GPT-3.5 Turbo vs GPT-5.4 Pro
Compare GPT-3.5 Turbo and GPT-5.4 Pro, both from OpenAI, context windows of 16K vs 1.1M, tested across 18 shared challenges. Updated April 2026.
Which is better, GPT-3.5 Turbo or GPT-5.4 Pro?
GPT-3.5 Turbo and GPT-5.4 Pro are both competitive models. GPT-3.5 Turbo costs $1.5/M input tokens vs $30/M for GPT-5.4 Pro. Context windows: 16K vs 1050K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-3.5 Turbo and GPT-5.4 Pro
GPT-3.5 Turbo is made by openai while GPT-5.4 Pro is from openai. GPT-3.5 Turbo has a 16K token context window compared to GPT-5.4 Pro's 1050K. On pricing, GPT-3.5 Turbo costs $1.5/M input tokens vs $30/M for GPT-5.4 Pro.
No community votes yet. On paper, GPT-5.4 Pro has the edge — bigger model tier, newer, bigger context window.
GPT-3.5 Turbo is 90x cheaper per token — worth considering if cost matters.
Style Comparison
GPT-5.4 Pro uses 745.3x more bold
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.
