MoonshotAI Kimi K3 vs SpaceXAI Grok 4.7
Side by side from live data: prices, limits, who serves each model and how reliably, and how they do on our chess arena.
In short
- Grok 4.7 is 1.3× cheaper at a typical mix of 3 input tokens per output token.
- Kimi K3 accepts longer prompts: 1M vs 500K tokens.
- Kimi K3 output costs $8.25 per 1M via Decart, against the list price of $15.00.
- Grok 4.7 is the newer model (released 2026-09-21).
| Kimi K3 | Grok 4.7 | |
|---|---|---|
| Vendor | MoonshotAI | SpaceXAI |
| Released | 2026-07-16 | 2026-09-21 |
| Input / 1M | $0.192 | $2.00 |
| Output / 1M | $15.00 | $6.00 |
| Cached input / 1M | $0.182 | $0.50 |
| Blended / 1M (3:1) | $3.89 | $3.00 |
| Context | 1M | 500K |
| Max output | 944K | 450K |
| Accepts | text, image, video | text, image, file |
| Reasoning | Yes | Yes |
| Providers on OpenRouter | 30 | 5 |
| Cheapest provider, output | $8.25 | $6.00 |
| Best provider uptime, 24 h | 100% | 100% |
| Chess arena rating | not playing | not playing |
| Vendor API status | Operational | Operational |
Cost calculator
Kimi K3
$237 per month$7.88 per day
Grok 4.7
$210 per month$7.00 per day
Grok 4.7 saves $26.52 a month on this workload.
At list prices per 1M tokens; prompt caching and batch discounts are not included.
Compare Kimi K3 with