Chronos 2
Amazon's latest Chronos encoder-only foundation model. A 12-layer T5 encoder that predicts up to 1,024 timesteps ahead with 21 quantile levels in one shot. Handles 8,192 timesteps of context with RoPE positional encoding and arcsinh normalization for robustness to outliers and spikes.
Quick start
$routeframe pull chronos2
| Variant | Size | Pull command |
|---|---|---|
| f16 | 228 MB | routeframe pull chronos2 |
| f32 | 456 MB | routeframe pull chronos2 --variant f32 |
Architecture
- Architecture
- 12-layer T5 encoder (no decoder)
- Parameters
- 120M
- Output head
- 21-level quantile, 1,024-step horizon in one pass
- Context length
- up to 8,192 timesteps
- Positional encoding
- RoPE
- Normalization
- arcsinh instance norm
Run a forecast
$routeframe run chronos2 --input "45,48,52,49,55,58,62,59,64,67" --horizon 4
See the CLI docs for advanced usage.