Claude 3 Haiku vs OpenAI Codex Mini
Compare Claude 3 Haiku by Anthropic against OpenAI Codex Mini by OpenAI, context windows of 200K vs 200K, tested across 10 shared challenges. Updated April 2026.
Which is better, Claude 3 Haiku or OpenAI Codex Mini?
Claude 3 Haiku and OpenAI Codex Mini are both competitive models. Claude 3 Haiku costs $0.25/M input tokens vs $1.5/M for OpenAI Codex Mini. Context windows: 200K vs 200K tokens. Compare their real outputs side by side below.
Key Differences Between Claude 3 Haiku and OpenAI Codex Mini
Claude 3 Haiku is made by anthropic while OpenAI Codex Mini is from openai. Claude 3 Haiku has a 200K token context window compared to OpenAI Codex Mini's 200K. On pricing, Claude 3 Haiku costs $0.25/M input tokens vs $1.5/M for OpenAI Codex Mini.
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Claude 3 Haiku is 4.8x cheaper per token — worth considering if cost matters.
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Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
