Grok 4.20 (Reasoning)
xAI
Grok 4.20 (Reasoning) by xAI costs $1.25 per 1M input tokens and $2.50 per 1M output tokens, with a 1M-token context window.
Pricing
Input (per 1M tokens)
$1.25
Output (per 1M tokens)
$2.50
Cached input (per 1M)
$0.20
Specifications
- Provider
- xAI
- Context window
- 1M tokens
- Parameters
- —
- Released
- Mar 2026
- Open weights
- No
- Frontier model
- No
Benchmarks
- LiveBench
- 69.0
Compare Grok 4.20 (Reasoning) with…
Grok 4.20 (Reasoning) vs gemini-2.5-flash-preview-09-2025$2.50/1MGrok 4.20 (Reasoning) vs Gemini 2.5 Flash$2.50/1MGrok 4.20 (Reasoning) vs Gemini 3.5 Flash Lite$2.50/1MGrok 4.20 (Reasoning) vs Kimi K2 Thinking$2.50/1MGrok 4.20 (Reasoning) vs Kimi K2.5$2.50/1MGrok 4.20 (Reasoning) vs Grok 4.3$2.50/1M
FAQ
How much does Grok 4.20 (Reasoning) cost?
Grok 4.20 (Reasoning) is priced at $1.25 per 1M input tokens and $2.50 per 1M output tokens. Output tokens cost more than input.
What is Grok 4.20 (Reasoning)'s context window?
Grok 4.20 (Reasoning) supports a context window of 1M tokens — the maximum prompt plus response length it can handle in a single request.
Is Grok 4.20 (Reasoning) open weight?
No — Grok 4.20 (Reasoning) 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.