Specification

Status: deprecated
Source:Artificial AnalysisT2observed 4 h agomedium
Openness: open-weights
Source:Artificial AnalysisT2observed 4 h agomedium
Context window: 256K tokens
Source:Artificial AnalysisT2observed 4 h agomedium

Each value shows its source, tier and observation time. Conflicting claims are kept side by side and flagged — never averaged. How AI Atlas records facts →

Provenance

Attributed facts

4

Source tiers

T24

Freshest observation

4 h ago

Conflicts

None

Modalities

Modalities unavailable.

Capabilities

Tool calling
Unavailable
Structured output
Unavailable
Reasoning
No
Artificial Analysis · T2
Vision
Unavailable
Audio
Unavailable
Fine-tuning available
Unavailable

Context window: 256K tokens
Source:Artificial AnalysisT2observed 4 h agomedium

Benchmark results
Benchmark	Score	Metric	Config	Evaluated	Source
Artificial Analysis Intelligence Index	6.01	index	aa_slug=jamba-1-5-large · version=4.3 · estimated=true	—	artificialanalysis.aiT2
GPQA	42.73%	accuracy	aa_slug=jamba-1-5-large · variant=GPQA Diamond · evaluator=Artificial Analysis · index_version=4.3	—	artificialanalysis.aiT2
Humanity's Last Exam	4.07%	accuracy	aa_slug=jamba-1-5-large · evaluator=Artificial Analysis · index_version=4.3	—	artificialanalysis.aiT2

Scores are reported as published, with their evaluation configuration (harness, prompting, judge). Results with different configs are not directly comparable — see methodology.

Current prices

No current prices recorded

Prices appear when a provider publishes a public pricing page we crawl.

Price history

No hardware estimate available

Estimates need a parameter count; this model has none recorded from a source.

No lineage recorded

Lineage comes from explicit `derived_from`, `fine_tuned_from`, `distilled_from` and `quantized_from` relations stated by sources.

Papers 0

No papers linked yet.

Repositories 0

No repositories linked yet.

As of

Rewind the record: see this entity's attributes exactly as AI Atlas knew them on a given day.

Claim history · Openness

1 claims · 1 propertiesShow all properties

Opennessopenness1

Claim history for Openness
Value	Valid from → to	Status	Source	Confidence	Extractor
open-weights	11 Sept 2026 22:42 UTC → current	current	Artificial AnalysisT2	medium	deterministic

Claims are temporal and append-only: a new observation closes the previous claim (valid_to) instead of overwriting it. Conflicting claims from different sources are kept side by side and flagged — never averaged. Methodology →

11 Sept 2026
New modelModeljamba-1-5-largeAI21 Labs
New model: jamba-1-5-large (AI21 Labs)
artificial_analysis
artificialanalysis.ai
11 Sept 2026
Benchmark resultModeljamba-1-5-largeAI21 Labs
jamba-1-5-large scores 4.07% on Humanity's Last Exam
artificial_analysis
artificialanalysis.ai
11 Sept 2026
Benchmark resultModeljamba-1-5-largeAI21 Labs
jamba-1-5-large scores 42.73% on GPQA
artificial_analysis
artificialanalysis.ai
11 Sept 2026
Benchmark resultModeljamba-1-5-largeAI21 Labs
jamba-1-5-large scores 6.01 on Artificial Analysis Intelligence Index
artificial_analysis
artificialanalysis.ai

Full timeline →

Source documents
Source	Document	Type	Tier	Last observed	Snapshots
Artificial Analysis	artificialanalysis.ai/leaderboards/models	leaderboard	T2· Quality secondary	4 h ago	1

Tier 1 = official/primary, 2 = quality secondary, 3 = community, 4 = unverified. Every snapshot is archived; see all sources and the methodology.