Overview
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...
xAI: Grok 4.20 in depth
xAI: Grok 4.20, built by xAI, sits in the chatbots & llms space and is a paid tool starting at $1.25/1M tokens. Our editors rate it 9.2 out of 10 based on capability, ecosystem and value. It handles a context window of 2,000,000 tokens.
On the feature side, xAI: Grok 4.20 brings 2,000,000-token context window, vision (image input), reasoning / chain-of-thought and tool / function calling. These are the capabilities that most shape day-to-day use and separate it from thinner alternatives.
xAI: Grok 4.20 is most often chosen for research and writing. If that matches your goals, it's a strong candidate to shortlist.
Key features
- ✓2,000,000-token context window
- ✓Vision (image input)
- ✓Reasoning / chain-of-thought
- ✓Tool / function calling
- ✓Structured (JSON) outputs
- ✓Knowledge cutoff 2025-09-01
Pricing
Pros
Cons
Who should use xAI: Grok 4.20
- →Anyone looking for a chatbots & llms tool from xAI.
- →Teams and individuals focused on research and writing.
- →Workflows that need a 2,000,000 tokens context window.
Who should look elsewhere
- →Anyone who needs a free tier — this tool is paid only.
Best for
xAI: Grok 4.20 alternatives
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ChatGPT
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ChatGPT is OpenAI's flagship conversational AI, powering hundreds of millions of weekly users across web, mobile and API. Built on the GPT-4o and GPT-5 family of models, it handles text, images, voice and code in a single interface. With browsing, data analysis, custom GPTs and a vast plugin ecosystem, it remains the default assistant for most knowledge workers.
Gemini
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Gemini is Google's natively multimodal model family, deeply integrated across Search, Workspace, Android and the Pixel line. Its standout feature is an enormous context window of up to one to two million tokens, ideal for analysing long videos, codebases and document sets. Gemini blends Google's real-time knowledge with strong reasoning and is available free in many products.
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Frequently asked questions
Q. Is xAI: Grok 4.20 free?
No — xAI: Grok 4.20 is a paid tool, starting at $1.25/1M tokens.
Q. How much does xAI: Grok 4.20 cost?
xAI: Grok 4.20 starts at $1.25/1M tokens. API usage is around $1.25 per 1M input tokens and $2.5 per 1M output tokens.
Q. What is xAI: Grok 4.20 best for?
xAI: Grok 4.20 is best suited to research and writing, within the chatbots & llms category.
Q. What are the best xAI: Grok 4.20 alternatives?
Popular alternatives to xAI: Grok 4.20 include Claude, ChatGPT, Gemini and Anthropic: Claude Sonnet 5. Each trades off price, quality and ecosystem differently.
How we rate AI tools
Our quality score weighs capability on real tasks, breadth of features and integrations, pricing and value, and how actively the tool is maintained. Scores are editorial guidance, not benchmarks — always trial a tool on your own workflow before committing. Pricing and features change frequently, so verify current details on the official site.
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