xAI: Grok 4.20
Analysis Summary
xAI: Grok 4.20 sits in the Specialist tier on our leaderboard, ranked #98 of 557 published models on overall intelligence. At $1.25 input and $2.50 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 from xAI delivers a 2M token context, vision, tool use, and function calling at competitive pricing, with an intelligence index of 29 placing it at the lower end of benchmarked models.
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 is a reasoning model from xAI with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherance, delivering..
Capabilities
Performance Indices
Source: Artificial Analysis
Benchmark Scores
Intelligence
Technical
Content
Benchmark data from Artificial Analysis and Hugging Face
How does xAI: Grok 4.20 stack up?
Compare side-by-side with other specialist models.
Model Information
| OpenRouter ID |
x-ai/grok-4.20
|
| Provider | x-ai |
| Release Date | March 31, 2026 |
| Context Length | 2,000,000 tokens |
| Status | Active |
Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $1.25 | $0.001250 |
| Output | $2.50 | $0.002500 |
Live Performance
Live endpoint metrics — refreshed every 30 minutes.
