OpenAI Codex Mini vs MoonshotAI: Kimi K2 0905

Compare OpenAI Codex Mini by OpenAI against MoonshotAI: Kimi K2 0905 by Moonshot AI, context windows of 200K vs 262K, tested across 10 shared challenges. Updated April 2026.

Which is better, OpenAI Codex Mini or MoonshotAI: Kimi K2 0905?

OpenAI Codex Mini and MoonshotAI: Kimi K2 0905 are both competitive models. OpenAI Codex Mini costs $1.5/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 OpenAI Codex Mini and MoonshotAI: Kimi K2 0905

OpenAI Codex Mini is made by openai while MoonshotAI: Kimi K2 0905 is from moonshotai. OpenAI Codex Mini has a 200K token context window compared to MoonshotAI: Kimi K2 0905's 262K. On pricing, OpenAI Codex Mini costs $1.5/M input tokens vs $0.6/M for MoonshotAI: Kimi K2 0905.

Our Verdict
MoonshotAI: Kimi K2 0905
MoonshotAI: Kimi K2 0905
OpenAI Codex Mini
OpenAI Codex MiniRunner-up

No community votes yet. On paper, MoonshotAI: Kimi K2 0905 has the edge — bigger model tier, newer.

Too close to call
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OpenAI Codex MiniMoonshotAI: Kimi K2 0905

279 AI models invented the same fake scientist.

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