Grok 4.20 (Reasoning)
Reasoning Grok for document-heavy analysis and long-horizon tool use
- Price per 1M tokens
- $1.25 / $2.5 input / output · xAI
- Context window
- 1M tokens in · 30K out
- Since the last one
- 112 days after Grok 4.1
Since Grok 4.1
11 releases in the Grok 4.7 line.
Grok-1.5Mar 28, 2024138dGrok-2 BetaAug 13, 2024330dGrok 4Jul 9, 2025131dGrok 4.1Nov 17, 2025112dGrok 4.20 (Non-Reasoning)Mar 9, 20260dGrok 4.20 (Reasoning)Mar 9, 202639dGrok 4.3Apr 17, 2026
Released112 days later
A newer release is out: Grok 4.7.
BENCHMARKS
Not in the Epoch Capabilities Index. Epoch benchmarks what it can run, so this is a gap in coverage, not a poor result.
xAI's past year
19 release days in the past year, about one every 19 days. The next is expected around Nov 10, 2026. Forecasts ↗
NovDecJanFebMarAprMayJunJulAugSepOctNov
Specifications
RELEASE DATEMar 9, 2026
WEIGHTSClosed weights
CONTEXT WINDOW1M
MAX OUTPUT30K
REASONINGNot listed
TOOL CALLINGNot listed
INPUTStext, image/jpeg, image/png, application/pdf
OUTPUTStext
Specifications and prices from Models.dev; availability and limits may differ by provider. Benchmarks from Epoch AI (CC BY 4.0), LiveBench and the other sources named above.