DeepSeek V4 Flash - ByteSpike

Vendor: DeepSeek Model ID: deepseek-v4-flash Capability: 64K context · tool use · streaming · structured output Pricing: per-token, flash tier (live rate) DeepSeek V4 Flash takes the V4 base and tunes for latency. Same strong code generation on bounded prompts, half the wait of V4 Pro on short inputs. Right pick for inline code suggestions, lint-style fixes, and any agent step where one or two seconds matters.

Request

curl https://llm.bytespike.ai/v1/chat/completions \
  -H "Authorization: Bearer $BYTESPIKE_API_KEY" \
  -H "content-type: application/json" \
  -d '{
    "model": "deepseek-v4-flash",
    "messages": [{"role": "user", "content": "Add type hints to this Python function."}]
  }'

Body parameters

Field	Type	Required	Default	Notes
`model`	string	yes	—	`deepseek-v4-flash`
`messages`	array	yes	—	—
`max_tokens`	integer	no	model max	Max: 8192.
`tools`	array	no	—	Function calling supported.
`response_format`	object	no	—	JSON / structured output.
`stream`	boolean	no	false	SSE streaming.

Response

{
  "id": "chatcmpl-…",
  "object": "chat.completion",
  "model": "deepseek-v4-flash",
  "choices": [{"index": 0, "message": {"role": "assistant", "content": "..."}, "finish_reason": "stop"}],
  "usage": {"prompt_tokens": 64, "completion_tokens": 142, "total_tokens": 206}
}

Code examples

curl https://llm.bytespike.ai/v1/chat/completions \
  -H "Authorization: Bearer $BYTESPIKE_API_KEY" \
  -H "content-type: application/json" \
  -d '{"model": "deepseek-v4-flash", "messages": [{"role": "user", "content": "Add type hints."}]}'

Streaming + caching

"stream": true for SSE. Automatic prompt caching.

Errors

Code	Trigger	Billed?
400 / 401 / 402 / 422 / 429	Standard	No
5xx	Upstream	No (auto-retry)

When to use

Inline code suggestions, lint-style fixes, IDE-integrated agents.
Latency-bound code routing.
For full V4 Pro quality on hard problems, see DeepSeek V4 Pro.
For prior generation, see DeepSeek V3.2.

Limits

Limit	Value
Context window	64K tokens
Max output	8192 tokens
Supports tool use	Yes
Supports vision	No
Supports streaming	Yes
Supports prompt caching	Automatic

DeepSeek V3.2 DeepSeek V4 Pro

​Request

​Body parameters

​Response

​Code examples

​Streaming + caching

​Errors

​When to use

​Limits