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Jamba 1.5 Large

Highest-quality Jamba with 256K context and Mamba-Transformer hybrid architecture.

Creator
AI21 Labs
Lifecycle
Active
Context
256.0K
Max output
4.1K
Released
Sep 9, 2024
Status
unknown
Input
$2.00 / 1M tokens
Output
$8.00 / 1M tokens
Cached read
— / 1M tokens
Cached write
— / 1M tokens
Batch discount
—%
Source
Jamba 1.5 Large pricing
Verified
Apr 5, 2026 (High)

Capabilities

Modalities
text→text
Capabilities
batchSupportfunctionCallingstructuredOutputs
Strengths
256K context at competitive price, Hybrid SSM architecture
Tradeoffs
No vision, text-only
Official Links
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/

Benchmark Coverage

BenchmarkVersionScoreDateSourceNotes
MMLU202481.2 %Sep 1, 2024AI21 LabsVendor-reported

Release History

ReleaseAliasLifecycleRelease DateDeprecationShutdownSummary
Jamba 1.5 Largejamba-1-5-largeActiveSep 9, 2024——Current published model family snapshot.

Host Coverage

HostTypeContextPricing NoteDifferences
AI21 APIfirst-party256.0K$2/$8 per MTok.—
Migration Guidance

Best choice for long-document tasks without paying Gemini 2.5 prices.

Change Events
DateTypeTitleDescriptionSource
Sep 9, 2024family_addedJamba 1.5 Large publishedInitial public model family launch.Jamba 1.5 Large release notes

Other models from AI21 Labs

Jamba 1.5 Mini