---
id: "deepseek/deepseek-v3.1-terminus"
also: ["deepseek/deepseek-v3.1-terminus", "deepseek-ai/DeepSeek-V3.1-Terminus", "hf/deepseek-ai/DeepSeek-V3.1-Terminus", "vercel/deepseek/deepseek-v3.1-terminus"]
cheapest_list_usd_per_m: "0.27 in, 0.95 out, at deepinfra on hf"
cheapest_effective_usd_per_m: "0.2037 in, 0.948 out, at atlas-cloud/fp8 on openrouter"
context: 163840
max_output: 147456
input: ["text"]
output: ["text"]
released: "2025-09-22"
api: ["/api/v1/chat/completions", "/api/v1/completions", "/api/v1/messages", "/api/v1/responses"]
params: ["frequency_penalty", "include_reasoning", "logit_bias", "max_tokens", "min_p", "presence_penalty", "reasoning", "repetition_penalty", "response_format", "seed", "stop", "structured_outputs", "temperature", "tool_choice", "tools", "top_k", "top_p"]
endpoints: 9
gateways: "openrouter (5), hf (3), vercel (1)"
no_training: 4
trains: 0
retains_prompts: 2
coding: 43.5000
agentic: 6.8000
---
# DeepSeek: DeepSeek V3.1 Terminus

DeepSeek-V3.1 Terminus is an update to [DeepSeek V3.1](/deepseek/deepseek-chat-v3.1) that maintains the model's original capabilities while addressing issues reported by users, including language consistency and agent capabilities, further optimizing the model's...