agent 40K in / 4K out × 20K requests | $640.00/mo | $512.00/mo |
| Document extraction 20K in / 1.5K out × 50K requests | $725.00/mo | $1,110/mo |
| Bulk classification 500 in / 20 out × 5M requests | $1,550/mo | $2,300/mo |
Which should you pick?
You need to fit large documents in one call
SpaceXAI: Grok Build 0.1
Wider context window — 256K against 66K.
You are cost-constrained
Nano Banana 2 (Gemini 3.1 Flash Image Preview)
Cheaper on blended list price at $1.13 per million tokens.
Nano Banana 2 (Gemini 3.1 Flash Image Preview) vs SpaceXAI: Grok Build 0.1 FAQ
Which is better, Nano Banana 2 (Gemini 3.1 Flash Image Preview) or SpaceXAI: Grok Build 0.1?
Nano Banana 2 (Gemini 3.1 Flash Image Preview) is the cheaper of the two; neither can be ranked on quality here. Nano Banana 2 (Gemini 3.1 Flash Image Preview) 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 Nano Banana 2 (Gemini 3.1 Flash Image Preview) cheaper than SpaceXAI: Grok Build 0.1?
Nano Banana 2 (Gemini 3.1 Flash Image Preview) is cheaper. On a 3:1 input:output blend, Nano Banana 2 (Gemini 3.1 Flash Image Preview) lists at $1.13 per million tokens and SpaceXAI: Grok Build 0.1 at $1.25 — Nano Banana 2 (Gemini 3.1 Flash Image Preview) is 11% cheaper. Input and output are priced separately — Nano Banana 2 (Gemini 3.1 Flash Image Preview) charges $0.500 in and $3.00 out, SpaceXAI: Grok Build 0.1 charges $1.00 and $2.00 — so the model that looks cheaper flips depending on how output-heavy your workload is.
Does Nano Banana 2 (Gemini 3.1 Flash Image Preview) or SpaceXAI: Grok Build 0.1 have a bigger context window?
SpaceXAI: Grok Build 0.1 has the larger context window: 66K for Nano Banana 2 (Gemini 3.1 Flash Image Preview) against 256K for SpaceXAI: Grok Build 0.1. 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 Nano Banana 2 (Gemini 3.1 Flash Image Preview) and SpaceXAI: Grok Build 0.1 support prompt caching?
SpaceXAI: Grok Build 0.1 publishes a cached-input rate of $0.200 per million tokens against a full input rate of $1.00. The catalogue lists no separate cached rate for Nano Banana 2 (Gemini 3.1 Flash Image Preview), 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.