Grok 4.20 is xAI's current flagship with a 2M token context window, real-time X data access, and strong reasoning performance. At $2/$6 per 1M tokens it undercuts most US frontier models while matching them on many benchmarks.
Input Price
$2.00/1M
per 1M tokens
Output Price
$6.00/1M
per 1M tokens
Context Window
2M tokens
max tokens
ELO Score
1380
LMSYS Arena
Pricing Breakdown
| Volume | Input Cost | Output Cost | Combined (50/50) |
|---|---|---|---|
| 1,000 tokens | $0.0020 | $0.0060 | $0.0040 |
| 10,000 tokens | $0.0200 | $0.0600 | $0.0400 |
| 100,000 tokens | $0.2000 | $0.6000 | $0.4000 |
| 1,000,000 tokens | $2.0000 | $6.0000 | $4.0000 |
Strengths
- ✓2M token context window — tied for largest available
- ✓Real-time X (Twitter) data access
- ✓Strong reasoning and multi-agent variants
- ✓Native image input
Weaknesses
- ✗Smaller hosting ecosystem than OpenAI/Anthropic
- ✗Tool invocations (web search, code exec) add $2.50-$5 per 1k calls
Compare Grok 4.20 With
Frequently Asked Questions
How much does Grok 4.20 cost?
Grok 4.20 costs $2.00/1M per 1M input tokens and $6.00/1M per 1M output tokens.
What is Grok 4.20's context window?
Grok 4.20 has a context window of 2M tokens, which means it can process up to 2,000,000 tokens in a single request.
Is Grok 4.20 open source?
No, Grok 4.20 is a proprietary model by xAI and is not open source.
What is Grok 4.20 best used for?
Grok 4.20 is best suited for: reasoning, research, long-context, coding, creative-writing. 2M token context window — tied for largest available.
What is Grok 4.20's ELO score?
Grok 4.20 has an ELO score of 1380 on the LMSYS Chatbot Arena leaderboard, placing it among top-tier models.