deepseek-ai/DeepSeek-V3.1-Terminus API price
On OpenCheap, deepseek-ai/DeepSeek-V3.1-Terminus (DeepSeek) costs $0.270 per 1M input tokens and $1.00 per 1M output tokens (cached input $0.270), through one OpenAI-compatible API.
Prices updated 2026-11-03 21:05 UTC.
Price per 1M tokens
| Input, our price | $0.270 |
|---|---|
| Output, our price | $1.00 |
| Cached input, our price | $0.270 |
| Context length | 163K tokens |
| OpenRouter list, input · output | $0.270 · $1.00 |
| vs list | same |
“vs list” compares our price with OpenRouter's list price on a 1:3 input:output blend, as on the Models page.
Variants
- DeepSeek V3.1 Terminus (Thinking) (
opencheap/deepseek-v3.1-terminus:thinking): $0.380 input · $1.10 output per 1M tokens
How to call deepseek-ai/DeepSeek-V3.1-Terminus
Base URL https://api.opencheap.si/v1, model id opencheap/deepseek-v3.1-terminus, and an API key from the console. Any OpenAI SDK works.
curl https://api.opencheap.si/v1/chat/completions \
-H "Authorization: Bearer $OPENCHEAP_API_KEY" -H "Content-Type: application/json" \
-d '{ "model": "opencheap/deepseek-v3.1-terminus", "messages": [{ "role": "user", "content": "Hi" }] }'import os
from openai import OpenAI
client = OpenAI(base_url="https://api.opencheap.si/v1", api_key=os.environ["OPENCHEAP_API_KEY"])
r = client.chat.completions.create(model="opencheap/deepseek-v3.1-terminus",
messages=[{"role": "user", "content": "Hi"}])
print(r.choices[0].message.content)FAQ
What is the cheapest deepseek-ai/DeepSeek-V3.1-Terminus API?
On OpenCheap, deepseek-ai/DeepSeek-V3.1-Terminus costs $0.270 per 1M input tokens and $1.00 per 1M output tokens, and cached input $0.270 per 1M tokens. Each request is routed to the cheapest healthy source for the model. You pay from one prepaid balance, with no monthly fee.
Is it OpenAI-compatible?
Yes. Point any OpenAI SDK or HTTP client at the base URL https://api.opencheap.si/v1 with an OpenCheap API key, and call /chat/completions with the model id opencheap/deepseek-v3.1-terminus. Requests and responses have the same shape as OpenAI's chat completions, streaming included.
Does it work with Cursor, Claude Code or Codex?
Yes. In Cursor, add the custom model opencheap/deepseek-v3.1-terminus with the base URL https://api.opencheap.si/v1. In Claude Code, set ANTHROPIC_BASE_URL to https://api.opencheap.si and ANTHROPIC_MODEL to opencheap/deepseek-v3.1-terminus. In Codex, add OpenCheap as a model provider with base_url https://api.opencheap.si/v1. The quickstart has each setup step by step.