DeepSeek V4.1 Flash
A versatile starting point for coding and agent workflows.
Price comparison · USD / 1M tokens
Plan prices below assume full weekly allowance use over 30 days.
| Plan | Input | Output |
|---|---|---|
| Pay as you go | $0.135Cached input $0.01 | $0.55 |
| Coding Plan Pro$29.90 / month | $0.0233 | |
| Coding Plan Max$49.90 / month | $0.0146 | |
| Coding Plan Pro Max$149 / month | $0.0124 | |
Connect this model
Coding Plan rate: 1 point / token
Use DeepSeek V4.1 Flash in a request
Set your base URL and key as described in the quickstart. Use the exact API model ID deepseek-flash, even when the display name differs.
curl "$SIAPI_BASE_URL/v1/chat/completions" \
-H "Authorization: Bearer $SIAPI_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"deepseek-flash","messages":[{"role":"user","content":"Explain a binary search in one paragraph."}],"max_tokens":256}'Capabilities and configuration
| Display name | DeepSeek V4.1 Flash |
|---|---|
| API model ID | deepseek-flash |
| Guide examples | Text, streaming and client-defined function tools |
| Reasoning choices | none, low, high, max |
| Image admission | Enabled in gateway configuration |
Off, Low, High and Max. Medium / XHigh map to High; Ultra maps to Max.
Compare a concrete token workload
For 500,000 uncached input tokens, 500,000 cached input tokens and 1 million output tokens, DeepSeek V4.1 Flash costs $0.6225 with PAYG, or uses 2M points on a Coding Plan. Cached input is already part of the 1 million total input tokens.
The same workload on GLM 5.3 Flash costs $0.54 with PAYG, or uses 2M plan points. Compare the costs with your actual input/output mix, then evaluate results on your own task.
These are cost estimates from the published rates. Plan points count toward both allowance windows. See the Billing basics or estimate your workload.