H2O-Lightning Models by H2O.ai
H2O.ai releases · 1 in the last 12 monthsChangelog →
1 model2026Up to 40K ctx
Last refreshed 2026-10-12. Next refresh: weekly.
Details
ResearcherH2O.ai
LicenseApache 2.0OSI-approved
Commercial useCommercial use: permitted
Models1
Released2026
Max context40K
Capabilities
VisionAll models
MultimodalAll models
Structured OutputsAll models
About
H2O-Lightning is H2O.ai's family of open-weight decision models. Models answer typed Choice, Noul and Score questions about a record (and, in image-capable releases, about attached images), returning a probability for each option in one forward pass without generating explanations.
Decision facts
- Best fit
- agentsvision and multimodal workstructured outputs
- Capability starting point
- H2O-Lightning-4B with 40K context and structured outputs and multimodal inputs
- Lowest tracked input
- Not tracked
- Closest related family
- Agents-A1
Current Variants
Use-when guidance is based on each model's tracked capabilities, context window, release date, and replacement status.
1 in view
H2O-Lightning-4BCurrent
Use when the workload needs 40K context, 4B parameters, and structured outputs.
2026-1040K context4B parametersstructured outputs
| Model | Use when | Released | Signals | Status |
|---|---|---|---|---|
| H2O-Lightning-4B | Use when the workload needs 40K context, 4B parameters, and structured outputs. | 2026-10 | 40K context4B parametersstructured outputs | Current |
Release Timeline
1 release group2026-10
1 current
H2O-Lightning-4B
Current40K context4B parametersstructured outputs
Specifications(1 models)
| Model | Released | Context | Parameters | Vision | Multimodal | Structured Outputs |
|---|---|---|---|---|---|---|
| H2O-Lightning-4B | 2026-10 | 40K | 4B | Yes | Yes | Yes |