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AI21 · 2024

Jamba 1.5

8.2Open hybrid (Mamba-Transformer)

CompanyAI21

Release2024

TypeOpen hybrid (Mamba-Transformer)

Context window256K tokens

Input typesText

Output typesText

ReasoningGood

CodingGood

MultimodalNo

API availableYes

PricingOpen weights / API

Overview

Jamba 1.5 is a open hybrid (mamba-transformer) model from AI21, released in 2024. It accepts text as input and produces text. With a context window of 256K tokens, it is well suited to long-context enterprise workloads and function calling.

Capabilities

On reasoning, Jamba 1.5 is rated good, while its coding ability is good. Multimodal support: No. These characteristics make it a strong fit for long-context enterprise workloads and function calling. As with any frontier system, real-world performance depends heavily on how you prompt and integrate it.

Availability & Pricing

Jamba 1.5 is accessible via an API. Pricing model: Open weights / API. Availability and pricing for AI models change frequently; confirm the latest details from AI21 before building on it.

Best Use Cases

The sweet spot for Jamba 1.5 is long-context enterprise workloads and function calling. Teams choosing a model should weigh context length, cost, latency and modality against their workload — Jamba 1.5 is a particularly good match when those priorities align with its strengths.

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