GPT-5.1-Codex-Mini vs Nova Premier 1.0
Compare GPT-5.1-Codex-Mini by OpenAI against Nova Premier 1.0 by Amazon, context windows of 400K vs 1.0M, tested across 51 shared challenges. Updated April 2026.
Which is better, GPT-5.1-Codex-Mini or Nova Premier 1.0?
GPT-5.1-Codex-Mini and Nova Premier 1.0 are both competitive models. GPT-5.1-Codex-Mini costs $1.5/M input tokens vs $2.5/M for Nova Premier 1.0. Context windows: 400K vs 1000K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-5.1-Codex-Mini and Nova Premier 1.0
GPT-5.1-Codex-Mini is made by openai while Nova Premier 1.0 is from amazon. GPT-5.1-Codex-Mini has a 400K token context window compared to Nova Premier 1.0's 1000K. On pricing, GPT-5.1-Codex-Mini costs $1.5/M input tokens vs $2.5/M for Nova Premier 1.0.
No community votes yet. On paper, GPT-5.1-Codex-Mini has the edge — bigger model tier, major provider backing.
Style Comparison
Nova Premier 1.0 uses 7.1x more headings
vs
Ask 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.
