OpenAI: GPT-5.6 Luna vs PaLM 2 Chat
Compare OpenAI: GPT-5.6 Luna by OpenAI against PaLM 2 Chat by Google AI, context windows of 1.1M vs 8K, tested across 20 shared challenges.
Our Verdict
OpenAI: GPT-5.6 Luna
PaLM 2 Chat
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
PaLM 2 Chat is 12x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
OpenAI: GPT-5.6 Luna
Input
$1.00
Output
$6.00
PaLM 2 Chat
Input
$0.50
2.0× cheaper
Output
$0.50
12× cheaper
PaLM 2 Chat is cheaper on both — 2.0× input, 12× output
Writing DNA
Style Comparison
Similarity
58%
OpenAI: GPT-5.6 Luna uses 16.7x more headings
OpenAI: GPT-5.6 Luna
PaLM 2 Chat
59%Vocabulary63%
19wSentence Length16w
0.84Hedging0.77
2.7Bold3.4
4.5Lists1.3
0.00Emoji0.00
1.20Headings0.07
0.10Transitions0.27
Based on 27 + 9 text responses
Research
What we learned reading every model
FAQ
Common questions
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