DeepSeek V4.1 Flash 1017 is the October 17, 2026 snapshot of DeepSeek V4.1 Flash, a sparse mixture-of-experts model with stronger coding and agent performance and shorter outputs than the September release. Text and image input, 1M context, up to 384K output, thinking on by default, tool calling and JSON output. Open weights under the MIT license.
Context
1.05M
Max output
393K
Price per million tokens
$0.30in$0.006cached$1.20out
Fastest
248 tok/s
Released
Oct 2026
Promotion
FreeYour limits
Waterfall
Quickstart
I want you to route my LLM calls for "deepseek-v4.1-flash-1017" through the Experiential gateway instead of calling the provider directly. It speaks the OpenAI Chat Completions API, so this is a base-URL and key swap. Please: 1. Point the client at https://api.experientiallabs.ai/v1 as the base URL. 2. Authenticate with my Experiential API key from the EXPLABS_API_KEY environment variable. If it isn't set, stop and tell me to create one under Settings -> API Keys and export it. 3. Use the model id "deepseek-v4.1-flash-1017" exactly. 4. Update every place my code builds an LLM client for this model to use that base URL and key, leaving streaming and tool-calls as they are. 5. Make one test call and show me the reply plus the token usage, so we confirm it runs on my Experiential credits. Tell me which files you changed.
Sampling
Tools & structure
Reasoning
Streaming
Limits
Sending an unsupported field? See error reference