DeepSeek V4 Pro Base vs DeepSeek V4.1 Flash
At a Glance
| Compare |  DeepSeek V4 Pro BaseDeepSeek | DeepSeek V4.1 FlashDeepSeek |
|---|---|---|
| Intelligence, Cost, and Efficiency | ||
| CostLower is better · Published-token output estimate | UnrankedNot in the 44-model eligible cohort | #5 of 44$0.022 per LiveBench case |
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | Not reported | $0.15DeepSeek ↗ · Sep 10, 2026 |
| Output priceFrom · USD / 1M tokens | Not reported | $0.60Deepinfra ↗ · Sep 22, 2026 |
| Context windowMaximum documented tokens | 1,049K | 1,049K |
| Model facts checked | Aug 28, 2026View model evidence → | Sep 10, 2026View model evidence → |
Token prices are the lowest available sourced USD rates; input and output may use different providers. Cost ranking estimates output spend on LiveBench, not a full request bill. Ranking methodology →
Available Benchmarks
Side-by-Side Facts
| Field | DeepSeek-V4-Pro-Base | DeepSeek-V4.1-Flash |
|---|---|---|
| Developer | DeepSeek | DeepSeek |
| Family | Deepseek V4 Pro Base | Deepseek V4 1 |
| Model | DeepSeek-V4-Pro-Base | DeepSeek-V4.1-Flash |
| Version | DeepSeek-V4-Pro-Base | DeepSeek-V4.1-Flash |
| Lifecycle | active | active |
| Released | 2026-04-24 | 2026-09-10 |
| Knowledge cutoff | Unknown | Unknown |
| Input modalities | Text | Text, Image |
| Output modalities | Text | Text |
| Context window | 1,049K | 1,049K |
| Total parameters | 1.6T | 763.2B |
| Active parameters | Unknown | Unknown |
| License | Unknown | mit |
| Open weights | Yes | Yes |
| API available | Unknown | Yes |
| Self-hostable | Yes | Yes |
| Provider access | Unknown | DeepSeek (Standard), Deepinfra (Standard), Together Ai (Standard) |
| Capabilities | generation | agents, chat, fim, generation, reasoning, responses, structured_outputs, tools, vision |
| Architecture design | Unknown | Causal Encoder-Decoder (20 encoder + 20 decoder layers) |
| Backbone parameters | Unknown | 552000000000 parameters |
| Active parameters during decode | Unknown | 16000000000 parameters |
| Active parameters during prefill | Unknown | 8000000000 parameters |
| Pre-training corpus | Unknown | 45000000000000 tokens |
| Reasoning effort range | Unknown | 1–100 |
| Routed experts per MoE layer | Unknown | 384 experts |
| Routed experts per token | Unknown | 6 experts |
| Transformer layers | Unknown | 40 layers |
DeepSeek V4 Pro Base Capabilities
DeepSeek V4.1 Flash Capabilities
Related Comparisons
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|---|---|---|---|
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Claude Fable 5.1Anthropic | vs | DeepSeek-V4-Pro-BaseDeepSeek | cross-developer peerstext |
DeepSeek-V4-Pro-BaseDeepSeek | vs |  Gemini 3.1 ProGoogle DeepMind | cross-developer peerstext |
DeepSeek-V4-Pro-BaseDeepSeek | vs | Grok 4.6xAI | cross-developer peerstext |
DeepSeek-V4-Pro-BaseDeepSeek | vs |  Qwen3.8-MaxQwen | cross-developer peerstext |
DeepSeek-V4-Pro-BaseDeepSeek | vs |  Kimi-K3Moonshot AI | cross-developer peerstext |
 MiniMax-M3MiniMax | vs | DeepSeek-V4-Pro-BaseDeepSeek | cross-developer peerstext |
DeepSeek-V4-Pro-BaseDeepSeek | vs |  GLM-5.3Z.ai | cross-developer peerstext |
DeepSeek-V4-Pro-BaseDeepSeek | vs |  Hy4 previewTencent | cross-developer peerstext |
Seed 2.1 ProByteDance Seed | vs | DeepSeek-V4-Pro-BaseDeepSeek | cross-developer peerstext |
DeepSeek-V4-Pro-BaseDeepSeek | vs |  Mistral Large 3Mistral AI | cross-developer peerstext |
Primary Evidence
Sources and Freshness
Questions
DeepSeek V4 Pro Base vs DeepSeek V4.1 Flash FAQs
Is DeepSeek V4 Pro Base or DeepSeek V4.1 Flash better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both DeepSeek V4 Pro Base and DeepSeek V4.1 Flash, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, DeepSeek V4 Pro Base or DeepSeek V4.1 Flash?+
Only DeepSeek V4.1 Flash has a directly sourced input price: $0.15 per million tokens. Only DeepSeek V4.1 Flash has a directly sourced output price: $0.60 per million tokens.
Which has a larger context window, DeepSeek V4 Pro Base or DeepSeek V4.1 Flash?+
Neither model has a larger sourced context window in this comparison. DeepSeek V4 Pro Base is 1,049K and DeepSeek V4.1 Flash is 1,049K.
Which performs better in benchmarks, DeepSeek V4 Pro Base or DeepSeek V4.1 Flash?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can DeepSeek V4 Pro Base or DeepSeek V4.1 Flash be self-hosted?+
Both models have the same recorded self-hosting status: supported. DeepSeek V4 Pro Base is open weight; DeepSeek V4.1 Flash is open weight.
Can DeepSeek V4 Pro Base and DeepSeek V4.1 Flash understand images?+
DeepSeek V4 Pro Base is not documented with image input; DeepSeek V4.1 Flash is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, DeepSeek V4 Pro Base or DeepSeek V4.1 Flash?+
Neither has a larger sourced maximum output. DeepSeek V4 Pro Base is — and DeepSeek V4.1 Flash is 393K.
Do DeepSeek V4 Pro Base and DeepSeek V4.1 Flash support reasoning and tool use?+
DeepSeek V4 Pro Base: none of these features are definitively sourced. DeepSeek V4.1 Flash: reasoning, tool calling, and image input. Feature support does not establish relative quality.
Which is available from more inference providers, DeepSeek V4 Pro Base or DeepSeek V4.1 Flash?+
DeepSeek V4 Pro Base has 0 sourced provider routes; DeepSeek V4.1 Flash has 3, so DeepSeek V4.1 Flash has broader tracked availability.
Which offers better value, DeepSeek V4 Pro Base or DeepSeek V4.1 Flash?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.