Mistral Small 4: cost, energy and CO₂ per token
What is the footprint of Mistral Small 4? Mistral Small 4 emits about 24 g of CO₂e, uses 919 mL of water and 207 Wh of electricity per million generated tokens. Per million input tokens: 4 g of CO₂e, 155 mL of water, 35 Wh. Public price: €0.52 per million generated tokens, €0.13 for input.
Factors ecologits-v3-2026-06, updated on , medium confidence. Sources and equations in the methodology.
Key figures, per million tokens
| Energy | CO₂e | Water | Price | |
|---|---|---|---|---|
| Input tokens | 35 Wh | 4 g | 155 mL | €0.13 |
| Generated tokens | 207 Wh | 24 g | 919 mL | €0.52 |
Of the 26 models in the TokenClimate registry, Mistral Small 4 ranks 2nd for carbon intensity per million generated tokens, below the median (681 g). The gap with GPT-6 Luna, the registry's most frugal, is still ×1.0.
Frequently asked questions
How much CO₂e for 1 million tokens with Mistral Small 4?
About 24 g per million generated tokens and 4 g per million input tokens (factors ecologits-v3-2026-06 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?
Medium confidence: derived from a fitted model, or a partial fit completed by a convention.
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. (EcoLogits v0.10.2)
Infrastructure parameters
Datacenter parameters applied to this provider (the equations live in the methodology). (WRI 2020, water use embedded in purchased electricity)
| PUE | 1.16 |
| Grid carbon intensity (CIF) | 0.056 kgCO₂e/kWh |
| On-site water (WUE) | 0.18 L/kWh |
| Off-site water (EWIF) | 3.67 L/kWh |
| Amortised manufacturing (embodied) | 49 gCO₂e/kWh |
Price
Public provider prices. (mistral.ai/pricing)
Full equations and assumptions in the methodology.