Mammoth Models by Baseten
Baseten releases · 2 in the last 12 months · this family litChangelog →
1 model2026Up to 16K ctx
Last refreshed 2026-10-21. Next refresh: weekly.
Details
ResearcherBaseten
LicenseMITOSI-approved
Commercial usePermitted
Models1
Released2026
Max context16K
Capabilities
Structured OutputsAll models
About
Mammoth is Base Labs' (Baseten) line of open-weight decision models. mammoth-1 (27B), the first release on 2026-10-21, is a full fine-tune of Qwen3.5-27B that returns a probability per option for choice, yes/no and score questions instead of generating text, under MIT.
Decision facts
Current Variants
Use-when guidance is based on each model's tracked capabilities, context window, release date, and replacement status.
1 in view
mammoth-1Current
Use when the workload needs 16K context, 27B parameters, and structured outputs.
2026-1016K context27B parametersstructured outputs
| Model | Use when | Released | Signals | Status |
|---|---|---|---|---|
| mammoth-1 | Use when the workload needs 16K context, 27B parameters, and structured outputs. | 2026-10 | 16K context27B parametersstructured outputs | Current |
Release Timeline
1 release group2026-10
1 current
mammoth-1
Current16K context27B parametersstructured outputs
Specifications(1 models)
| Model | Released | Context | Parameters | Structured Outputs |
|---|---|---|---|---|
| mammoth-1 | 2026-10 | 16K | 27B | Yes |