DeepSeek V4.1 Flash (thinking default)
Data: JevBench v1.6.1, published 2026-10-06
Capability 97.4 · API offering, ranked on the API leaderboard · outside the Jev-class caps (cost 14.9× Jev (v1.5 reference); latency 3.3× Jev (v1.5 reference)), below the Capability ranking
Measured 2026-10-06 on A4 ∪ P, 600 items, equated (+2.57 I / +3.35 C); round score-a4-2.
open weights, proprietary API route
intelligence
94.7
calibration
100.0
speed
68.1
cost
19.6
Composite (secondary)
7.1 · Composite rank #22 of 27 on the API leaderboard
Cost and measurement conditions
$0.480 per 1,000 decisions (public tariff)
measured: token usage of the 6 Oct 2026 A4 u P run x tariff USD 0.15/M input, 0.6/M output (spec deepseek-flash.json), per 1,000 decisions on the v1.6.1 common cost basis (591 of 600 items; the 9 A4 u P items outside the Jev reference's accepted input range are excluded, cost-basis-a4.json)
p50 latency: 2.0 s
none (API)
Breakdowns (not part of the score)
Chance-corrected competence (0 = chance, 100 = perfect) on A4 ∪ P (600 items: 300 open + 300 sealed; fewer sealed items than the full set, so wider uncertainty). Raw values, not equated. Category cells use A4+P+L1+L2+L3; per-type/tier cells use the original basis above. Radars against Jev.
| Request type | Open | Sealed |
|---|---|---|
| choice | 99.2 | 98.4 |
| noul | 93.5 | 90.4 |
| score | 85.0 | 86.3 |
Capability by subject topic
| Rules, policy & law | 98.6 | n=1133 |
|---|---|---|
| Coding & software | 88.2 | n=202 |
| Math & numbers | 96.2 | n=269 |
| Finance & commerce | 97.9 | n=178 |
| Support & operations | 95.9 | n=109 |
| Everyday language | 98.7 | n=130 |
| Safety & security | 99.8 | n=84 |
Use cases (TypeSafe categories)
| Model routing | 91.5 | n=267 |
|---|---|---|
| Legal & compliance | 99.0 | n=269 |
| Customer support | 99.2 | n=156 |
| E-commerce | 95.5 | n=88 |
| Insurance claims | 98.9 | n=92 |
| Risk assessment | 99.9 | n=88 |
| Financial crime | 100.0 | n=76 |
| Feature extraction | 95.2 | n=90 |
| Lead generation | 97.5 | n=86 |
| Recruiting | 95.8 | n=88 |
| Knowledge graphs | 99.9 | n=82 |
| LLM guardrails | 97.9 | n=82 |
| Moderation | 100.0 | n=69 |
| Code linting | 96.7 | n=81 |
| Search & retrieval | 99.5 | n=84 |
| Science | 97.3 | n=82 |
| Advertising | 99.7 | n=85 |
| Gaming | 99.5 | n=79 |
| Demand forecasting | 100.0 | n=72 |
Cells need at least 15 answered items; † fewer than 30 (indicative only, listed below the radar in the compare view).
Previous measurement (v1.5.x, not comparable)
Capability 95.3 · composite 6.6 · cost $0.498 per 1,000 decisions (estimated)
Last measured 2026-09-28, measurement release v1.5.0. Older method and scale; the current figures above replace it.