$ diff kimi-k2-8-preview grok-4-6
Kimi K2.8 Preview vs Grok 4.6
Values come from Kimi K2.8 Preview and Grok 4.6, where each is cited to its source. This page states no benchmark result and ranks neither model — it puts two published specifications next to each other. Where a lab has not published a figure, the row says so rather than guessing.
Moonshot AIKimi K2.8 Preview
- context
- 1M
- weights
- closed
- $/M in
- —
- $/M out
- —
- context
- 500K
- weights
- closed
- $/M in
- $2
- $/M out
- $6
What actually differs
- Context window
- Kimi K2.8 Preview takes 1M against 500K — 2× more room in a single request.
- Recency
- Kimi K2.8 Preview shipped 35 days after Grok 4.6 (2026-09-11 vs 2026-08-07).
Full spec
| Attribute | Kimi K2.8 Preview | Grok 4.6 |
|---|---|---|
| Developer | Moonshot AI | xAI |
| Released | 2026-09-11 | 2026-08-07 |
| Context window | 1,000,000 | 500,000 tokens |
| Pricing | not recorded | $2/M input · $6/M output; a request reaching 200K tokens re-prices in full at $4.00/M input · $1.00/M cached input · $12.00/M output |
| License | proprietary | proprietary |
| Availability | Kimi API platform, Kimi Code, Kimi Work | API |