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DeepSeek V3.1 Terminus

DeepSeek · released September 2025

DeepSeek V3.1 Terminus is a DeepSeek model with a 131K token context window — about 190 pages of text. It reads Text and replies in Text. It can show its reasoning before it answers.

$0.310

input / 1M tokens

$1.15

output / 1M tokens

131K

context — about 190 pages

0.25¢

a client proposal

Pricing

Input
$0.310 per million tokens
Output
$1.15 per million tokens
Cached input
$0.155 per million tokens

Billed from your Alyph wallet. Prices can change when the provider changes theirs — last checked August 9, 2026.

The numbers

Provider
DeepSeek
Released
September 2025 (2025-09-22)
Context window
131K tokens — about 190 pages
Max output
33K tokens per reply
Input
Text
Output
Text
Reasoning
Shows its thinking before answering
Knowledge cutoff
2025-03-31

Cost vs Token Amount

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80% Input20% Output
free$0.24$0.480 tokens250k500k750k1000k
DeepSeek V3.1 Terminus

Adjust the ratio slider to change how output tokens influence the final price for equivalent workloads.

What a task costs

2K tokens in · 500 tokens out.

DeepSeek V3.1 Terminus

DeepSeek

0.12¢

for this task

52% input · 48% output

Full pricing →

Your $5 welcome credit covers about 4,180 of these.

Compare DeepSeek V3.1 Terminus

Closest in price on a typical task:

DeepSeek V3.1 Terminus vs Qwen2.5 72B Instruct →DeepSeek V3.1 Terminus vs DeepSeek V3 →DeepSeek V3.1 Terminus vs Mistral Small 3.1 24B →DeepSeek V3.1 Terminus vs MiniMax M2 →Any other combination →

Questions, answered

How much does DeepSeek V3.1 Terminus cost on Alyph?

DeepSeek V3.1 Terminus costs $0.310 per million input tokens and $1.15 per million output tokens on Alyph. A typical task — 5K tokens in, 800 out — works out to about 0.25¢. Billed from your Alyph wallet, with hard spending limits. Prices can change when the provider changes theirs; this page was last checked on August 9, 2026.

What is DeepSeek V3.1 Terminus's context window?

131K tokens — about 190 pages. Replies can be up to 33K tokens long.

Can DeepSeek V3.1 Terminus read images and files?

DeepSeek V3.1 Terminus is text-only. The canvas still serializes uploads into plain text, so you can work with files — but it cannot see images.

Does DeepSeek V3.1 Terminus show its reasoning?

Yes. DeepSeek V3.1 Terminus can expose its thinking before the final answer, so you can watch how it got there.

Test DeepSeek V3.1 Terminus against Qwen2.5 72B Instruct

One prompt, both models at the same time, the better answer wins. Free to start, with $5 of credit.

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