Short answer: I could not confirm an official DeepSeek model named DeepSeek 5 in the DeepSeek API documentation reviewed on November 9, 2026. The reviewed materials identify deepseek-flash as a documented API model name, but do not establish “DeepSeek 5” as a model name, release, or API identifier. That does not prove the name is unused elsewhere; it means the reviewed documentation does not verify a model to choose or integrate under that name. [1][2]
What does “DeepSeek 5” refer to?
The name remains unconfirmed in the official API documentation reviewed. DeepSeek’s pricing documentation lists deepseek-flash and associates it with DeepSeek-V4.1-Flash-1017. It does not identify that model as “DeepSeek 5.” [1]
Do not treat a similarly named listing or legacy identifier as confirmation. DeepSeek says the legacy names deepseek-v4-flash and deepseek-v4-flash-vision-exp are still accepted, but requests using them are served by DeepSeek-V4.1-Flash-1017 and billed at the Flash price. These are compatibility names for a different model, not evidence of a “DeepSeek 5” offering. [1][2]
Capabilities and model fit
Because the reviewed official documentation does not identify a “DeepSeek 5” model, it provides no verified specifications for that name. Do not assume another DeepSeek model’s capabilities or limits apply to it.
If you meant a documented first-party API option, DeepSeek lists deepseek-flash with a 1-million-token context window, tool-call support, and vision support. Those published specifications may help you decide what to test, but they do not establish performance for your application. Validate representative prompts, input types, output requirements, latency needs, and tool workflows before choosing. [1]
Production API access: documented alternative, not “DeepSeek 5”
DeepSeek’s API quickstart documents OpenAI-compatible and Anthropic-compatible access. It lists https://api.deepseek.com as the OpenAI-format base URL and https://api.deepseek.com/anthropic as the Anthropic-format base URL, and says to obtain an API key. The documented model name for Flash is deepseek-flash, not deepseek-5. [2]
For budgeting, DeepSeek lists separate token-price categories for cached input, uncached input, and output, with prices stated per 1 million tokens. Its pricing page defines peak hours as 01:00–04:00 and 06:00–10:00 UTC, Monday through Friday, excluding Chinese public holidays; all other hours are off-peak, including weekends and Chinese public holidays. Check the current official pricing page and confirm the applicable currency and rates before deployment; DeepSeek says prices may change. [1]
Third-party API access, if offered, is separate from DeepSeek’s first-party API. Before relying on a third-party listing, verify the exact upstream model and version, routing, provider-specific billing, and production terms. A listing under a similar name does not establish that “DeepSeek 5” is an official model.
Bottom line
Treat “DeepSeek 5” as an unconfirmed model name unless an authoritative source identifies that exact model and version. For a production integration, use a model name documented by the provider, confirm its current capabilities and pricing, and test it against your workload. The reviewed DeepSeek API materials document deepseek-flash; they do not verify a “DeepSeek 5” API offering.