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DeepSeek V3.1 Terminus

Name: DeepSeek V3.1 Terminus
Brand: DeepSeek
Price: 0.270000 USD

text->text

Open-weights frontier model that matched GPT-4-class quality at a fraction of the inference cost. Sparked the late-2024 cost reset.

DeepSeek V3.1 Terminus is a efficient AI model from DeepSeek. It costs $0.270 per million input tokens and $1.000 per million output tokens (blended $0.489/M), with a 163,840-token context window.

Profile inherited from upstream DeepSeek-V3 ↗ — this is a hosted variant of the same open-weights model.

Modalities textOfficial model page ↗Provider pricing ↗API docs ↗Pricing source ↗Compare with another model →Estimate monthly cost →

INPUT

$0.270/M

per million input tokens

OUTPUT

$1.000/M

per million output tokens

BLENDED 70/30

$0.489/M

+3.2%over 91 days · hover to read

default reference rate · how it is calculated →

CONTEXT

163,840

tokens

What it is good at

Frontier quality, open weights
Aggressive pricing
Strong code & math
MoE architecture

Typical use cases

Self-hosted frontier inference
Cost-sensitive chat
Code generation

Benchmarks

vs. best public score

Scores inherited from DeepSeek-V3 — this is a hosted variant of the same open-weights model, so the underlying benchmark scores are identical.

MMLU88%

Multitask academic knowledge across 57 subjects.

GPQA Diamond59%

Graduate-level science questions, "Google-proof".

MATH90%

High-school competition math problems.

HumanEval89%

Python function synthesis from docstrings.

SWE-bench Verified42%

Real GitHub issues solved end-to-end.

LMArena Elo1318 Elo

Crowd-sourced head-to-head preference Elo rating.

Hand-curated from each provider's published reports and public leaderboards. Methodology varies across sources, treat as directional rather than authoritative.

More from DeepSeek

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in $1.740/Mout $3.480/M

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in $0.140/Mout $0.280/M

DeepSeek-V3

Frontier · 64,000 ctx

in $0.270/Mout $1.100/M

DeepSeek-V3-0324

Frontier · 128,000 ctx

in $0.270/Mout $1.100/M

DeepSeek-R1

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in $0.550/Mout $2.190/M

DeepSeek-R1-0528

Reasoning · 64,000 ctx

in $0.550/Mout $2.190/M

Frequently asked questions

How much does DeepSeek V3.1 Terminus cost?

DeepSeek V3.1 Terminus costs $0.270 per million input tokens and $1.000 per million output tokens, for a blended reference rate of $0.489 per million tokens.

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

DeepSeek V3.1 Terminus supports up to 163,840 tokens of context in a single request.

What is DeepSeek V3.1 Terminus best for?

DeepSeek V3.1 Terminus is well suited to Frontier quality, open weights, Aggressive pricing and Strong code & math.

Who makes DeepSeek V3.1 Terminus?

DeepSeek V3.1 Terminus is developed and served by DeepSeek.

Terms used on this page

Full glossary →

Token Input tokens Output tokens Price per million tokens Context window Prompt caching Batch API Blended cost