GPT-5.2 Pro vs Claude Opus 4
Compare GPT-5.2 Pro by OpenAI against Claude Opus 4 by Anthropic, context windows of 400K vs 200K, tested across 31 shared challenges. Updated April 2026.
Which is better, GPT-5.2 Pro or Claude Opus 4?
GPT-5.2 Pro and Claude Opus 4 are both competitive models. GPT-5.2 Pro costs $21/M input tokens vs $15/M for Claude Opus 4. Context windows: 400K vs 200K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-5.2 Pro and Claude Opus 4
GPT-5.2 Pro is made by openai while Claude Opus 4 is from anthropic. GPT-5.2 Pro has a 400K token context window compared to Claude Opus 4's 200K. On pricing, GPT-5.2 Pro costs $21/M input tokens vs $15/M for Claude Opus 4.
No community votes yet. On paper, GPT-5.2 Pro has the edge — newer, bigger context window.
Style Comparison
Claude Opus 4 uses 11.2x 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.
