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Horopter beta-3
Horopter beta-3 answers typed questions with evidence spans and abstention estimates. Its 0.4B and 1B weights have a non-commercial licence.
By Fight Fire with Fire Robotics · Beta-3 release; first release 20 Oct 2026: 4 Nov 2026
An encoder-only decision model family built on Ettin, with 0.4B and 1B sizes. It returns typed answers alongside evidence spans, a relation to the state and an abstention estimate. It encodes and caches the state before seeing questions. Beta-3 adds non-decisive rule outcomes and a field-extraction adapter; the first release was 20 Oct 2026.
Facts
- Size
- 0.4B and 1B
- Base
- Ettin encoders from jhu-clsp
- Licence
- Weights, data recipe and docs: CC BY-NC-SA 4.0; code: MIT
- Inputs
- English text or JSON state; up to 2,048 state tokens
- Access
- Public weights; Python runtime; /v1/systemone, /v1/clairic and combined /v1/horopter endpoints
- Training restriction
- Training includes TypeSafe Jev API outputs. The card says TypeSafe terms prohibit using them to imitate its model or build a competing service.
Claims and sources
- The maker reports ShARC four-way accuracy of 82.3 for the 1B beta-3 release, against 54.3 for its first release. ShARC training data is included, so the dev set is held out within the same distribution. On JevBench hard, the 1B scores 40.5 against 64.0 for clef-flash. Generated-policy results do not establish the same performance on real rule text. vendor reportedsource
Links
Source: 1B model card and weights → Source: 0.4B model card and weights → Source: Runtime and recipes →
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