GPT-5.1 vs GPT-5.1-Codex-Mini
Compare GPT-5.1 and GPT-5.1-Codex-Mini, both from OpenAI, in 4 community votes, gpt-5.1 wins 100% of head-to-head duels, context windows of 400K vs 400K, tested across 52 shared challenges. Updated April 2026.
Which is better, GPT-5.1 or GPT-5.1-Codex-Mini?
GPT-5.1 is the better choice overall, winning 100% of 4 blind community votes on Rival. GPT-5.1 costs $1.25/M input tokens vs $1.5/M for GPT-5.1-Codex-Mini. Context windows: 400K vs 400K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-5.1 and GPT-5.1-Codex-Mini
GPT-5.1 is made by openai while GPT-5.1-Codex-Mini is from openai. GPT-5.1 has a 400K token context window compared to GPT-5.1-Codex-Mini's 400K. On pricing, GPT-5.1 costs $1.25/M input tokens vs $1.5/M for GPT-5.1-Codex-Mini. In community voting, In 4 community votes, GPT-5.1 wins 100% of head-to-head duels.
In 4 community votes, GPT-5.1 wins 100% of head-to-head duels. GPT-5.1 leads in Reasoning. Based on blind community voting from the Rival open dataset of 4+ human preference judgments for this pair.
Pick GPT-5.1. In 4 blind votes, GPT-5.1 wins 100% of the time. That's not luck.
GPT-5.1 particularly excels in Reasoning.
Style Comparison
GPT-5.1 uses 7.9x more headings
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.
