AI Model Release Tracker - Timeline of Major AI Models from 2022-2026

Claude 3 Sonnet vs Grok 4.20 Beta

Anthropic
Claude 3 Sonnet
xAI
Grok 4.20 Beta
Overview
CompanyAnthropicxAI
Release dateMar 4 2024Feb 17 2026
Model type
Open sourceNoNo
Specifications
Parameters
Context window
Benchmarks
Science
GPQA Diamond
40.4%
Timeline
Release gapClaude 3 Sonnet shipped 715 days before Grok 4.20 Beta

Which is better: Claude 3 Sonnet or Grok 4.20 Beta?

Claude 3 Sonnet and Grok 4.20 Beta don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Claude 3 Sonnet shipped 715 days before Grok 4.20 Beta, so benchmark comparisons should account for the intervening progress.

Published specifications for these two models are limited — see each model page for the latest details.

Direct benchmark comparisons are unavailable — Claude 3 Sonnet and Grok 4.20 Beta don't publish scores on any of the same benchmarks.

Frequently asked questions

When was Claude 3 Sonnet released?
Claude 3 Sonnet was released by Anthropic on Mar 4 2024.
When was Grok 4.20 Beta released?
Grok 4.20 Beta was released by xAI on Feb 17 2026.

Other comparisons