MapikaJared PalmerDecision matchup
Decider 2Bvs.Kev 4B
Which model makes better decisions?
Kev 4B does better in independent tests, while Decider 2B is more popular.
Independent testsJev Decision Index
Decider 2B0 of 1
Kev 4Bahead1 of 1
Popularityout of 100
Decider 2Bahead52
Kev 4B23
Weights and access
Decider 2Bopen, local
Kev 4Bopen, local
SizeParameters
Decider 2B1.9 B
Kev 4Bn/a
Pick Decider 2B for
more popular
Pick Kev 4B for
Jev Decision Index
Shared tests
Independent evaluators and leaderboards only, the newest shared snapshot per evaluator. With 95 % ranges a lead counts when they do not overlap; for hit rates, when it holds in a 95 % test. Without any uncertainty figure at most “slightly ahead”.
Jev Decision Index
Kev 4B aheadKev 4B is clearly ahead in 13 of 37 subtests and slightly in 8, Decider 2B in 2 clearly and slightly in 1. 13 are level.
POP909 · Decision Index 0.4.1
Decider 2B0.3
Kev 4B1.2
2,000 tasks, as of October 28, 2026
Home appliances · Decision Index 0.4.1
Decider 2B3.4
Kev 4B14.8
88 tasks, as of October 28, 2026
GSM8K · Decision Index 0.4.1
Decider 2B23.1
Kev 4B46.5
2,638 tasks, as of October 28, 2026
Show all 37 subtests
| Subtest | Decider 2B | Kev 4B | Verdict |
|---|---|---|---|
| POP909 · Decision Index 0.4.1 | 0.3 | 1.2 | Kev 4B ahead |
| Home appliances · Decision Index 0.4.1 | 3.4 | 14.8 | Kev 4B ahead |
| GSM8K · Decision Index 0.4.1 | 23.1 | 46.5 | Kev 4B ahead |
| API-Bank · Decision Index 0.4.1 | 31.7 | 53.3 | Kev 4B ahead |
| CRUXEval · Decision Index 0.4.1 | 33.0 | 48.1 | Kev 4B ahead |
| MMLU-Pro · Decision Index 0.4.1 | 37.6 | 50.7 | Kev 4B ahead |
| BBH · Decision Index 0.4.1 | 51.0 | 62.5 | Kev 4B ahead |
| When2Call · Decision Index 0.4.1 | 54.7 | 66.7 | Kev 4B ahead |
| SATA-Bench · Decision Index 0.4.1 | 24.7 | 28.8 | Kev 4B ahead |
| New Yorker · Decision Index 0.4.1 | 44.7 | 52.3 | Kev 4B ahead |
| BFCL · Decision Index 0.4.1 | 82.9 | 93.1 | Kev 4B ahead |
| PhishNChips · Decision Index 0.4.1 | 50.1 | 55.3 | Kev 4B ahead |
| CLadder · Decision Index 0.4.1 | 57.3 | 63.1 | Kev 4B ahead |
| Humicroedit · Decision Index 0.4.1 | 59.9 | 54.4 | Decider 2B ahead |
| HellaSwag · Decision Index 0.4.1 | 85.8 | 78.9 | Decider 2B ahead |
| RAGTruth · Decision Index 0.4.1 | 28.3 | 67.5 | Kev 4B slightly ahead |
| iSarcasmEval · Decision Index 0.4.1 | 22.4 | 46.8 | Kev 4B slightly ahead |
| ACOS · Decision Index 0.4.1 | 7.9 | 9.8 | Kev 4B slightly ahead |
| Amazon ESCI · Decision Index 0.4.1 | 34.7 | 39.7 | Kev 4B slightly ahead |
| FinEntity · Decision Index 0.4.1 | 76.1 | 87.1 | Kev 4B slightly ahead |
| NLI4CT · Decision Index 0.4.1 | 65.5 | 74.6 | Kev 4B slightly ahead |
| BANKING77 · Decision Index 0.4.1 | 72.8 | 82.9 | Kev 4B slightly ahead |
| BRIGHT · Decision Index 0.4.1 | 37.1 | 39.0 | Kev 4B slightly ahead |
| ToolRet · Decision Index 0.4.1 | 63.1 | 61.0 | Decider 2B slightly ahead |
| HLE · Decision Index 0.4.1 | 12.0 | 10.2 | level |
| ChessBench · Decision Index 0.4.1 | 9.9 | 8.9 | level |
| GPQA Diamond · Decision Index 0.4.1 | 36.2 | 37.8 | level |
| WinoGrande · Decision Index 0.4.1 | 67.7 | 70.2 | level |
| VAST · Decision Index 0.4.1 | 51.0 | 52.4 | level |
| ANLI · Decision Index 0.4.1 | 49.4 | 48.1 | level |
| MuSR · Decision Index 0.4.1 | 54.9 | 56.3 | level |
| CLINC150 · Decision Index 0.4.1 | 73.7 | 75.0 | level |
| cfcolor · Decision Index 0.4.1 | 57.0 | 57.9 | level |
| ContractNLI · Decision Index 0.4.1 | 63.4 | 64.4 | level |
| HoVer · Decision Index 0.4.1 | 59.1 | 59.7 | level |
| Habermas · Decision Index 0.4.1 | 42.2 | 42.0 | level |
| BPoMP · Decision Index 0.4.1 | 64.9 | 65.1 | level |
Source · latest October 28, 2026
All data side by side
| Decider 2B | Kev 4B | |
|---|---|---|
| Kind | Standalone | Adapter |
| Developer | Mapika | Jared Palmer |
| Status | Open source | Open source |
| Released | n/a | September 20, 2026 |
| Weights | open | open |
| Runs locally | yes | yes |
| Parameters | 1.9 B | n/a |
| License | Apache-2.0 | Apache-2.0 for the adapter and head |
| Popularity (out of 100) | 52 | 23 |