Text model · DeepSeek

DeepSeek V4 Flash API

DeepSeek V4 Flash is DeepSeek's fast general-purpose V4 model. On TokenRa it answers directly, without a reasoning step, and takes text input only.

Model ID: deepseek-v4-flash
API formats: Chat Completions, Responses, Messages
Input: Text
Output: Text

Capabilities

Capabilities & endpoints

Chat generation through three API formats. Each was called successfully on tokenra.io on 2026-10-23; pick one to switch the code examples.

POSThttps://tokenra.io/v1/chat/completionsTested

OpenAI SDK with base_url="https://tokenra.io/v1". Auth: Authorization: Bearer. Recommended.

POSThttps://tokenra.io/v1/responsesTested

OpenAI Responses API, same SDK and key. Text answer in output_text.

POSThttps://tokenra.io/v1/messagesTested

Anthropic SDK or Claude Code with base URL https://tokenra.io. Auth: x-api-key (or Bearer) plus anthropic-version.

Request

Request parameters

Fields for POST /v1/chat/completions. Everything listed was accepted by the model in testing.

Parameter	Type	Required	Description
`model`	string	Yes	The model ID to call, for example `deepseek-v4-flash`.
`messages`	array	Yes	Conversation messages in order (system, user, assistant, tool). For multi-turn chat, send the earlier turns back in this array. This model takes text only, so `content` should be a string.
`stream`	boolean	No	Return the answer as server-sent events. Default `false`.
`stream_options`	object	No	With `{"include_usage": true}`, the last chunk carries `usage` and an empty `choices` array.
`max_tokens`	integer	No	Upper limit for generated tokens.
`max_completion_tokens`	integer	No	Upper limit for all generated tokens, reasoning included. If it is too low the answer can be empty (`finish_reason: "length"`).
`temperature`	number	No	Sampling temperature.
`top_p`	number	No	Nucleus sampling threshold. Usually tune either this or temperature.
`presence_penalty`	number	No	Penalises tokens that already appeared, nudging the model toward new topics.
`frequency_penalty`	number	No	Penalises frequent tokens to reduce repetition.
`response_format`	object	No	`{"type": "json_object"}` returns a JSON object. `{"type": "json_schema", "json_schema": {...}}` returns JSON that matches your schema (tested with `strict: true`).
`tools`	array	No	Function tools the model may call (`type: "function"`).
`tool_choice`	string / object	No	`auto`, `none`, `required`, or a specific function.
`parallel_tool_calls`	boolean	No	Allow several tool calls in one response.
`user`	string	No	Your own end-user identifier for auditing or abuse handling. It is not part of the conversation.

Other formats

Format	Required fields	Answer location
OpenAI Responses	`model`, `input`	`output_text`
Anthropic Messages	`model`, `max_tokens`, `messages`	`content[]` blocks of type `text`

Response

Response format

{
  "id": "chatcmpl-1792766122484",
  "object": "chat.completion",
  "created": 1792766122,
  "model": "deepseek-v4-flash",
  "choices": [
    {
      "index": 0,
      "message": {
        "role": "assistant",
        "content": "An API gateway is the single entry point that receives client requests and routes them to the right backend service. It also handles shared concerns such as authentication, rate limiting and logging."
      },
      "finish_reason": "stop"
    }
  ],
  "usage": {
    "prompt_tokens": 26,
    "completion_tokens": 58,
    "total_tokens": 84,
    "prompt_tokens_details": {
      "cached_tokens": 0
    }
  }
}

Field	Type	Description
`id`	string	Completion ID. Include it when you contact support.
`object`	string	`chat.completion`, or `chat.completion.chunk` when streaming.
`created`	integer	Unix timestamp in seconds.
`model`	string	The model that produced the answer.
`choices[].message.content`	string	The answer text.
`choices[].message.tool_calls`	array	Tool calls requested by the model, when `tools` were sent.
`choices[].finish_reason`	string	`stop`, `length` or `tool_calls`.
`usage`	object	`prompt_tokens`, `completion_tokens`, `total_tokens`, plus `prompt_tokens_details.cached_tokens` and `completion_tokens_details.reasoning_tokens`.

With stream: true the answer arrives as data: lines of chat.completion.chunk objects and ends with data: [DONE].

Errors

Errors & limits

Common errors

HTTP	error.code	Meaning	What to do
`401`	—	Missing, wrong or deleted API key. The message is `Invalid token`.	Check the `Authorization: Bearer` header and the key in the console.
`400`	—	The body is not valid JSON.	Fix the JSON and send `Content-Type: application/json`.
`500`	`invalid_request`	A required field is missing, for example `messages`.	Add the field named in the message. Retrying will not help.
`403`	`insufficient_user_quota`	Your balance or plan quota is used up.	Top up in the console, then retry.
`503`	`model_not_found`	Unknown model ID, or no channel serves it for your group.	Check the ID in the model list or with `GET /v1/models`.
`429`	—	Too many requests.	Back off exponentially and retry.
`5xx`	—	The upstream provider failed or timed out.	Retry a few times; keep the request id if it persists.

Limits and notes

Image input is not supported: in testing the model replied that it could not see the image. Send text only.
The model answers directly; responses contain no reasoning_content.