Review
Grok Review
xAI's Grok models, their real-time X integration, and how they price against the field.
SpaceXAI: Grok 4.20
x-ai/grok-4.20
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...
Listed (31 Mar 2026)
Source: OpenRouter (live)
- Input
- $1.25
- USD per 1M tokens
- Output
- $2.50
- USD per 1M tokens
- Blended
- $1.56
- 75% in / 25% out
- Context
- 2.0M
- tokens
- Max output
- 1.8M
- tokens
- Modality
- text+image+file->text
Prices as listed on OpenRouter, refreshed every five minutes. Provider-direct prices may differ. Convert to your currency on the AI Tracker.
Capabilities
Declared on the listing
- Tool / function calling Declared
- Reasoning controls Declared
- Structured output Declared
- InputText, Image, File
- OutputText
Capabilities are read from the provider listing. “Not declared” means the listing does not advertise the feature, not that it is absent.
Why it costs this
Pricing context
- 2.0× median
- Market median blended price is $0.800/M across 417 priced models.
Alternatives
More from xAI
$3.00
/M blended
$3.00
/M blended
$1.25
/M blended
$1.25
/M blended
$1.56
/M blended
$1.56
/M blended
Alternatives
Similar price, other providers
Qwen (Alibaba)
$1.56
/M blended
Qwen (Alibaba)
$1.56
/M blended
Google
$1.50
/M blended
Google
$1.50
/M blended
Google
$1.50
/M blended
$1.50
/M blended
Within ±50% of $1.56/M blended.
Analysis
Related reading
Elon Musk's lab behind the Grok models. All xAI models · Official site
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