xAI: Grok 4
Analysis Summary
Grok 4 is xAI's multimodal model for technical and agentic work, with a 256K context window, vision, file input, tool use, and function calling. Its mathematics, coding, and tool-oriented benchmark results are strong, and the context size supports substantial codebases, research collections, and operational documents.
The model is a good fit for software engineering assistants, technical research, structured analysis, and agents that need to call external functions. Its long-context result is useful for document-heavy work, while instruction following is adequate for controlled content pipelines. General reasoning is less dominant than the technical benchmark profile, so editorially sensitive tasks still benefit from review.
Pricing is premium, particularly for output. Use Grok 4 when coding, multimodal analysis, and tool execution justify the higher per-call cost.
Assessed September 7, 2026
Editorial notes
Grok 4 combines strong mathematics and coding performance with a 256K context window, vision, tool use, and function calling. It is suited to technical agents and multimodal analysis, with premium output pricing and uneven general reasoning as trade-offs.
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
DFO Verdict
Grok 4 combines strong mathematics and coding performance with a 256K context window, vision, tool use, and function calling. It is suited to technical agents and multimodal analysis, with premium output pricing and uneven general reasoning as trade-offs.
Benchmark scores
Magenta = intelligence · Ink = technical/agentic · Cyan = content & long-context · Grey = community benchmarks. Data: Artificial Analysis, Hugging Face.
22.5 Intelligence Index·92.7 Math Index
How xAI: Grok 4 compares
XAI: Grok 4 ranks #124 of 443 AI models we track for overall intelligence. Its 256K-token context window is larger than 56% of the models we list. At $3.00 per million input tokens it is cheaper than 10% 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 | $3.00 | $0.003000 |
| Output | $15.00 | $0.015000 |
What would xAI: Grok 4 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 798 models → Price Calculator
These numbers get smaller with the right architecture.
We route routine calls to cheap models and save xAI: Grok 4 for the hard ones. Most clients cut their estimate by 60-80%.
Talk to our teamAbout xAI: Grok 4
Grok 4 is xAI's latest reasoning model with a 256k context window. It supports parallel tool calling, structured outputs, and both image and text inputs. Note that reasoning is not..
Frequently asked questions about xAI: Grok 4
How much does xAI: Grok 4 cost?
xAI: Grok 4 costs $3.00 per million input tokens and $15.00 per million output tokens.
What is the context window of xAI: Grok 4?
xAI: Grok 4 has a context window of 256,000 tokens (256K).
What can xAI: Grok 4 do?
xAI: Grok 4 supports image/vision input, tool use, and function calling.
Who created xAI: Grok 4?
xAI: Grok 4 is developed by xAI and was released on July 9, 2025.