Last refreshed 2026-10-19. Next refresh: weekly.
Why use DeepSeek V4 Flash on OpenRouter?
OpenRouter offers DeepSeek V4 Flash with pay-as-you-go pricing at $0.09/1M 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 Flash across 6 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-flashdeepseek/deepseek-v4-flashRequest example
deepseek/deepseek-v4-flash.Gotchas
- Use provider model ID "deepseek/deepseek-v4-flash", not the LLMReference slug "deepseek-v4-flash".
Compare DeepSeek V4 Flash Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| DeepSeek Platform | — | — |
| OpenRouter | $0.09 | $0.18 |
| Microsoft Foundry | $0.19 | $0.51 |
| Vercel AI Gateway | $0.13 | $0.26 |
| Novita AI | $0.14 | $0.28 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $0.09 |
| Output tokens | $0.18 |
Capabilities
About DeepSeek V4 Flash
DeepSeek V4 Flash is a 284B parameter (13B activated) Mixture-of-Experts language model with 1M-token context. It uses a hybrid attention architecture combining Compressed Sparse Attention (CSA) and Heavily Compressed Attention (HCA) for long-context inference, and supports thinking and non-thinking modes. MIT licensed. The legacy API aliases deepseek-chat and deepseek-reasoner mapped to its non-thinking and thinking modes and were scheduled for discontinuation on July 24, 2026. DeepSeek retired the model from its API on September 10, 2026. The legacy model name deepseek-v4-flash is still accepted, and DeepSeek now serves those requests with DeepSeek-V4.1-Flash-1017.