Grok 4.20 0309 (Reasoning)
Analysis Summary
Grok 4.20 0309 Reasoning is a recent xAI reasoning variant with a measured intelligence level just below the stronger tier of models in this dataset. Its record does not include separate coding, agentic, context, speed, vision, or function-calling results, so claims about specialised workflow performance should remain constrained.
The strongest practical signal is price. With input pricing of 2 and output pricing of 6 in the supplied data, it could be evaluated for high-volume reasoning, technical drafting, and internal analysis where the quality target is below flagship level. It is not yet a proven default for autonomous agents or high-stakes client-facing content. Use it as a cost-conscious candidate, with human review and task-specific evaluations before wider adoption.
Assessed September 7, 2026
Editorial notes
Grok 4.20 Reasoning combines mid-tier measured intelligence with clear low pricing, making it a practical candidate for volume reasoning and technical tasks. The supplied record lacks detailed coding, context, and tool-use metrics.
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
DFO Verdict
Grok 4.20 Reasoning combines mid-tier measured intelligence with clear low pricing, making it a practical candidate for volume reasoning and technical tasks. The supplied record lacks detailed coding, context, and tool-use metrics.
How Grok 4.20 0309 (Reasoning) compares
Grok 4.20 0309 (Reasoning) ranks #99 of 438 AI models we track for overall intelligence. 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 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 | $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 776 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.