What DeepSeek V4.1 Flash is
DeepSeek V4.1 Flash is a DeepSeek model that went live on OpenRouter on September 10, 2026. It follows DeepSeek V4 Flash 0731. Per standard answer it costs 3.2 times more, $0.0009 against $0.0003, and its context window is 1M tokens against 1M.
| Released | September 10, 2026 |
| Provider | DeepSeek |
| Context window | 1M tokens |
| Input, per million tokens | $0.3 |
| Output, per million tokens | $1.2 |
| Credits per message in Whizi | 1 |
| Minimum Whizi plan | Pro |
How to try DeepSeek V4.1 Flash in Whizi
Whizi puts DeepSeek V4.1 Flash in the same model picker as ChatGPT, Claude and Gemini, so there is no separate DeepSeek account or API key to set up. Pick a plan on the pricing page, open a new chat, choose DeepSeek V4.1 Flash in the model picker and send your first message.
Each message costs 1 credit, whatever its length. If a question turns out to suit another model better, switch in the same conversation and the thread carries across. See switching models mid-conversation.
What DeepSeek V4.1 Flash costs
List rates are what the provider charges per token. The cost of one standard answer is the more useful number, because it prices the same unit of work across every model regardless of how each one is billed.
| Input, per million tokens | $0.3 |
| Output, per million tokens | $1.2 |
| One standard answer | $0.0009 |
| One thousand answers | $0.9000 |
| Context window | 1M tokens |
| Credits per message in Whizi | 1 |
| Minimum Whizi plan | Pro |
| Rank by cost, of 113 priced models | 40 |
Prices are the published DeepSeek rates as carried by OpenRouter, last refreshed 2026-09-26. The full dataset covering all 124 models from 33 providers is the AI model cost index, which is free to reuse with attribution.
What it costs inside Whizi
Whizi meters messages in credits rather than tokens, and DeepSeek V4.1 Flash is charged at 1 credit per message. The cost does not change with the length of your message or the length of the answer, so a one line question and a long document analysis cost the same.
| Plan | Price per month | Monthly credits | Messages on this model |
|---|---|---|---|
| Pro | $29.99, or $19.99 billed yearly | 2,000 | 2,000 |
| Powerhouse | $49.99, or $34.99 billed yearly | 8,000 | 8,000 |
DeepSeek V4.1 Flash is included from the Pro plan up. Pro is a curated tier rather than everything cheap: one or two current flagships per model family, each fast tier, and the high volume workhorses. See plans and limits.
- Input $0.3 and output $1.2 per million tokens
- $0.0009 for one standard answer, $0.9000 for a thousand
- 1M token context window
- 1 credit per message inside Whizi
- Requires the Pro plan or above
- Ranks 40 of 113 priced models by cost per answer
Frequently asked questions
What is DeepSeek V4.1 Flash?
DeepSeek V4.1 Flash is a DeepSeek model released on September 10, 2026, with a 1M token context window. It follows DeepSeek V4 Flash 0731. Per standard answer it costs 3.2 times more, $0.0009 against $0.0003, and its context window is 1M tokens against 1M.
How do I use DeepSeek V4.1 Flash?
Sign up for Whizi, open a new chat and choose DeepSeek V4.1 Flash in the model picker. It is available on the Pro plan and above at 1 credit per message, with no DeepSeek account or API key needed.
How much does DeepSeek V4.1 Flash cost?
$0.3 per million input tokens and $1.2 per million output tokens at list rates, which works out to $0.0009 for one standard answer of 1,000 tokens in and 500 out, or $0.9000 for a thousand of them. Inside Whizi it is 1 credit per message on a monthly allowance, rather than metered per token.
Which Whizi plan includes DeepSeek V4.1 Flash?
Pro and above, which is $29.99 per month or $19.99 billed yearly. At 1 credits per message, a Pro allowance of 2,000 credits covers 2,000 messages on this model if you spend the whole allowance here, and most people mix in a 1 credit model for routine work so it goes further.