Claude Opus 4 vs Sonoma Sky Alpha
Compare Claude Opus 4 by Anthropic against Sonoma Sky Alpha by OpenRouter, context windows of 200K vs 2.0M, tested across 34 shared challenges. Updated June 2026.
Which is better, Claude Opus 4 or Sonoma Sky Alpha?
Claude Opus 4 and Sonoma Sky Alpha are both competitive models. Claude Opus 4 costs $15/M input tokens vs $0/M for Sonoma Sky Alpha. Context windows: 200K vs 2000K tokens. Compare their real outputs side by side below.
Key Differences Between Claude Opus 4 and Sonoma Sky Alpha
Claude Opus 4 is made by anthropic while Sonoma Sky Alpha is from openrouter. Claude Opus 4 has a 200K token context window compared to Sonoma Sky Alpha's 2000K. On pricing, Claude Opus 4 costs $15/M input tokens vs $0/M for Sonoma Sky Alpha.
Per 1M tokens
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Style Comparison
Claude Opus 4 uses 4.6x more transitions
