Claude Sonnet 4 vs GPT-5.1-Codex-Mini
Compare Claude Sonnet 4 by Anthropic against GPT-5.1-Codex-Mini by OpenAI, context windows of 200K vs 400K, tested across 54 shared challenges. Updated April 2026.
Which is better, Claude Sonnet 4 or GPT-5.1-Codex-Mini?
Claude Sonnet 4 and GPT-5.1-Codex-Mini are both competitive models. Claude Sonnet 4 costs $3/M input tokens vs $1.5/M for GPT-5.1-Codex-Mini. Context windows: 200K vs 400K tokens. Compare their real outputs side by side below.
Key Differences Between Claude Sonnet 4 and GPT-5.1-Codex-Mini
Claude Sonnet 4 is made by anthropic while GPT-5.1-Codex-Mini is from openai. Claude Sonnet 4 has a 200K token context window compared to GPT-5.1-Codex-Mini's 400K. On pricing, Claude Sonnet 4 costs $3/M input tokens vs $1.5/M for GPT-5.1-Codex-Mini.
No community votes yet. On paper, GPT-5.1-Codex-Mini has the edge — bigger model tier, newer, bigger context window.
Style Comparison
Claude Sonnet 4 uses 87.9x more emoji
vsAsk them anything yourself
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.
