Model Comparison
GitHub Copilot vs GPT-5.3 Codex
GitHub Copilot: StandardGPT-5.3 Codex: Heavy
Side-by-side environmental impact comparison. GPT-5.3 Codex uses 3.0x more energy per query.
GPT-5.3 Codex uses 3.0x more energy than GitHub Copilot
4.5 Wh vs 1.5 Wh per query · 2.0 g vs 0.66 g CO₂ · 16 mL vs 5 mL water
GitHub Copilot
GitHub / OpenAI
Energy per query1.5 Wh
CO₂ per query0.66 g
Water per query5 mL
VS
GPT-5.3 Codex
OpenAI
Energy per query4.5 Wh
CO₂ per query2.0 g
Water per query16 mL
GitHub Copilot
ProviderGitHub / OpenAI
CategoryCode Assistant
Inference LocationAzure US (primarily East)
Confidenceestimated
Efficiency TierStandard
GPT-5.3 Codex
ProviderOpenAI
CategoryCode Assistant
Inference LocationAzure / Multi-cloud
Confidenceestimated
Efficiency TierHeavy
Frequently Asked Questions
Which uses more energy, GitHub Copilot or GPT-5.3 Codex?
GPT-5.3 Codex uses 3.0x more energy per query than GitHub Copilot. GitHub Copilot uses 1.5 Wh per query, while GPT-5.3 Codex uses 4.5 Wh.
What is the carbon footprint difference between GitHub Copilot and GPT-5.3 Codex?
GPT-5.3 Codex uses 3.0x more CO₂ per query than GitHub Copilot. GitHub Copilot emits 0.66 g of CO₂ per query compared to GPT-5.3 Codex's 2.0 g.
Which is more environmentally friendly, GitHub Copilot or GPT-5.3 Codex?
GitHub Copilot is the more environmentally friendly option, using 1.5 Wh per query compared to GPT-5.3 Codex's 4.5 Wh. That makes GPT-5.3 Codex roughly 3.0x more energy-intensive.
Calculate your footprint with these models
See how your daily usage of GitHub Copilot and GPT-5.3 Codex adds up over time. Our calculator estimates energy, carbon, and water impact.
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