Model Details
Released
Mar 9, 2026
Context Length
1,000,000
Where is grok-4.20-reasoning a perfect fit?
Grok 4.20 Reasoning is xAI's high-performance reasoning model designed for complex problem solving, low hallucination rates, and strong agentic tool calling. It combines extended reasoning with strict prompt adherence for professional and enterprise applications.
- Complex mathematical, scientific, and engineering reasoning
- Advanced coding, debugging, and software architecture tasks
- Multi-step autonomous agents using external tools
- Long-context document and codebase analysis
- Enterprise knowledge assistants requiring high factual accuracy
- Structured data extraction and JSON generation
- Research, planning, and technical writing
- Applications prioritizing reasoning quality over minimum latency
- Complex mathematical, scientific, and engineering reasoning
- Advanced coding, debugging, and software architecture tasks
- Multi-step autonomous agents using external tools
- Long-context document and codebase analysis
- Enterprise knowledge assistants requiring high factual accuracy
- Structured data extraction and JSON generation
- Research, planning, and technical writing
- Applications prioritizing reasoning quality over minimum latency
Quick Model Estimate
Your grok-4.20-reasoning Cost Estimate
💰 Total Cost
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for 1000 input + 1000 output tokens
📥 Input (1000 × $1.250000)
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📤 Output (1000 × $2.500000)
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Cost Breakdown
📥 Input
📤 Output
Prices updated daily from official provider data.
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 Perplexity | Text | Standard | $1.2500 | $2.5000 | $0.2000 | 0 – 200,000 tokens | → |
| Perplexity | Text | Standard | $2.5000 | $5.0000 | N/A | 200,000+ tokens | → |
FAQs about grok-4.20-reasoning
How much does grok-4.20-reasoning cost per 1M tokens?
grok-4.20-reasoning costs between $1.25 and $2.50 per million input tokens, and between $2.50 and $5.00 per million output tokens.
What does a typical workload cost with grok-4.20-reasoning?
1,000 requests of 2,000 input and 500 output tokens each — 2,000,000 input and 500,000 output tokens in total — costs $3.75 with grok-4.20-reasoning at its lowest rates. Use the calculator on this page for your own volumes.
Where can I use grok-4.20-reasoning?
grok-4.20-reasoning is available through Perplexity, from $1.25 per million input tokens.
What is grok-4.20-reasoning's context window?
grok-4.20-reasoning has a context window of 1,000,000 tokens.