Claude Opus 4.1 vs MoonshotAI: Kimi K2 0905
Compare Claude Opus 4.1 by Anthropic against MoonshotAI: Kimi K2 0905 by Moonshot AI, context windows of 200K vs 262K, tested across 53 shared challenges. Updated May 2026.
Which is better, Claude Opus 4.1 or MoonshotAI: Kimi K2 0905?
Claude Opus 4.1 and MoonshotAI: Kimi K2 0905 are both competitive models. Claude Opus 4.1 costs $15/M input tokens vs $0.6/M for MoonshotAI: Kimi K2 0905. Context windows: 200K vs 262K tokens. Compare their real outputs side by side below.
Key Differences Between Claude Opus 4.1 and MoonshotAI: Kimi K2 0905
Claude Opus 4.1 is made by anthropic while MoonshotAI: Kimi K2 0905 is from moonshotai. Claude Opus 4.1 has a 200K token context window compared to MoonshotAI: Kimi K2 0905's 262K. On pricing, Claude Opus 4.1 costs $15/M input tokens vs $0.6/M for MoonshotAI: Kimi K2 0905.
Per 1M tokens
MoonshotAI: Kimi K2 0905 is cheaper on both — 25× input, 30× output
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
MoonshotAI: Kimi K2 0905 is 30x cheaper per token — worth considering if cost matters.
Style Comparison
Claude Opus 4.1 uses 4.6x more sentence length
