POST /v1/chat/completionsGrok 4.3
grok-4.3Grok 4.3 is xAI’s reasoning model with text and image input, configurable reasoning effort, function calling, and structured output support. xAI and third-party descriptions emphasize long-context use, agent workflows, instruction following, and factual accuracy. It should be introduced as a reasoning-and-agent model rather than only an X-connected chatbot.
Total Context
1Mtokens
Max Output
30Ktokens
Released
Apr 17, 2026
Modalities
Grok 4.3 Price
| Input Price | Output Price | Cache Read |
|---|---|---|
| $1.25/M | $2.5/M | $0.2/M |
Grok 4.3 API
Grok 4.3 Benchmark
37.6
/100
Artificial Analysis Intelligence Index
Artificial Analysis broad capability aggregate
Index score
41
/100
Artificial Analysis Coding Index
Artificial Analysis software task aggregate
Index score
Knowledge & Reasoning
GPQA
Advanced science problem solving
90.1%
HLE
Broad expert-level exam set
35%
Coding & Engineering
SciCode
Scientific coding challenges
47.3%
Terminal-Bench Hard
Hard terminal task execution
37.9%
Instruction Following & Agent Tasks
IFBench
Prompt constraint adherence
81.3%
AA-LCR
Long-context reasoning
64.3%
τ²-Bench
Agent workflow tasks
97.7%
Metrics sourced from Artificial Analysis
Frequently asked questions about Grok 4.3
Understand what Grok 4.3 is, its best uses, distinguishing strengths, practical tradeoffs, and safe TokenHub integration guidance.
What is Grok 4.3, and where does it fit in xAI’s model lineup?+
Grok 4.3 is xAI’s general frontier model with configurable reasoning, long-context processing, and agent-oriented tool use. It is a current public model in its provider’s documentation, though availability can vary by platform.
Which workloads are the best fit for Grok 4.3?+
Best-fit scenarios include complex multi-step reasoning, analysis of long documents and datasets, and reliable execution of multi-step agent workflows. Test representative inputs and define measurable acceptance criteria before production.
Why might a team select Grok 4.3 over a smaller or older model?+
Key strengths include configurable reasoning effort, strong handling of long context, and effective use of tools and function calls. This combination is especially useful for analysis of long documents and datasets.
What should be validated before relying on Grok 4.3?+
Consider another model when a simple request does not need extra reasoning effort, the workflow cannot include human review for important decisions, or the required deployment platform does not list this model. Verify important factual, legal, financial, medical, or operational outputs with qualified human review.
What is the practical TokenHub setup guidance for Grok 4.3?+
In TokenHub, select the exact model identifier displayed for Grok 4.3, use the endpoint documented for your account, and authenticate with your TokenHub credentials. Check the TokenHub page for the exact Grok identifier, available reasoning controls, tool access, supported inputs, and current beta or release status.
Media and Discussions
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