Granite 4.0
Hybrid Mamba-2/transformer open models that slash long-context memory use.
About
Granite 4.0 is IBM's family of open-weight hybrid models mixing Mamba-2 state-space layers with transformer attention in a 9:1 ratio, all under Apache 2.0. The lineup spans from the 32B-total H-Small (9B active) down to 3B dense models, and IBM claims over 70% lower memory needs for long-context, multi-session inference versus pure transformers.
IBM also touts ISO 42001 certification and cryptographically signed checkpoints — enterprise trust signals few open models offer. The memory claims are IBM's own; independent long-context benchmarks are the thing to check before committing.
Specs
Context window
Pricing
Free quota
API access
Weights
Released
Benchmarks
Provider-reported unless a source says otherwise. Benchmarks are marketing-adjacent by nature — treat them as directional.
Use cases
Trust score — 8/10
Scored 8/10 (verified tier, metrics-v1). Evidence: Major IBM release with wide coverage (VentureBeat, DBTA, c-sharpcorner); 70% memory-reduction claim is IBM's own; ISO 42001 certification independently audited per IBM; Manual review: credible enterprise open family; long-context claims await independent validation. License: Apache 2.0.
How the trust score is built
Full methodology →- Adoption · stars/downloads, log-scaled vs peers
- 8.0/10
- Maintenance · recency, releases, issue load
- 8.0/10
- Openness · license + docs
- 8.0/10
- Manual review · sanity read + red-flag check
- 8.0/10
- · Major IBM release with wide coverage (VentureBeat, DBTA, c-sharpcorner)
- · 70% memory-reduction claim is IBM's own; ISO 42001 certification independently audited per IBM
- · Manual review: credible enterprise open family; long-context claims await independent validation