OpenAI Codex Mini vs Inception: Mercury

Compare OpenAI Codex Mini by OpenAI against Inception: Mercury by Inception, context windows of 200K vs 32K, tested across 10 shared challenges. Updated April 2026.

Which is better, OpenAI Codex Mini or Inception: Mercury?

OpenAI Codex Mini and Inception: Mercury are both competitive models. OpenAI Codex Mini costs $1.5/M input tokens vs $10/M for Inception: Mercury. Context windows: 200K vs 32K tokens. Compare their real outputs side by side below.

Key Differences Between OpenAI Codex Mini and Inception: Mercury

OpenAI Codex Mini is made by openai while Inception: Mercury is from inception. OpenAI Codex Mini has a 200K token context window compared to Inception: Mercury's 32K. On pricing, OpenAI Codex Mini costs $1.5/M input tokens vs $10/M for Inception: Mercury.

Our Verdict
OpenAI Codex Mini
OpenAI Codex Mini
Inception: Mercury
Inception: Mercury

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call
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OpenAI Codex MiniInception: Mercury

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
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