xAI: Grok 4.20
Analysis Summary
Grok 4.20 is xAI's large-context multimodal model, supporting text, images, files, vision, tool use, and function calling across a 2M token window. That capacity is useful for extensive document collections and complex prompt context, but the measured reasoning, instruction-following, long-context, and terminal results are below the leading production models. Its pricing is $1.25 per million input tokens and $2.50 per million output tokens.
It fits document-heavy assistants, multimodal research, structured content workflows, and supervised tool calling. The broad context and API features are practical advantages, yet teams should not equate them with reliable autonomous performance. Use it where context size is a priority, add approval gates around external actions, and compare it with stronger reasoning models for high-stakes analysis or client-facing decisions.
Assessed August 9, 2026
Editorial notes
Grok 4.20 combines a 2M token context with vision, file handling, function calling, and tool use for large multimodal workflows. Its measured reasoning and terminal performance are limited, so autonomous execution needs supervision.
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
DFO Verdict
Grok 4.20 combines a 2M token context with vision, file handling, function calling, and tool use for large multimodal workflows. Its measured reasoning and terminal performance are limited, so autonomous execution needs supervision.
Benchmark scores
Magenta = intelligence · Ink = technical/agentic · Cyan = content & long-context · Grey = community benchmarks. Data: Artificial Analysis, Hugging Face.
38 Intelligence Index
How xAI: Grok 4.20 compares
XAI: Grok 4.20 ranks #74 of 425 AI models we track for overall intelligence. 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 23% of comparable models.
Dark bar = input · light bar = output, scaled to the priciest peer.
1M tokens ≈ 8 full-length novels or ~2,500 pages of business documents in a single request.
Strongest on business fit. The pulled-in technical corner is the trade-off, and if the shape matters more than the price, this is your model.
Compare shapes side-by-side →Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $1.25 | $0.001250 |
| Output | $2.50 | $0.002500 |
What would xAI: Grok 4.20 cost your business?
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A website chatbot handling around 100 customer conversations a day, a few short messages each.
Full calculator with 704 models → Price Calculator
These numbers get smaller with the right architecture.
We route routine calls to cheap models and save xAI: Grok 4.20 for the hard ones. Most clients cut their estimate by 60-80%.
Talk to our teamAbout xAI: Grok 4.20
Grok 4.20 is a reasoning model from SpaceXAI with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherance, delivering..
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).
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.