DeepSeek V4.1 Flash
DeepSeek V4.1 Flash is developed by DeepSeek, released 2026-09-10.
Model ID: deepseek-v4.1-flash
Input price
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Output price
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Blended price
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Epoch Capabilities Index (ECI)
156.5
71st percentile of 107 models with an Epoch Capabilities Index (ECI) score
Epoch AI · as of 2026-09-09
Epoch Mock AIME accuracy
98.3%
Epoch AI · as of 2026-09-09
Epoch FrontierMath (T1–3) accuracy
67.4%
Epoch AI · as of 2026-09-09
Arena text rating
No public data yet
Arena coding rating (human preference votes, not task accuracy)
No public data yet
Arena math rating
No public data yet
Arena WebDev rating
No public data yet
LiveBench
Shown here only — LiveBench scores never appear in any list, table, chart, search result or JSON-LD elsewhere on this site (see data sources).
| LiveBench metric | Value | As of |
|---|---|---|
| LiveBench Global Average | 81.1 | 2026-06-25 |
| LiveBench Reasoning | 86.7 | 2026-06-25 |
| LiveBench Coding | 80.0 | 2026-06-25 |
| LiveBench Agentic Coding | 77.3 | 2026-06-25 |
| LiveBench Mathematics | 93.3 | 2026-06-25 |
| LiveBench Data Analysis | 79.3 | 2026-06-25 |
| LiveBench Language | 81.2 | 2026-06-25 |
| LiveBench Instruction Following | 70.0 | 2026-06-25 |
LiveBench leaderboard (livebench.ai, github.com/LiveBench/new-livebench), release 2026-06-25, CC BY-SA 4.0 — livebench.ai · github.com/LiveBench/new-livebench
No API price is published for this model in our data sources (models.dev,
LiteLLM), so we show — rather than guess. It may be unreleased via API, open-weights
only, or simply not tracked yet.
See all of DeepSeek's models on its provider page, or browse the full model directory. Full source licenses and sync dates: /data-sources/.