DeepSeek · released Oct 17, 2026
DeepSeek V4 Flash
DeepSeek retired V4 Flash on Sep 10, and its API name now points to V4.1 Flash.
NewOpen weights12 days oldThinks before answering
- Input price
- $0.15 / M
- Output price
- $0.60 / M
- Context
- 1M tokens
- Longest reply
- 393K
- Reads
- text, image
- Knows up to
- 2025-05
Where it shines
- It scores 91 on GPQA.
- It cost $0.15 in, $0.60 out per million tokens.
Where it struggles
- DeepSeek no longer serves it from its own API.
- Its SimpleQA score of 33.6 is low.
Where you can use it
- OpenRouterAPIListed as
deepseek/deepseek-v4-flash
How it scores on each job
Scores run 0 to 100 and blend every measure we have for that job. The number after the dot is its rank among the 33 models in the lineup.
The evidence
| Measure | Score | Rank in lineup | Source |
|---|---|---|---|
| Epoch Capabilities Index | 155 | #23 | Epoch AI |
| LMArena text | 1432 | #23 | LMArena |
| LMArena hard prompts | 1443 | #25 | LMArena |
| LMArena instruction following | 1421 | #25 | LMArena |
| LMArena multi-turn | 1448 | #21 | LMArena |
| LMArena creative writing | 1403 | #24 | LMArena |
| LMArena writing & language | 1410 | #24 | LMArena |
| LMArena coding | 1457 | #25 | LMArena |
| LMArena math | 1426 | #24 | LMArena |
| LMArena business & finance | 1425 | #24 | LMArena |
| LMArena legal & government | 1439 | #23 | LMArena |
| LMArena medicine | 1448 | #19 | LMArena |
| WebDev Arena | 1582 | #21 | LMArena |
| GPQA Diamond | 91% | #16 | Epoch AI |
| FrontierMath | 58% | #25 | Epoch AI |
| SimpleQA Verified | 34% | #22 | Epoch AI |
| ARC-AGI-2 | 61% | #16 | Epoch AI |
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- Context
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- Price
- $0.12 in · $0.42 out
- Context
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