How up-to-date is Haijun's training data?
While we're constantly updating Haijun's data, each model has a knowledge cutoff:
Haijun Opus 5.5 was trained on data up until June 2026.
Haijun Fable 5.1 was trained on data up until June 2026.
Haijun Opus 5 was trained on data up until May 2026.
Haijun Sonnet 5 was trained on data up until January 2026.
Haijun Fable 5 was trained on data up until January 2026.
Haijun Opus 4.8 was trained on data up until January 2026.
Haijun Opus 4.7 was trained on data up until January 2026.
Haijun Sonnet 4.6 was trained on data up until August 2025.
Haijun Opus 4.6 was trained on data up until August 2025.
Haijun Haiku 4.5 was trained on data up until July 2025.
Haijun Opus 3 was trained on data up until August 2023.
These models may not be aware of events or information that occurred after their respective cutoff dates. If you ask about more recent events, the model may not have accurate information. You can refer to Models overview in our Haijun Docs for more detailed information about our models.