Grok 4.20 0309 (Reasoning)
Analysis Summary
Grok 4.20 0309 in its reasoning configuration delivers solid general intelligence alongside a strong agentic index, indicating reliable multi-step task execution and tool orchestration. This combination is valuable for businesses building autonomous workflows rather than simple chat interfaces.
It suits agentic automation, workflow orchestration, and tasks requiring sustained tool use over multiple steps. Its general knowledge and reasoning sit below the current frontier, so it is less ideal for the most demanding analytical or creative writing tasks.
At moderate pricing, it offers a strong balance of agentic capability and cost, making it a sensible pick for teams prioritising automation reliability over raw reasoning depth.
Assessed July 29, 2026
Editorial notes
Grok 4.20 0309 (Reasoning) from xAI combines good general reasoning with very strong agentic performance, making it a capable choice for tool-driven automation.
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
DFO Verdict
Grok 4.20 0309 (Reasoning) from xAI combines good general reasoning with very strong agentic performance, making it a capable choice for tool-driven automation.
How Grok 4.20 0309 (Reasoning) compares
Grok 4.20 0309 (Reasoning) ranks #54 of 395 AI models we track for overall intelligence, #17 of 303 for agentic tasks. At $2.00 per million input tokens it is cheaper than 18% 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 technical. The pulled-in content 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 | $2.00 | $0.002000 |
| Output | $6.00 | $0.006000 |
What would Grok 4.20 0309 (Reasoning) 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 654 models → Price Calculator
These numbers get smaller with the right architecture.
We route routine calls to cheap models and save Grok 4.20 0309 (Reasoning) for the hard ones. Most clients cut their estimate by 60-80%.
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Frequently asked questions about Grok 4.20 0309 (Reasoning)
How much does Grok 4.20 0309 (Reasoning) cost?
Grok 4.20 0309 (Reasoning) costs $2.00 per million input tokens and $6.00 per million output tokens.
Who created Grok 4.20 0309 (Reasoning)?
Grok 4.20 0309 (Reasoning) is developed by xAI and was released on March 10, 2026.
