LIVE INTELLIGENCE · part of the Xentir AI Index

Grok 4.20 (4.20 0309 Reasoning)

xAI · Status: Active · Released 2026-02-17 · Accessibility: API access

“Epoch AI, 'AI Benchmarking Hub'. Published online at epoch.ai. Retrieved from 'https://epoch.ai/benchmarks' [online resource].” · epoch.ai/benchmarks · Licensed CC BY 4.0 · data last verified 2026-07-26 · Methodology · Data Sources

Xentir Snapshot

Best forScores in the top 11% of models measured on Epoch Capabilities Index (ECI) (152.6).

Watch out forNot yet measured on 4 of the 9 benchmarks Xentir tracks — see the breakdown below.

Benchmark breakdown

Benchmark	Score	Source
Epoch Capabilities Index (ECI)	152.6	Epoch AI Benchmarking Hub
SWE-bench Verified	Not measured	Epoch AI Benchmarking Hub
GPQA Diamond	0.893	Epoch AI Benchmarking Hub
MATH Level 5	Not measured	Epoch AI Benchmarking Hub
OTIS Mock AIME 2024-2025	0.922	Epoch AI Benchmarking Hub
FrontierMath	Not measured	Epoch AI Benchmarking Hub
FrontierMath Tier 4	Not measured	Epoch AI Benchmarking Hub
SimpleQA Verified	0.351	Epoch AI Benchmarking Hub
Chess Puzzles	0.240	Epoch AI Benchmarking Hub

Benchmark results measure specific tasks and should not be treated as a universal measure of model quality.

Pricing

No licensed per-token pricing exists for this model yet. Not shown as an estimate — see Data Sources.

History

History begins 2026-07-26 — one data point so far. A trend needs at least two.

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vs Qwen3.7-Max →

Latest Xentir coverage

No Xentir coverage of this model yet. See the latest AI news.

Sources and methodology

Scores on this page come from Epoch AI Benchmarking Hub, licensed CC BY 4.0. See the full methodology and data sources pages for how rankings, variants and ties are computed, and the full AI Model Rankings table for how Grok 4.20 (4.20 0309 Reasoning) compares to every other measured model.