How much does DeepSeek V3.1 Terminus cost per million tokens?

DeepSeek V3.1 Terminus costs $0.3 per million input tokens and $1 per million output tokens at list price, and $0.135 per million cached input tokens.

What is the context window of DeepSeek V3.1 Terminus?

DeepSeek V3.1 Terminus accepts up to 163,840 tokens of context and returns up to 65,536 output tokens.

How much do 1,000 chat messages cost with DeepSeek V3.1 Terminus?

About $0.80, assuming 1,000 input + 500 output tokens per message.

Is there a cheaper alternative to DeepSeek V3.1 Terminus?

In the same price range, OpenAI GPT-6 Luna Pro ($0.1 / $0.5), OpenAI GPT-6 Luna ($0.1 / $0.5), Qwen Qwen3.8 Omni Flash ($0.15 / $0.47) cost less per token. Quality differs: test on your own prompts.

Where can I buy DeepSeek API credits for less?

Discount credit books resell OpenRouter usage below face value within their depth, OpenRouter adds a 5.5% card fee, and DeepSeek sells its own credits at face value. The live table on this page ranks them for $100 of usage.

DeepSeek · live price

DeepSeek V3.1 Terminus API pricing

DeepSeek-V3.1 Terminus is an update to DeepSeek 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...

Small and cheap (under $1 per 1M)Tool callingReasoning

Input: $0.3; per 1M tokens
Output: $1; per 1M tokens
Cached input: $0.135; per 1M tokens
Context: 164K; 66K max output

List price from OpenRouter, which passes DeepSeek's price through without markup. Refreshed hourly. Released September 22, 2025. Model id deepseek/deepseek-v3.1-terminus.

What DeepSeek V3.1 Terminus costs in practice

At list price, before any batch or caching discount.

1,000 chat messages

$0.80

1,000 input + 500 output tokens each

1,000 RAG questions

$2.90

8,000 input + 500 output tokens each

100 coding-agent steps

$1.10

30,000 input + 2,000 output tokens each, no caching

DeepSeek V3.1 Terminus price history

No price change since we started tracking on 2026-10-01. We record prices daily; changes will show here.

DeepSeek V3.1 Terminus price by host

SiliconFlow serves it below list price right now. Route to it to pay less on every token.

SiliconFlow$0.27 in · $1 out · 164K ctx · 97.7% uptime 24h
AtlasCloud$0.3 in · $1 out · 131K ctx · 99.2% uptime 24h
StreamLake$0.343 in · $1.03 out · 128K ctx · 99.6% uptime 24h

Where to buy DeepSeek credits for less

DeepSeek V3.1 Terminus costs the same per token everywhere it's sold through OpenRouter. What changes is the price of the credits. Live quotes for $100 of usage:

#	Where you buy	You payYou pay for $100.00 of usage	vs list price	Price source
1	OrbioCardCheapest right now Credits from a discount book, plus a 5% platform fee and card processing, both included in the quote.	$85.10 incl. $2.60 card processing	-14.9%	live quote
2	smaaartCard Credits from a discount book, plus a 5% platform fee on face value. Card processing and taxes shown at checkout.	$95.00 + card processing and tax at checkout (not in this number)	-5.0%	live quote
3	Direct from the labCard Prepaid credits at face value (OpenAI, Anthropic, Google…). Taxes may apply.	$100.00 no top-up fee	list price	face value
4	OpenRouterCrypto 5% on crypto purchases. No markup on model prices.	$105.00 fees included	+5.0%	published fee
5	OpenRouterCard 5.5% on card purchases, $0.80 minimum. No markup on model prices.	$105.50 fees included	+5.5%	published fee

Disclosure: this site is run by the team behind smaaart, one of the options compared. Tables are ranked by price only, from live quotes and published fees, including when smaaart isn't first. How we compare

DeepSeek V3.1 Terminus cost calculator

Enter your monthly tokens to price your own usage.

Model$0.3 in / $1.00 out per 1M tokens · list price, liveInput tokens / month (millions)Output tokens / month (millions)

Usage at list price$25.00/ month

Cheaper alternatives to DeepSeek V3.1 Terminus

Other labs' models in the same price range or the one below, cheaper per token.

Model	Input / 1M	Output / 1M	Blended 3:1	Context
OpenAI: GPT-6 Luna Pro	$0.1	$0.5	$0.2	1.1M
OpenAI: GPT-6 Luna	$0.1	$0.5	$0.2	1.1M
Qwen: Qwen3.8 Omni Flash	$0.15	$0.47	$0.23	1M
Qwen: Qwen3.8 Flash	$0.15	$0.47	$0.23	1M
Z.ai: GLM 5.3 Flash	$0.15	$0.5	$0.237	1.0M
Qwen: Qwen3.7 Flash	$0.03	$0.13	$0.055	1M

Other DeepSeek models

Model	Input / 1M	Output / 1M	Blended 3:1	Context
DeepSeek V3.2 Exp	$0.27	$0.41	$0.305	164K
DeepSeek V3.1	$0.25	$0.95	$0.425	164K
DeepSeek V3.2	$0.28	$0.42	$0.315	164K
R1 0528	$0.5	$2.15	$0.913	164K
DeepSeek V3 0324	$0.29	$1.14	$0.502	164K
DeepSeek V4 Flash 0423	$0.042	$0.084	$0.052	1.0M

All DeepSeek API prices