Last refreshed 2026-09-10. Next refresh: weekly.
Why use DeepSeek V4.1 Flash on OpenRouter?
OpenRouter offers DeepSeek V4.1 Flash with pay-as-you-go pricing at $0.15/1M input tokens. OpenRouter is a multi-provider LLM aggregator offering unified API access to 300+ models from all major labs and emerging providers, with automatic failover for reliability.
Compare DeepSeek V4.1 Flash across 2 providers to find the best fit for your use caseSetup recipe
Docs fallbackUse the provider REST API or SDKCreate a provider API keymodel: deepseek/deepseek-v4.1-flashdeepseek/deepseek-v4.1-flashRequest example
deepseek/deepseek-v4.1-flash.Gotchas
- Use provider model ID "deepseek/deepseek-v4.1-flash", not the LLMReference slug "deepseek-v4.1-flash".
Compare DeepSeek V4.1 Flash Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| DeepSeek Platform | $0.15 | $0.60 |
| OpenRouter | $0.15 | $0.60 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $0.15 |
| Output tokens | $0.60 |
Capabilities
About DeepSeek V4.1 Flash
DeepSeek V4.1 Flash is a 552B-parameter (8B prefill / 16B decode activated) mixture-of-experts model with Compressed Expert Dispatch (CED), released September 10, 2026 under the MIT license. It supports 1M-token context, up to 384K output tokens, multimodal vision input, reasoning, function calling, tool use, structured outputs, and prompt caching. Weights are available on Hugging Face. The DeepSeek API serves it as deepseek-flash; legacy API aliases deepseek-v4-flash and deepseek-v4-flash-vision-exp route to this model. Off-peak API pricing: $0.15/1M input, $0.60/1M output (cache read: $0.003/1M); peak hours are 2×.