Grok 4.3
Grok 4.3 is a text generation model from X.ai featuring a 1,000,000-token context window and adjustable reasoning effort.
X.aiLong-context text generation from X.ai
Grok 4.3 is a large language model developed by X.ai, the AI division of X (formerly Twitter). It is designed for text generation tasks and offers a context window of one million tokens, allowing it to process and reason over very long documents or conversation histories in a single pass. The model exposes a configurable reasoning effort setting, giving developers control over the depth of reasoning applied at inference time.
Grok 4.3 is suited for tasks that benefit from extended context, such as analyzing lengthy documents, multi-turn conversations, and complex instruction-following scenarios. Its adjustable reasoning effort input makes it adaptable to workflows where response latency and computational depth need to be balanced. The model is available through MindStudio without requiring separate API key management.
What Grok 4.3 supports
Long Context Window
Processes up to 1,000,000 tokens in a single request, enabling analysis of book-length documents or extended conversation histories.
Adjustable Reasoning
Exposes a reasoning effort selector that lets developers tune how deeply the model reasons before responding, balancing speed against thoroughness.
Text Generation
Generates coherent, instruction-following text across a wide range of formats including summaries, drafts, and structured responses.
Large Response Output
Supports a maximum response size of 2,000,000 tokens, accommodating generation of very long-form outputs in a single call.
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Get Started FreeCommon questions about Grok 4.3
What is the context window size for Grok 4.3?
Grok 4.3 has a context window of 1,000,000 tokens, meaning it can accept up to one million tokens of input in a single request.
What is the maximum response size?
The model supports a maximum response size of 2,000,000 tokens, allowing for very long generated outputs.
What does the Reasoning Effort setting do?
Reasoning Effort is a selectable input that controls how much reasoning the model applies before generating a response. Adjusting it lets you trade off between response speed and reasoning depth.
Does Grok 4.3 support image or video inputs?
Based on available metadata, image and video analysis support is not confirmed for Grok 4.3. The model is listed as a text generation model with text-based inputs.
When was Grok 4.3 released?
Grok 4.3 was released in May 2026 and became available on MindStudio on May 6, 2026.
Is pricing information available for Grok 4.3?
Published pricing for Grok 4.3 is not listed in the available metadata. Check MindStudio or X.ai directly for current pricing details.
Documentation & links
Parameters & options
Control the thinking depth of the model.
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