DeepSeek route
deepseek-v4.1-flash
DeepSeek V4.1 Flash API access.
DeepSeek's 552B mixture-of-experts Flash model with native vision and a 1M-token context. DeepSeek charges $0.15 / $0.60 per 1M off-peak and double that at peak; RouterPlex bills one flat $0.18 / $0.73 at all hours, the time-weighted average of the two. See the DeepSeek V4.1 Flash API pricing notes.
Input / 1M tokens
$0.18
Output / 1M tokens
$0.73
Cached input / 1M tokens
$0.065
Context window
1M
Provider
DeepSeek
Workload calculator
Put the token rate into context.
These examples apply the published input and output rates directly. Actual cost follows the exact tokens your client sends and the model returns.
This route is the 10th cheapest of 69 comparable text models and cheaper than 58 on the same key. Its context window ranks 36th of 69.
Short request
$0.0025
10K input + 1K output
Agent turn
$0.025
100K input + 10K output
Exact token billing
No request minimum
One model ID change
OpenAI compatible
Cost neighbourhood
Nearby routes, same workload.
Every comparison uses the same 100K-input / 10K-output turn. Changing route is a one-line model ID edit.
Price does not measure task quality. For generation routes, see GPT Image 2.
First request
Route it in one call.
Use any OpenAI SDK or tool. Keep the request shape, point the base URL at RouterPlex, and set the model ID shown here.
Read the quickstartcurl https://api.routerplex.com/v1/chat/completions \-H "Authorization: Bearer $ROUTERPLEX_API_KEY" \-H "Content-Type: application/json" \-d '{"model": "deepseek-v4.1-flash","messages": [{"role": "user", "content": "Hello!"}]}'
Route notes
Questions before production traffic.
01How much does the DeepSeek V4.1 Flash API cost?+
Through RouterPlex, DeepSeek V4.1 Flash costs $0.18 per 1M input tokens and $0.73 per 1M output tokens — the vendor list price with 0% markup, billed per token from a prepaid balance you top up from $5. Cached input tokens are billed at $0.065 per 1M instead of the full input rate, which is most of the prompt on a repeated agent or coding loop. DeepSeek prices this model by time of day: $0.15 input / $0.60 output per 1M tokens off-peak, and double that during peak hours (01:00-04:00 and 06:00-10:00 UTC, Monday to Friday). RouterPlex bills a single flat rate in between -- the time-weighted average of the two -- so you are never billed by the clock and never pay the peak rate for off-peak work.
02What does one DeepSeek V4.1 Flash agent turn cost?+
A 100K-token input with a 10K-token reply costs about $0.025 on DeepSeek V4.1 Flash. That makes it the 10th cheapest of 69 comparable text models on RouterPlex, roughly 2.1× the cost of the cheapest option (Muse Spark 1.2 Contributor).
03What is a cheaper alternative to DeepSeek V4.1 Flash?+
MiniMax M3.1 Flash from MiniMax is the closest cheaper model on RouterPlex — $0.021 per agent turn against $0.025 for DeepSeek V4.1 Flash, at $0.15/1M input and $0.60/1M output. Both run on the same key and the same endpoint, so switching is a one-line model ID change.
04Is DeepSeek V4.1 Flash cheaper than Hy3?+
Yes. Per agent turn, DeepSeek V4.1 Flash costs about $0.025 against $0.028 for Hy3 — 10% less.
05What is the context window of DeepSeek V4.1 Flash?+
DeepSeek V4.1 Flash supports a 1M token context window on RouterPlex, the 36th largest of the 69 models that publish one.
06Can I use DeepSeek V4.1 Flash with the OpenAI SDK?+
Yes. RouterPlex serves DeepSeek V4.1 Flash through an OpenAI-compatible endpoint at https://api.routerplex.com/v1 — point any OpenAI SDK or tool at that base URL with your RouterPlex key and set model to "deepseek-v4.1-flash".
Provider family
More from DeepSeek.
Deploy this route
Put DeepSeek V4.1 Flash behind one key.
Top up from $5 with no subscription required.