MapikaJared PalmerDecision matchup
Decider 4Bvs.Kev 9B
Which model makes better decisions?
Decider 4B and Kev 9B each lead in different tests.
Independent testsJev Decision Index
Decider 4B0 of 1
Kev 9B0 of 1
Popularityout of 100
Decider 4B43
Kev 9B40
Weights and access
Decider 4Bopen, local
Kev 9Bopen, local
SizeParameters
Decider 4B4 B
Kev 9Bn/a
Pick Decider 4B for
No clear edge
Pick Kev 9B for
No clear edge
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
depends on the subtestKev 9B is clearly ahead in 8 of 37 subtests and slightly in 6, Decider 4B in 6 clearly and slightly in 4. 13 are level.
BPoMP · Decision Index 0.4.1
Decider 4B83.4
Kev 9B58.9
5,000 tasks, as of October 28, 2026
GSM8K · Decision Index 0.4.1
Decider 4B40.6
Kev 9B54.4
2,638 tasks, as of October 28, 2026
CRUXEval · Decision Index 0.4.1
Decider 4B43.7
Kev 9B55.4
570 tasks, as of October 28, 2026
Show all 37 subtests
| Subtest | Decider 4B | Kev 9B | Verdict |
|---|---|---|---|
| BPoMP · Decision Index 0.4.1 | 83.4 | 58.9 | Decider 4B ahead |
| GSM8K · Decision Index 0.4.1 | 40.6 | 54.4 | Kev 9B ahead |
| CRUXEval · Decision Index 0.4.1 | 43.7 | 55.4 | Kev 9B ahead |
| When2Call · Decision Index 0.4.1 | 75.9 | 60.7 | Decider 4B ahead |
| ChessBench · Decision Index 0.4.1 | 10.5 | 12.0 | Kev 9B ahead |
| cfcolor · Decision Index 0.4.1 | 60.5 | 53.0 | Decider 4B ahead |
| HellaSwag · Decision Index 0.4.1 | 94.0 | 82.7 | Decider 4B ahead |
| New Yorker · Decision Index 0.4.1 | 62.9 | 56.6 | Decider 4B ahead |
| MMLU-Pro · Decision Index 0.4.1 | 51.7 | 56.5 | Kev 9B ahead |
| BBH · Decision Index 0.4.1 | 60.9 | 66.3 | Kev 9B ahead |
| BFCL · Decision Index 0.4.1 | 88.0 | 95.2 | Kev 9B ahead |
| HoVer · Decision Index 0.4.1 | 56.3 | 60.7 | Kev 9B ahead |
| WinoGrande · Decision Index 0.4.1 | 80.7 | 75.1 | Decider 4B ahead |
| PhishNChips · Decision Index 0.4.1 | 57.8 | 61.6 | Kev 9B ahead |
| RAGTruth · Decision Index 0.4.1 | 52.2 | 70.6 | Kev 9B slightly ahead |
| BRIGHT · Decision Index 0.4.1 | 45.5 | 38.2 | Decider 4B slightly ahead |
| Amazon ESCI · Decision Index 0.4.1 | 42.4 | 49.1 | Kev 9B slightly ahead |
| ACOS · Decision Index 0.4.1 | 19.2 | 17.0 | Decider 4B slightly ahead |
| CLINC150 · Decision Index 0.4.1 | 86.6 | 77.1 | Decider 4B slightly ahead |
| BANKING77 · Decision Index 0.4.1 | 74.7 | 83.3 | Kev 9B slightly ahead |
| ContractNLI · Decision Index 0.4.1 | 72.3 | 65.3 | Decider 4B slightly ahead |
| VAST · Decision Index 0.4.1 | 53.5 | 56.7 | Kev 9B slightly ahead |
| FinEntity · Decision Index 0.4.1 | 86.0 | 89.7 | Kev 9B slightly ahead |
| ANLI · Decision Index 0.4.1 | 56.4 | 58.1 | Kev 9B slightly ahead |
| Home appliances · Decision Index 0.4.1 | 17.1 | 11.4 | level |
| GPQA Diamond · Decision Index 0.4.1 | 41.3 | 37.8 | level |
| API-Bank · Decision Index 0.4.1 | 60.4 | 65.4 | level |
| HLE · Decision Index 0.4.1 | 10.4 | 11.0 | level |
| MuSR · Decision Index 0.4.1 | 53.7 | 56.5 | level |
| Humicroedit · Decision Index 0.4.1 | 59.7 | 57.3 | level |
| SATA-Bench · Decision Index 0.4.1 | 31.6 | 30.7 | level |
| iSarcasmEval · Decision Index 0.4.1 | 42.1 | 43.2 | level |
| NLI4CT · Decision Index 0.4.1 | 73.7 | 75.2 | level |
| ToolRet · Decision Index 0.4.1 | 65.0 | 63.8 | level |
| POP909 · Decision Index 0.4.1 | 10.0 | 10.2 | level |
| Habermas · Decision Index 0.4.1 | 40.6 | 40.0 | level |
| CLadder · Decision Index 0.4.1 | 63.3 | 63.5 | level |
Source · latest October 28, 2026
All data side by side
| Decider 4B | Kev 9B | |
|---|---|---|
| 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 | 4 B | n/a |
| License | Apache-2.0 | Apache-2.0 for the adapter and head |
| Popularity (out of 100) | 43 | 40 |