Grok 4.2 Fast
ZenMux
Grok 4.2 Fast by ZenMux costs $2.00 per 1M input tokens and $6.00 per 1M output tokens, with a 2M-token context window.
Pricing
Input (per 1M tokens)
$2.00
Output (per 1M tokens)
$6.00
Cached input (per 1M)
$0.20
Specifications
- Provider
- ZenMux
- Context window
- 2M tokens
- Parameters
- —
- Released
- Mar 2026
- Open weights
- No
- Frontier model
- No
Compare Grok 4.2 Fast with…
FAQ
How much does Grok 4.2 Fast cost?
Grok 4.2 Fast is priced at $2.00 per 1M input tokens and $6.00 per 1M output tokens. Output tokens cost more than input.
What is Grok 4.2 Fast's context window?
Grok 4.2 Fast supports a context window of 2M tokens — the maximum prompt plus response length it can handle in a single request.
Is Grok 4.2 Fast open weight?
No — Grok 4.2 Fast is a closed/proprietary model accessed via API.
Data as of 2026-10-16. Source: models.dev (open). Pricing is per 1M tokens (USD); confirm with the provider before production use.