DeepSeek V4.1 Models by DeepSeek
1 model2026Up to 1m ctxFrom $0.15/1M input
Last refreshed 2026-09-10. Next refresh: weekly.
Details
ResearcherDeepSeek
LicenseMITOSI-approved
Commercial useCommercial use: permitted
Models1
Released2026
Max context1m
Capabilities
VisionAll models
MultimodalAll models
ReasoningAll models
JSON / Tool useAll models
Structured OutputsAll models
About
DeepSeek V4.1 is the September 2026 DeepSeek release built on a 552B-parameter mixture-of-experts architecture with Compressed Expert Dispatch (CED). The family launches with DeepSeek V4.1 Flash, an open-weights multimodal model with 1M-token context, vision input, reasoning, and tool use. Direct DeepSeek API off-peak pricing starts at $0.15 / $0.60 per million input / output tokens.
Decision facts
- Best fit
- vision and multimodal workreasoningJSON / Tool use
- Capability starting point
- DeepSeek V4.1 Flash with 1m context and reasoning, JSON / Tool use, structured outputs, and multimodal inputs
- Lowest tracked input
- DeepSeek V4.1 Flash · $0.15/1M · DeepSeek Platform
- Closest related family
- Janus
Current Variants
Use-when guidance is based on each model's tracked capabilities, context window, release date, and replacement status.
1 in view
DeepSeek V4.1 FlashCurrent
Use when the workload needs 1m context, 552B parameters, and reasoning.
2026-091m context552B parametersreasoning
| Model | Use when | Released | Signals | Status |
|---|---|---|---|---|
| DeepSeek V4.1 Flash | Use when the workload needs 1m context, 552B parameters, and reasoning. | 2026-09 | 1m context552B parametersreasoning | Current |
Release Timeline
1 release group2026-09
1 current
DeepSeek V4.1 Flash
Current1m context552B parametersreasoning
Specifications(1 models)
| Model | Released | Context | Parameters | Vision | Multimodal | Reasoning | JSON / Tool use | Structured Outputs |
|---|---|---|---|---|---|---|---|---|
| DeepSeek V4.1 Flash | 2026-09 | 1m | 552B | Yes | Yes | Yes | Yes | Yes |
Available From(2 providers)
Pricing
| Model | Provider | Input / 1M | Output / 1M | Type |
|---|---|---|---|---|
| DeepSeek V4.1 Flash | DeepSeek Platform | $0.15 | $0.6 | Serverless |
| DeepSeek V4.1 Flash | OpenRouter | $0.15 | $0.6 | Serverless |
