GPT-5.3-Codex
Nothing here. The model returned empty. We stared at it for a while.
GPT-5.3-Codex vs Llama 4 Maverick
Compare GPT-5.3-Codex by OpenAI against Llama 4 Maverick by Meta AI, context windows of 400K vs 1.0M, tested across 53 shared challenges. Updated April 2026.
Which is better, GPT-5.3-Codex or Llama 4 Maverick?
GPT-5.3-Codex and Llama 4 Maverick are both competitive models. GPT-5.3-Codex costs $1.75/M input tokens vs $1.5/M for Llama 4 Maverick. Context windows: 400K vs 1000K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-5.3-Codex and Llama 4 Maverick
GPT-5.3-Codex is made by openai while Llama 4 Maverick is from meta. GPT-5.3-Codex has a 400K token context window compared to Llama 4 Maverick's 1000K. On pricing, GPT-5.3-Codex costs $1.75/M input tokens vs $1.5/M for Llama 4 Maverick.
Our Verdict
GPT-5.3-Codex
Llama 4 Maverick
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Llama 4 Maverick is 5.6x cheaper per token — worth considering if cost matters.
Too close to call
Writing DNA
Style Comparison
Similarity
100%
GPT-5.3-Codex uses 15.8x more emoji
GPT-5.3-Codex
Llama 4 Maverick
65%Vocabulary42%
23wSentence Length24w
0.51Hedging0.76
6.5Bold3.7
6.2Lists6.3
0.16Emoji0.00
1.90Headings0.74
0.03Transitions0.11
Based on 23 + 12 text responses
vsAsk them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
Model Similarity Index
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
Devstral M / S
95.7%
Qwen3 Coder / Flash
95.6%
GPT-5.4 / Mini
93.3%
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
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