GPT-4.5 vs Nova Premier 1.0
Compare GPT-4.5 by OpenAI against Nova Premier 1.0 by Amazon, context windows of 128K vs 1.0M, tested across 23 shared challenges. Updated April 2026.
Which is better, GPT-4.5 or Nova Premier 1.0?
GPT-4.5 and Nova Premier 1.0 are both competitive models. GPT-4.5 costs $75/M input tokens vs $2.5/M for Nova Premier 1.0. Context windows: 128K vs 1000K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-4.5 and Nova Premier 1.0
GPT-4.5 is made by openai while Nova Premier 1.0 is from amazon. GPT-4.5 has a 128K token context window compared to Nova Premier 1.0's 1000K. On pricing, GPT-4.5 costs $75/M input tokens vs $2.5/M for Nova Premier 1.0.
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Nova Premier 1.0 is 12x cheaper per token — worth considering if cost matters.
Style Comparison
GPT-4.5 uses 2.5x more transitions
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.
