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FlagshipxAI
Grok 4.20
Grok 4.20 is xAI's flagship multimodal model with text and image capabilities, featuring an extensive 2 million token context window for large-scale processing tasks.
Context 2.0M
Tier Flagship
Modalities text, image
Input from
$1.25 / 1M tokens
across 1 provider
API Pricing
| Provider | Input / 1M | Output / 1M | Cached / 1M |
|---|---|---|---|
| $1.25 | $2.50 | $0.200 |
Prices updated daily. Last check: Sep 8, 2026
Grok 4.20 pricing by provider
Input, output, and batch rates, plus alternatives, for one provider at a time.
Performance & Benchmarks
Source: Artificial Analysis →Intelligence
22.9 / 100
Reasoning & Knowledge
- GPQA Diamond78.5%
- Humanity's Last Exam24.5%
Coding
- SciCode32.2%
Agentic & Tool Use
- Terminal-Bench Hard22.0%
- τ²-bench69.6%
Instruction & Long Context
- IFBench47.8%
- Long-Context Reasoning21.7%
Benchmarks measured Sep 2026. Scores are independent evaluations, not vendor-reported.
Model Details
General
- Creator
- xAI
- Family
- Grok
- Tier
- Flagship
- Context Window
- 2.0M
- Modalities
- Text, Image
Capabilities
- Tool Calling
- No
- Open Source
- No
- Aliases
- grok-4-20-multi-agent
Strengths & Limitations
Strengths
- 2 million token context window enables processing of extremely large documents and conversations
- Multimodal capabilities with support for both text and image inputs
- Flagship-tier model with advanced reasoning capabilities
- Developed by xAI with focus on large-scale information processing
- Can maintain coherent context across very long interactions
- Suitable for analyzing entire codebases or lengthy documents in single sessions
Limitations
- No tool calling or function execution capabilities
- Proprietary model with no open-source access
- Limited modality support compared to models with audio or video capabilities
- Newer entrant in the market compared to established model families
- No batch processing or specialized API features mentioned
Key Features
•2 million token context window
•Text input and generation
•Image input processing
•Multimodal understanding
•Large document analysis
•Extended conversation memory
•Complex reasoning tasks
•Flagship-tier performance
About Grok 4.20
Grok 4.20 is xAI's flagship large language model, representing the most advanced offering in the Grok family. As a proprietary model developed by Elon Musk's AI company, it sits at the top tier of xAI's model lineup and competes with other flagship models in the market.
The model supports both text and image inputs, enabling multimodal understanding and processing tasks. Its standout technical feature is the 2 million token context window, which allows for processing extremely large documents, codebases, or multi-turn conversations that would exceed the limits of most other models. This extensive context capacity makes it suitable for tasks requiring analysis of lengthy content or maintaining coherent dialogue across extended interactions.
Grok 4.20 is positioned for complex reasoning, analysis, and multimodal tasks where the large context window provides a significant advantage. The model's design reflects xAI's focus on creating AI systems capable of handling substantial amounts of information in a single processing session, differentiating it from models with more limited context capabilities.
Common Use Cases
Grok 4.20 is designed for applications requiring extensive context processing and multimodal understanding. Its 2 million token context window makes it particularly valuable for analyzing large documents, entire codebases, research papers, or legal documents in a single session. The model excels at tasks involving lengthy conversations, document summarization, code analysis across multiple files, and complex reasoning tasks that benefit from maintaining extensive context. Organizations dealing with large-scale text analysis, document processing, or applications requiring comprehensive understanding of substantial information volumes will find the model's context capabilities advantageous. The multimodal support also enables use cases involving document analysis with embedded images or visual content understanding alongside text processing.
Frequently Asked Questions
How much does Grok 4.20 cost per million tokens?
Grok 4.20 pricing varies by provider and may include different rates for input and output tokens. Check the pricing table above for current rates across all available providers offering this model.
What is Grok 4.20 best used for?
Grok 4.20 excels at tasks requiring extensive context processing, such as analyzing large documents, codebases, or maintaining coherent long conversations. Its 2 million token context window and multimodal capabilities make it ideal for document analysis, research paper processing, code review across multiple files, and complex reasoning tasks that benefit from substantial context retention.
Does Grok 4.20 support function calling or tool use?
No, Grok 4.20 does not currently support function calling or tool execution capabilities. The model focuses on text generation, multimodal understanding, and large context processing rather than external tool integration or structured function execution.