xAI: Grok 4.20 Beta
Analysis Summary
xAI: Grok 4.20 Beta sits in the Emerging tier on our leaderboard, ranked #315 of 556 published models on overall intelligence. At $2.00 input and $6.00 output per 1M tokens, it is among the most expensive on the market. It offers an exceptionally large context window suited to long-document workflows and supports tool use, function calling, vision, and reasoning.
Editorial notes
Grok 4.20 Beta from xAI offers a 2M token context, vision, tool use, and function calling, but has no benchmark data to substantiate its reasoning or coding capability.
Assessed May 14, 2026
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
Performance Profile
Grok 4.20 Beta is xAI's newest flagship model with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherance, delivering consistently precise and truthful responses. Reasoning can be enabled/disabled using the reasoning enabled parameter in the API. Learn more in our docs
Capabilities
How does xAI: Grok 4.20 Beta stack up?
Compare side-by-side with other emerging models.
Model Information
| OpenRouter ID |
x-ai/grok-4.20-beta
|
| Provider | x-ai |
| Release Date | March 12, 2026 |
| Context Length | 2,000,000 tokens |
| Status | Active |
Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $2.00 | $0.002000 |
| Output | $6.00 | $0.006000 |
Live Performance
Live endpoint metrics — refreshed every 30 minutes.
