Gemini 1.5 Flash: cost, energy and CO₂ per token
This model has been retired, or is being retired, by its provider. The sheet stays online for reference and to quantify past usage; the current range is on the model sheets page.
What is the footprint of Gemini 1.5 Flash? Gemini 1.5 Flash emits about 407 g of CO₂e, uses 4.4 L of water and 957 Wh of electricity per million generated tokens. Per million input tokens: 68 g of CO₂e, 730 mL of water, 160 Wh. Public price: €0.26 per million generated tokens, €0.07 for input.
Factors tokenclimate-manual-2026-06, updated on , low confidence. Sources and equations in the methodology.
Key figures, per million tokens
| Energy | CO₂e | Water | Price | |
|---|---|---|---|---|
| Input tokens | 160 Wh | 68 g | 730 mL | €0.07 |
| Generated tokens | 957 Wh | 407 g | 4.4 L | €0.26 |
One million generated tokens represents about 3 km in a combustion car.
Frequently asked questions
How much CO₂e for 1 million tokens with Gemini 1.5 Flash?
About 407 g per million generated tokens and 68 g per million input tokens (factors tokenclimate-manual-2026-06 of the TokenClimate registry).
Where do these figures come from?
Factors published in TokenClimate's versioned registry, each with its citation on this page. The full equations and parameters are in the public methodology, at tokenclimate.com/en/methodology.
What is the confidence level?
Low confidence: extrapolated from another model, or estimated by a parametric tool.
How can you measure your organisation's real usage?
The TokenClimate dashboard connects to your organisation's Anthropic, OpenAI or OpenRouter admin keys (stored encrypted) and measures cost and CO₂e per team and per model. You can see it in the demo: tokenclimate.com/demo. Locally, the open source plugin claude-carbon measures a Claude Code session.
Sources and method
Energy per token
The per-token energy factor behind the figures above, published with its citation.
Infrastructure parameters
Datacenter parameters applied to this provider (the equations live in the methodology). (Elsworth et al. 2025, arXiv:2508.15734 (données Google 2024))
| PUE | 1.09 |
| Grid carbon intensity (CIF) | 0.345 kgCO₂e/kWh |
| On-site water (WUE) | 1.15 L/kWh |
| Off-site water (EWIF) | 3.13 L/kWh |
| Amortised manufacturing (embodied) | 49 gCO₂e/kWh |
Price
Public provider prices. (ai.google.dev, pricing)
Full equations and assumptions in the methodology.