Grok 4.20
- In Input modalities: TextImage Out Output modalities: Text
- Reasoning
- Tool use
- Structured output
Prices
1 offering · prices as listedgrok-4.20-0309-reasoning| Conditions/ 1M tokens | Input | Cache read | Output |
|---|---|---|---|
| Standard | $1.25 | $0.20 | $2.50 |
| Prompts over 200K tokens | $2.50 | $0.40 | $5.00 |
Prices from xAI models and pricing (opens in a new tab) (checked Nov 8, 2026)
Standard: the price a request with no conditions pays (the headline price elsewhere on the site).
Details
- Open weights
- —
- Family
- grok
- Model ID
Not stated on xAI’s pages: max input, reasoning efforts, reasoning can be off, max thinking budget, built-in tools, knowledge cutoff, aliases.
Cited scores
From third-party leaderboards, not measured by us- Epoch AI · Chess Puzzles 29%
#48 of 85 listed models · ±4.56
- Epoch AI · FrontierMath Tier 4 v2 17.1%
#50 of 65 listed models · ±5.95
- Epoch AI · FrontierMath Tiers 1–3 44.9%
#56 of 84 listed models · ±2.95
- Epoch AI · GPQA Diamond 89.3%
#49 of 168 listed models · ±1.86
- Epoch AI, 'Capabilities & benchmarking'. Published online at epoch.ai. Retrieved from 'https://epoch.ai/benchmarks'. Licensed CC BY 4.0. · License · as of Oct 28 – Nov 5, 2026
- changes we made
Changes
All changes →No changes recorded yet.
Sources
- xAI models and pricing (opens in a new tab) docs.x.ai · checked Nov 8, 2026
- Grok 4.20 (Reasoning) model (opens in a new tab) docs.x.ai · checked Nov 8, 2026
- models.dev: grok-4.20-0309-reasoning (community data, MIT) (opens in a new tab) github.com · checked Sep 30, 2026
- xAI release notes (opens in a new tab) docs.x.ai · checked Nov 6, 2026
xAI’s official policies: data use, privacy, terms →
Some values on this page are still waiting to be checked against official pages: a filled dot is verified, a hollow one is not yet (with or without a source on file). How we verify data
xAI · United States · x.ai
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