Model Comparison

Chronos vs TimesFM: a practical comparison

Both are strong zero-shot time series foundation models. The right choice depends on your context length requirements, latency budget, and the characteristics of your data.

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Side by sideSame request, different models

# Chronos
{"model": "amazon/chronos-bolt-base", "inputs": [...], "parameters": {"prediction_length": 14}}

# TimesFM
{"model": "google/timesfm-2.0", "inputs": [...], "parameters": {"prediction_length": 14}}

Swap the model ID. Everything else stays the same.

Chronos

Transformer-based, multiple sizes from mini to large

TimesFM

Patched-decoder, strong on long-horizon forecasts

On TSFM.ai

Both available through one API with identical request shapes

Feature comparison

Dimension	Chronos	TimesFM
Architecture	Encoder-decoder transformer (T5-based)	Patched-decoder transformer
Model sizes	Mini, Small, Base, Large	Single 200M parameter model
Context length	Up to 2048 time steps	Up to 2048 time steps
Quantile support	Native quantile generation	Point forecasts with distribution head
Pre-training data	Synthetic + real-world time series	Google Trends + public time series corpora
Typical latency	50–200ms depending on size	80–150ms

When to choose which

Choose Chronos when

You need multiple model sizes to trade off latency vs accuracy, want native probabilistic forecasts, or need the flexibility of choosing mini through large variants.

Choose TimesFM when

You want a single well-tuned model without size selection complexity, need strong long-horizon performance, or are working with data patterns similar to its training distribution.

Or compare both

Send the same series to both models through the TSFM.ai API and compare forecasts, quantiles, and latency on your own data before committing.

Try in playground

Compare on your own data

The best model comparison is the one you run on your own series. Try both in the playground.

Open playground Get API key

Chronos vs TimesFM: a practical comparison

Feature comparison

When to choose which

Choose Chronos when

Choose TimesFM when

Or compare both

Frequently Asked Questions

Related Pages

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TimesFM vs Moirai

Best time series foundation models in 2026

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