// head_to_head
Kimi K3 vs SpaceXAI: Grok 4.7
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.
SpaceXAI: Grok 4.7 wins outright — it scores higher and costs less.
SpaceXAI: Grok 4.7 leads by 5.6 points overall while listing 38% cheaper per blended million tokens. There is no trade-off to reason about here; the only reason to pick the other is a constraint this table does not show, like an existing contract, a region, or a provider you are already on. The two cost measures disagree here, which is worth knowing: SpaceXAI: Grok 4.7 has the lower sticker price, but Kimi K3 earns each point of capability for less — $0.0209 against $0.0291 — because per-token rates do not predict how many tokens a model actually spends on a task.
moonshotai
Kimi K3
- Blended / 1M
- $4.14
- Context
- 1.0M
- Released
- Jul 16, 2026
- Overall score
- 64.6
x-ai
SpaceXAI: Grok 4.7
- Blended / 1M
- $3.00
- Context
- 500K
- Released
- Sep 21, 2026
- Overall score
- 70.1
Specs and pricing
| Metric | Kimi K3 | SpaceXAI: Grok 4.7 |
|---|---|---|
| LiveBench overall Weighted mean of the seven LiveBench category scores, 0–100. Higher is better. | 64.6 | 70.1win |
| Cost per point Measured benchmark spend divided by overall score — dollars per point of capability. | $0.0209win | $0.0291 |
| Blended price / 1M 3:1 input:output mix, the usual shape of production traffic. | $4.14 | $3.00win |
| Input price / 1M | $0.192win | $2.00 |
| Output price / 1M | $16.00 | $6.00win |
| Cached input / 1M Price of an input token served from the prompt cache, where the provider publishes one. | $0.182win | $0.500 |
| Context window | 1.0Mwin | 500K |
| Max output tokens | 944Kwin | 450K |
Benchmarks by category
An overall score averages away the thing you probably care about. These are the seven LiveBench categories scored separately — Kimi K3 on top, SpaceXAI: Grok 4.7 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 | Kimi K3 | SpaceXAI: Grok 4.7 |
|---|---|---|
| Support chatbot 1.2K in / 400 out × 200K requests | $1,325/mo | $852.00/mo |
| RAG assistant 8K in / 600 out × 100K requests | $1,110/mo | $1,360/mo |
| Coding agent 40K in / 4K out × 20K requests | $1,428/mo | $1,240/mo |
| Document extraction 20K in / 1.5K out × 50K requests | $1,392/mo | $2,375/mo |
| Bulk classification 500 in / 20 out × 5M requests | $2,075/mo | $4,850/mo |
Which should you pick?
You are running this at volume
Kimi K3
Lowest measured cost per point of capability at $0.0209 per point — the gap compounds with every request.
Quality matters more than the bill
SpaceXAI: Grok 4.7
Highest overall LiveBench score of the two at 70.1.
The workload is coding or agentic work
SpaceXAI: Grok 4.7
Leads on long-horizon agentic — 46.1 against 26.4.
You need to fit large documents in one call
Kimi K3
Wider context window — 1.0M against 500K.
Kimi K3 vs SpaceXAI: Grok 4.7 FAQ
Which is better, Kimi K3 or SpaceXAI: Grok 4.7?
SpaceXAI: Grok 4.7 wins outright — it scores higher and costs less. SpaceXAI: Grok 4.7 leads by 5.6 points overall while listing 38% cheaper per blended million tokens. There is no trade-off to reason about here; the only reason to pick the other is a constraint this table does not show, like an existing contract, a region, or a provider you are already on. The two cost measures disagree here, which is worth knowing: SpaceXAI: Grok 4.7 has the lower sticker price, but Kimi K3 earns each point of capability for less — $0.0209 against $0.0291 — because per-token rates do not predict how many tokens a model actually spends on a task.
Is Kimi K3 cheaper than SpaceXAI: Grok 4.7?
SpaceXAI: Grok 4.7 is cheaper. On a 3:1 input:output blend, Kimi K3 lists at $4.14 per million tokens and SpaceXAI: Grok 4.7 at $3.00 — SpaceXAI: Grok 4.7 is 38% cheaper. Input and output are priced separately — Kimi K3 charges $0.192 in and $16.00 out, SpaceXAI: Grok 4.7 charges $2.00 and $6.00 — so the model that looks cheaper flips depending on how output-heavy your workload is.
Kimi K3 vs SpaceXAI: Grok 4.7: which scores higher on benchmarks?
Kimi K3 scores 64.6 and SpaceXAI: Grok 4.7 scores 70.1 overall on LiveBench, the weighted mean of its seven categories. That is a 5.6-point lead for SpaceXAI: Grok 4.7. Category scores differ from the overall figure — a model can lead on reasoning and trail on coding, which the per-category table above breaks out.
Which gives better value for money, Kimi K3 or SpaceXAI: Grok 4.7?
Kimi K3. Cost per point divides the measured dollars LiveBench spent running the benchmark by the score it earned, so it captures something token pricing misses: a reasoning model can emit many times more tokens than its per-token rate suggests. Kimi K3 works out at $0.0209 per point and SpaceXAI: Grok 4.7 at $0.0291.
Does Kimi K3 or SpaceXAI: Grok 4.7 have a bigger context window?
Kimi K3 has the larger context window: 1.0M for Kimi K3 against 500K for SpaceXAI: Grok 4.7. 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 Kimi K3 and SpaceXAI: Grok 4.7 support prompt caching?
Both publish a cached-input rate: $0.182 per million for Kimi K3 and $0.500 for SpaceXAI: Grok 4.7, against full input rates of $0.192 and $2.00. On a workload with a long stable prefix — a system prompt, a tool schema, a retrieved corpus — that changes the economics more than the headline price does.
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 2026-10-25, 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.