Loading
RedRouterRedRouter

DeepSeek V4.1 Flash (0910)

deepseek-v4.1-flash-0910Available

DeepSeek's V4.1 Flash, September 10 release. Our lowest-cost model, suited to high-volume chat, extraction, and agent steps.

Specs and pricing

Model IDdeepseek-v4.1-flash-0910
Context262,144 tokens
Max output8,192 tokens
Default output1,024 tokens
Input price$0.04 per 1M tokens
Cached input price$0.008 per 1M tokens
Output price$0.15 per 1M tokens
API compatibilityOpenAI Chat Completions, OpenAI Responses, Anthropic Messages
Tool callingYes
JSON response formatYes

Quickstart

Set REDROUTER_API_KEY to a key from API Keys.

Base URL
https://redrouter.org/v1
Model ID
deepseek-v4.1-flash-0910
curl 'https://redrouter.org/v1/chat/completions' \
  -H "Authorization: Bearer $REDROUTER_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{"messages":[{"content":"Hello","role":"user"}],"model":"deepseek-v4.1-flash-0910"}'

Supported parameters

Other parameters are rejected with HTTP 400. The user field is accepted for compatibility and is not forwarded.

modelmessagesstreamstream_optionsmax_tokensmax_completion_tokenstemperaturetop_pstoppresence_penaltyfrequency_penaltyseedtoolstool_choiceparallel_tool_callsresponse_formatuserreasoning_effortreasoningenable_thinkingthinkingthinking_budgetchat_template_kwargsoutput_config

Request fields and limits

Deployment

Routing
Your request runs on the model you named. RedRouter does not substitute a different model.

Model version

As reported by the hosting provider. RedRouter has not independently verified the served weights.

Weights
deepseek-ai/DeepSeek-V4.1-Flash ↗
Revision
Not disclosed by host
License
Not disclosed by host
Quantization
Not disclosed by host
Tokenizer
Not disclosed by host
Chat template
Not disclosed by host