Model Comparison
GPT-5.2 Codex vs GPT-5.3 Codex
GPT-5.2 Codex: HeavyGPT-5.3 Codex: Heavy
Side-by-side environmental impact comparison. GPT-5.3 Codex uses 13% more energy per query.
GPT-5.3 Codex uses 13% more energy than GPT-5.2 Codex
4.5 Wh vs 4.0 Wh per query · 2.0 g vs 1.7 g CO₂ · 16 mL vs 15 mL water
GPT-5.2 Codex
OpenAI
Energy per query4.0 Wh
CO₂ per query1.7 g
Water per query15 mL
VS
GPT-5.3 Codex
OpenAI
Energy per query4.5 Wh
CO₂ per query2.0 g
Water per query16 mL
GPT-5.2 Codex
ProviderOpenAI
CategoryCode Assistant
Inference LocationAzure / Multi-cloud
Confidenceestimated
Efficiency TierHeavy
GPT-5.3 Codex
ProviderOpenAI
CategoryCode Assistant
Inference LocationAzure / Multi-cloud
Confidenceestimated
Efficiency TierHeavy
Frequently Asked Questions
Which uses more energy, GPT-5.2 Codex or GPT-5.3 Codex?
GPT-5.3 Codex uses 13% more energy per query than GPT-5.2 Codex. GPT-5.2 Codex uses 4.0 Wh per query, while GPT-5.3 Codex uses 4.5 Wh.
What is the carbon footprint difference between GPT-5.2 Codex and GPT-5.3 Codex?
GPT-5.3 Codex uses 13% more CO₂ per query than GPT-5.2 Codex. GPT-5.2 Codex emits 1.7 g of CO₂ per query compared to GPT-5.3 Codex's 2.0 g.
Which is more environmentally friendly, GPT-5.2 Codex or GPT-5.3 Codex?
GPT-5.2 Codex is the more environmentally friendly option, using 4.0 Wh per query compared to GPT-5.3 Codex's 4.5 Wh. That makes GPT-5.3 Codex roughly 1.1x more energy-intensive.
Calculate your footprint with these models
See how your daily usage of GPT-5.2 Codex and GPT-5.3 Codex adds up over time. Our calculator estimates energy, carbon, and water impact.
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