# Jamba-Instruct

> AI21 called it the first production-grade model built on Mamba, and the point of the architecture was arithmetic: state-space layers interleaved with attention carried two hundred and fifty-six thousand tokens without the memory cost that number normally implies. It was the argument that the Transformer was a choice rather than the only option, and it was on sale for thirteen months.

2024-06-25 — 2025-08-01 · lived 1 year, 1 month

## The record

- Provider: AI21 Labs
- Model id: `ai21.jamba-instruct-v1:0`
- Cause of death: Superseded
- Notice given: 2025-01-31
- Context window: 256,000 tokens
- Succeeded by: [Jamba 1.5 Large](https://models.rip/jamba-1-5-large/epitaph) (this archive's reading of lineage, not the provider's migration guidance)

## Sources

- https://aws.amazon.com/about-aws/whats-new/2024/06/ai21-labs-jamba-instruct-model-amazon-bedrock/
- https://web.archive.org/web/20260220023706/https://docs.aws.amazon.com/bedrock/latest/userguide/model-lifecycle.html

## Elsewhere

- [Stand at this grave](https://models.rip/jamba-instruct)
- [The AI21 Labs plot](https://models.rip/ai21-labs)
- [The whole cemetery](https://models.rip/)