Claude Sonnet 4.5 Environmental Impact
Optimised for agents, coding, and computer use
- Architecture
- Dense Transformer (decoder-only)
- Context
- 200,000 tokens
- Provider
- Anthropic
Energy per query
2.6 Wh
9x more than a Google search (0.3 Wh)
CO2 per query
0.91 g
US East (Virginia) grid (450 gCO₂/kWh)
Water per query
5 mL
~204 queries to fill 1 litre
Processing location
AWS / GCP
Provider
Anthropic
Category
Text / Chat
Grid carbon intensity
450 g CO2/kWh (25% renewable)
How does Claude Sonnet 4.5 compare?
Detailed Breakdown
Energy Consumption
Claude Sonnet 4.5 was designed for agentic workloads and coding, consuming approximately 2.6 Wh per query. It represents a refinement of the Sonnet 4 architecture with improved efficiency for multi-step tool-use tasks.
Power Source & Carbon
Runs on AWS and Google Cloud infrastructure. Anthropic has not published detailed environmental reports.
Water Usage
At ~4.9 mL per query, comparable to its predecessor Claude Sonnet 4.
About Claude Sonnet 4.5
Claude Sonnet 4.5 is a text and chat model from Anthropic, released in September 30, 2025. Optimised for agents, coding, and computer use. Each query uses 2.6 Wh of energy and produces 0.91 g of CO₂. That's 9x the energy of a Google search — reflecting the computational demands of text and chat.
These figures are estimates derived from hardware specifications and API benchmarks — Anthropic has not published official energy data for Claude Sonnet 4.5. Actual consumption may vary significantly depending on batching, quantisation, and infrastructure optimisations that we cannot observe from outside.
Claude Sonnet 4.5 in Context
At global scale
With an estimated 10M+ daily users averaging 10 queries each, Claude Sonnet 4.5 consumes roughly 260 MWh of electricity per day — enough to power 8667 homes.
Your yearly Claude Sonnet 4.5 footprint
At 25 queries per day, your annual Claude Sonnet 4.5 usage consumes 23.7 kWh — roughly what a fridge uses in a month. That produces 8.3 kg of CO₂.
Anthropic Claude Family
How energy efficiency has evolved across versions.
What does your Claude Sonnet 4.5 usage cost the planet?
Use our calculator to estimate your personal environmental footprint based on how often you use Claude Sonnet 4.5.
Calculate My ComputeFrequently Asked Questions
How much energy does Claude Sonnet 4.5 use per query?
Each Claude Sonnet 4.5 query consumes approximately 2.6 Wh of energy. This is 9x more than a traditional Google search (~0.3 Wh).
What is Claude Sonnet 4.5's carbon footprint?
Based on the carbon intensity of AWS / GCP, each query produces approximately 0.91 g of CO2. The grid in this region has a carbon intensity of 450 g CO2/kWh with 25% renewable energy.
How much water does Claude Sonnet 4.5 use?
Each query consumes approximately 5 mL of water, primarily used for cooling the data centers that process the request.
How does Claude Sonnet 4.5 compare to a Google search?
A Claude Sonnet 4.5 query uses 9x more than a Google search in terms of energy. A Google search uses approximately 0.3 Wh, while Claude Sonnet 4.5 uses 2.6 Wh.
Technical Details
Architecture
Dense Transformer (decoder-only)
Context window
200,000 tokens
Release date
2025-09-30
Open source
No
Training data cutoff
2025-08