xAI: Grok 4.5
Analysis Summary
xAI's Grok 4.5 combines strong coding performance with good reasoning results and a 500K-token context. It supports vision, tool use, and function calling, making it applicable to codebase analysis, multimodal review, and workflows that need external actions. Its supplied agentic result is useful but does not put it in the same class as the strongest agent-focused systems.
For business teams, it is a reasonable candidate for coding assistance and tool-enabled analysis, especially when long context is valuable. The listed price is $2 per million input tokens and $6 per million output tokens, so cost should be considered for frequent generation. Run it against the current model stack on real tasks, including agent completion rates and factual checks. Use it for work where its coding and context strengths matter, rather than routing all routine content through it.
Assessed September 23, 2026
Editorial notes
Grok 4.5 pairs strong coding with high-quality reasoning results, a 500K context, vision, and tool calling; premium pricing limits its appeal for routine volume.
The DFO score ranks models on the Artificial Analysis Intelligence Index and is refreshed as new models launch. The write-up and verdict are our own. Feedback?
DFO Verdict
Grok 4.5 pairs strong coding with high-quality reasoning results, a 500K context, vision, and tool calling; premium pricing limits its appeal for routine volume.
Benchmarks
Artificial Analysis data refreshed Sep 30, 2026. Arena ratings from the Sep 25, 2026 text leaderboard, with style control. Bars: magenta = reasoning, ink = coding and agents, cyan = instructions and long context.
How xAI: Grok 4.5 compares
XAI: Grok 4.5 ranks #27 of 431 AI models we track for overall intelligence, #17 of 198 for coding, #24 of 181 for agentic tasks. Its 500K-token context window is larger than 79% of the models we list. At $2.00 per million input tokens it is cheaper than 17% 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.
Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $2.00 | $0.002000 |
| Output | $6.00 | $0.006000 |
What would xAI: Grok 4.5 cost your business?
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A website chatbot handling around 100 customer conversations a day, a few short messages each.
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These numbers get smaller with the right architecture.
We route routine calls to cheap models and save xAI: Grok 4.5 for the hard ones. Most clients cut their estimate by 60-80%.
Talk to our teamAbout xAI: Grok 4.5
Grok 4.5 is a model from SpaceXAI with frontier performance on coding, knowledge work, and STEM.
Frequently asked questions about xAI: Grok 4.5
How much does xAI: Grok 4.5 cost?
xAI: Grok 4.5 costs $2.00 per million input tokens and $6.00 per million output tokens.
What is the context window of xAI: Grok 4.5?
xAI: Grok 4.5 has a context window of 500,000 tokens (500K).
Is xAI: Grok 4.5 good for coding?
On our coding benchmark index, xAI: Grok 4.5 ranks #17 of 198 models, placing it in the top quartile of the field for code generation and debugging.
What can xAI: Grok 4.5 do?
xAI: Grok 4.5 supports image/vision input, tool use, and function calling.
Who created xAI: Grok 4.5?
xAI: Grok 4.5 is developed by xAI and was released on July 8, 2026.