xAI: Grok 4.20
Analysis Summary
Grok 4.20 is an earlier xAI model with a 2M token context window, vision, file input, tool use, and function calling. Its intelligence index of 29 and coding index of 22 place it in the moderate tier, and its long-context reasoning score is low despite the large context window. Pricing at $1.25 input and $2.50 output per million tokens is competitive.
For businesses, the 2M context is a genuine advantage for very long document workflows, but the limited reasoning depth means it is better suited to retrieval and summarisation tasks than complex analysis or coding. Its agentic score of 38.3 is below average for tool-use pipelines.
Grok 4.20 is a reasonable option for teams that specifically need a very large context window at a moderate price, but most business workloads will be better served by more capable models in a similar price range.
Assessed June 9, 2026
Editorial notes
Grok 4.20 from xAI has a 2M token context window and broad modality support, but moderate reasoning and coding scores limit its fit for complex business tasks.
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
Performance Profile
How xAI: Grok 4.20 compares
XAI: Grok 4.20 ranks #115 of 378 AI models we track for overall intelligence, #134 of 315 for coding, #112 of 289 for agentic tasks. Its 2M-token context window is larger than 100% of the models we list. At $1.25 per million input tokens it is cheaper than 21% of comparable models.
About xAI: Grok 4.20
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 professional 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.
Leaderboard Categories
External Resources
Frequently asked questions about xAI: Grok 4.20
How much does xAI: Grok 4.20 cost?
xAI: Grok 4.20 costs $1.25 per million input tokens and $2.50 per million output tokens.
What is the context window of xAI: Grok 4.20?
xAI: Grok 4.20 has a context window of 2,000,000 tokens (2M).
Is xAI: Grok 4.20 good for coding?
On our coding benchmark index, xAI: Grok 4.20 ranks #134 of 315 models, placing it in the broader range of the field for code generation and debugging.
What can xAI: Grok 4.20 do?
xAI: Grok 4.20 supports image/vision input, tool use, and function calling.
Who created xAI: Grok 4.20?
xAI: Grok 4.20 is developed by xAI and was released on March 31, 2026.
