DeepSeek V4.1 Flash API Pricing & Monthly Cost Simulator
Verified 2026 unit economics for DeepSeek DeepSeek V4.1 Flash (deepseek/deepseek-v4.1-flash): $0.3/1M uncached input, $0.006/1M cached prefix read, and $1.2/1M output across a 1,048,576-token context window (released 2026-09-10).
Uncached Input (/1M)
$0.3
Cached Prompt Read (/1M)
$0.006 (-98%)
Output Completion (/1M)
$1.2
50% Batch API (In / Out)
Real-time API only (no 50% async batch)
Interactive 30-Day Monthly Spend Simulator
Live Unit-Cost & Prompt Cache Slider (DeepSeek V4.1 Flash)
deepseek/deepseek-v4.1-flash
Estimated 30-day spend
$47.16/mo
Cost per 1,000 calls
$1.5720
Monthly savings vs 0% cache
$17.64/mo
Technical Limits & API Capabilities
Context window
1,048,576
Max output tokens
943,718
Workload tier
Coding & Agent
Input modalities
text, image
Tool Calling: Yes
JSON Schema Strict: Yes
Reasoning Tokens: Supported
Batch API: Unavailable
Same-Category 2026 Model Alternatives (Coding & Agent)
| Model | Provider | Input / Cached ($/1M) | Output ($/1M) | Context / Max Out |
|---|---|---|---|---|
| DeepSeek V4.1 Flash | DeepSeek | $0.3 / $0.006 | $1.2 | 1,048,576 / 943,718 |
| Gemini 4 Hydrogen | $1.5 / $0.075 | $7.5 | 1,048,576 / 943,718 | |
| Gemini 4 Carbon | $2 / $0.1 | $10 | 1,048,576 / 943,718 | |
| Muse Ember | Meta | $0.1 / $0.004 | $0.5 | 1,048,576 / 943,718 |
| GPT-6.1 Terra | OpenAI | $1 / $0.05 | $5 | 1,050,000 / 128,000 |
| MiniMax M3.1 Flash | MiniMax | $0.15 / $0.015 | $0.6 | 1,048,576 / 524,288 |
| Muse Spark Open | Meta | $1.25 / $0.15 | $4.25 | 1,048,576 / 943,718 |
Head-to-Head Matchups Featuring DeepSeek V4.1 Flash
- DeepSeek V4 Pro 0813 vs DeepSeek V4.1 Flash — $0.111 vs $0.3 / 1M
- DeepSeek V4.1 Flash vs GPT-6 Luna — $0.3 vs $0.1 / 1M
Frequently Asked Questions
How much does DeepSeek V4.1 Flash cost per 1 million tokens in 2026?
DeepSeek V4.1 Flash by DeepSeek is billed at $0.3 per 1M uncached input tokens, $0.006 per 1M cached input read tokens (98% cache discount), and $1.2 per 1M output tokens.
What are the context window and max output token limits for DeepSeek V4.1 Flash?
DeepSeek V4.1 Flash supports a 1,048,576-token input context window and up to 943,718 completion output tokens per request, accepting text, image inputs.
Does DeepSeek V4.1 Flash support strict JSON Schema outputs, tool calling, and Batch API?
DeepSeek V4.1 Flash capability profile: tool calling = Supported, strict JSON Schema structured outputs = Supported, reasoning mode = Supported, and 50% asynchronous Batch API = Not listed.