xAI
Grok 4
Trained on the Colossus cluster.
Specs
- Provider
- xAI
- Family
- Grok
- Context window
- 256,000 tokens
- Max output
- 64,000 tokens
- Input price
- $3 / 1M
- Output price
- $15 / 1M
- Modalities
- text, image
- License
- proprietary
- Released
- Jul 9, 2025
- Training cutoff
- Feb 1, 2025
Estimated footprint
Per single text prompt (token-scaled rows assume ~1,000 tokens).
Footprint numbers are rough public estimates that vary by 10–100× across sources and depend on data-centre efficiency and local grid mix. They are shown as a low–high band with a source and date. Don't treat them as measured fact.
Energy
≈ 2.5 Wh
range 0.8–6.5 Wh
~17 s of a 9 W LED bulb
Third-party estimate (grid mix assumed carbon-intensive) · low confidence
Water
≈ 2.8 mL
range 0.9–7 mL
~0.0 s of a shower
Third-party estimate (grid mix assumed carbon-intensive) · low confidence
CO₂e
≈ 1.9 g
range 0.6–5 g
~16 m driven in a petrol car
Third-party estimate (grid mix assumed carbon-intensive) · low confidence
Metric sources
| Metric | Low–Mid–High | Basis | Confidence | As of | Source |
|---|---|---|---|---|---|
| co2 | 0.6 · 1.9 · 5 g | per prompt | low | Jul 1, 2025 | Third-party estimate (grid mix assumed carbon-intensive) |
| energy | 0.8 · 2.5 · 6.5 Wh | per prompt | low | Jul 1, 2025 | Third-party estimate (grid mix assumed carbon-intensive) |
| water | 0.9 · 2.8 · 7 mL | per prompt | low | Jul 1, 2025 | Third-party estimate (grid mix assumed carbon-intensive) |
Changelog
- Oct 6, 2026Seeded into PromptLedger reference library.