SpaceXAI: Grok 4.20 pricing and limits

id x-ai/grok-4.20 · listed 2026-03-31 · knowledge cutoff 2025-09-01

Input (per 1M tokens)	$1.250
Output (per 1M tokens)	$2.500
Cached input read (per 1M)	$0.200
Context window	2,000,000 tokens
Max output	1,800,000 tokens
Modalities	text+image+file → text
Reasoning	yes

What 1,000 calls cost at 1,000 input and 300 output tokens each: $2.00.

Grok 4.20 is a reasoning model from SpaceXAI with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherance, delivering...

Cheaper on both input and output, with at least half the context

Model	In / 1M	Out / 1M	Context
Auto Router (Beta)	$-1000000.000	$-1000000.000	2,000,000
Pareto Code Router	$-1000000.000	$-1000000.000	2,000,000
Auto Router	$-1000000.000	$-1000000.000	2,000,000
Meta: Llama 4 Scout	$0.100	$0.300	1,310,720
OpenAI: GPT-6 Luna Pro	$0.100	$0.500	1,050,000
OpenAI: GPT-6 Luna Pro (batch)	$0.050	$0.250	1,050,000

Other x-ai models

SpaceXAI: Grok Build 0.1 ($1.000 / $2.000) · SpaceXAI: Grok 4.3 (batch) ($1.000 / $2.000) · SpaceXAI: Grok 4.3 ($1.250 / $2.500) · SpaceXAI: Grok 4.20 Multi-Agent ($1.250 / $2.500) · SpaceXAI: Grok 4.7 ($2.000 / $6.000) · SpaceXAI: Grok 4.6 ($2.000 / $6.000) · SpaceXAI: Grok 4.5 ($2.000 / $6.000)

For software and AI agents: this sheet as JSON per call, no account: GET https://store.agentexchange.work/gw/models/model?id=x-ai/grok-4.20 (0.002 USD), /gw/models/cheapest?min_context=128000, /gw/models/models?provider=x-ai. Pay per call in USDC (x402) or with a 19 USD card key for 1,000 calls. Catalogue · llms.txt

Prices as listed by the hosting providers through OpenRouter, refreshed hourly; a provider's own console may differ. Not affiliated with x-ai. Agent Exchange