Jamba 1.5 Large

Jamba Large model with 256K context and Mamba-Transformer hybrid architecture.

Pricing

Model Overview

Tracked token-pricing fields for this model family. Empty pricing fields stay hidden until the source publishes them.

Surface

Input and output modalities, enabled feature flags, strengths, and tradeoffs.

Model capabilities
Attribute	Values
Modalities	text to text
Capabilities	batchSupportfunctionCallingstructuredOutputs
Strengths	256K context at competitive price, Hybrid SSM architecture
Tradeoffs	No vision, text-only

References

Canonical launch, documentation, pricing, and release-note URLs.

Official model links
Reference	URL
Intro	https://www.ai21.com/blog/announcing-jamba-1-5
Docs	https://docs.ai21.com/docs/jamba-models
Pricing	https://www.ai21.com/jamba
Release note	https://docs.ai21.com/changelog/

Coverage

Reported benchmark families, versions, scores, sources, and notes.

Benchmark coverage
Benchmark	Version	Score	Date	Source	Notes
MMLU	2024	81.2 %	Sep 1, 2024	AI21 Labs	Vendor-reported

Lifecycle

Lifecycle transitions and release timeline for this model family.

Release history
Release	Alias	Lifecycle	Release Date	Deprecation	Shutdown	Summary
Jamba 1.5 Large	jamba-1-5-large	Active	Sep 9, 2024	—	—	Current published model family snapshot.

Surfaces

Provider-specific hosting, context, pricing notes, feature differences, and provider-status context.

Host coverage
Host	Type	Context	Pricing Note	Differences
AI21 API	first-party	256.0K	$2/$8 per MTok.	—

Migration

Documented migration summary, successor families, and known breaking changes.

Migration guidance
Topic	Details
Summary	Long-document option without paying Gemini 2.5 prices.

Timeline

Cataloged model-family updates and source references.

Change events
Date	Type	Title	Description	Source
Sep 9, 2024	family_added	Jamba 1.5 Large published	Initial public model family launch.	Jamba 1.5 Large release notes

From AI21 Labs