Claude Sonnet 4 vs xAI: Grok 4.3
Compare Claude Sonnet 4 by Anthropic against xAI: Grok 4.3 by xAI, context windows of 200K vs 1.0M, tested across 53 shared challenges. Updated May 2026.
Which is better, Claude Sonnet 4 or xAI: Grok 4.3?
Claude Sonnet 4 and xAI: Grok 4.3 are both competitive models. Claude Sonnet 4 costs $3/M input tokens vs $1.25/M for xAI: Grok 4.3. Context windows: 200K vs 1000K tokens. Compare their real outputs side by side below.
Key Differences Between Claude Sonnet 4 and xAI: Grok 4.3
Claude Sonnet 4 is made by anthropic while xAI: Grok 4.3 is from xai. Claude Sonnet 4 has a 200K token context window compared to xAI: Grok 4.3's 1000K. On pricing, Claude Sonnet 4 costs $3/M input tokens vs $1.25/M for xAI: Grok 4.3.
Per 1M tokens
xAI: Grok 4.3 is cheaper on both — 2.4× input, 6.0× output
No community votes yet. On paper, xAI: Grok 4.3 has the edge — newer, bigger context window.
xAI: Grok 4.3 is 6.0x cheaper per token — worth considering if cost matters.
Style Comparison
Claude Sonnet 4 uses 87.9x more emoji
