GPT-5.4 vs Kimi K2.5
Compare GPT-5.4 by OpenAI against Kimi K2.5 by Moonshot AI, context windows of 1.1M vs 262K, tested across 53 shared challenges. Updated April 2026.
Which is better, GPT-5.4 or Kimi K2.5?
GPT-5.4 and Kimi K2.5 are both competitive models. GPT-5.4 costs $2.5/M input tokens vs $0.6/M for Kimi K2.5. Context windows: 1050K vs 262K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-5.4 and Kimi K2.5
GPT-5.4 is made by openai while Kimi K2.5 is from moonshotai. GPT-5.4 has a 1050K token context window compared to Kimi K2.5's 262K. On pricing, GPT-5.4 costs $2.5/M input tokens vs $0.6/M for Kimi K2.5.
No community votes yet. On paper, GPT-5.4 has the edge — bigger model tier, newer, bigger context window, major provider backing.
Kimi K2.5 is 5.0x cheaper per token — worth considering if cost matters.
Style Comparison
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.
