DeepSeek V3.1 Terminus (Reasoning): Intelligence, Performance & Price Analysis

Analysis of DeepSeek's DeepSeek V3.1 Terminus (Reasoning) and comparison to other AI models across key metrics including quality, price, performance (tokens per second & time to first token), context window & more. Click on any model to compare API providers for that model. For more details including relating to our methodology, see our FAQs.

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Comparison Summary

Intelligence:

DeepSeek V3.1 Terminus is of higher intelligence compared to average, with Artificial Analysis Intelligence Index of 55.

Price:

DeepSeek V3.1 Terminus is cheaper compared to average with a price of $0.84 per 1M Tokens (blended 3:1).
DeepSeek V3.1 Terminus Input token price: $0.56, Output token price: $1.68 per 1M Tokens.

Speed:

DeepSeek V3.1 Terminus is slower compared to average, with a output speed of 24.3 tokens per second.

Latency:

DeepSeek V3.1 Terminus has a lower latency compared to average, taking 3.04s to receive the first token (TTFT).

Context Window:

DeepSeek V3.1 Terminus has a smaller context windows than average, with a context window of 130k tokens.

Highlights

Intelligence

Artificial Analysis Intelligence Index; Higher is better

Speed

Output Tokens per Second; Higher is better

Price

USD per 1M Tokens; Lower is better

Navigation

Intelligence Intelligence Index Token Use & Cost Context Window Pricing Performance Summary Speed Latency Speed Comparisons End-to-End Response Time Intelligence Index Comparisons Comparisons

DeepSeek V3.1 Terminus (Reasoning) Model Details

Creator
Context Window	128k tokens (~192 A4 pages of size 12 Arial font)
Release Date	September, 2025
Parameters	685B, 37B active at inference time
Image Input Support	No
Open Source (Weights)	Yes
License	MIT
License Supports Commercial Use Without Restrictions	Yes

Further details

Model Name	Creator	License	Context Window

GPT-4o mini	OpenAI	Proprietary	128k
GPT-5 (minimal)	OpenAI	Proprietary	400k
gpt-oss-120B (high)	OpenAI	Open	131k
GPT-5 nano (minimal)	OpenAI	Proprietary	400k
GPT-5 nano (medium)	OpenAI	Proprietary	400k
GPT-4.1 mini	OpenAI	Proprietary	1m
GPT-4.1 nano	OpenAI	Proprietary	1m
GPT-5 mini (medium)	OpenAI	Proprietary	400k
gpt-oss-20B (high)	OpenAI	Open	131k
o3-pro	OpenAI	Proprietary	200k
GPT-5 (ChatGPT)	OpenAI	Proprietary	128k
GPT-5 (high)	OpenAI	Proprietary	400k
o4-mini (high)	OpenAI	Proprietary	200k
GPT-5 (medium)	OpenAI	Proprietary	400k
GPT-5 (low)	OpenAI	Proprietary	400k
GPT-4.1	OpenAI	Proprietary	1m
o3	OpenAI	Proprietary	200k
o3-mini	OpenAI	Proprietary	200k
GPT-5 mini (minimal)	OpenAI	Proprietary	400k
o3-mini (high)	OpenAI	Proprietary	200k
GPT-4o (ChatGPT)	OpenAI	Proprietary	128k
GPT-5 nano (high)	OpenAI	Proprietary	400k
GPT-5 mini (high)	OpenAI	Proprietary	400k
o1	OpenAI	Proprietary	200k
o1-preview	OpenAI	Proprietary	128k
o1-mini	OpenAI	Proprietary	128k
GPT-4o (Aug '24)	OpenAI	Proprietary	128k
GPT-4o (May '24)	OpenAI	Proprietary	128k
GPT-4 Turbo	OpenAI	Proprietary	128k
GPT-4o (Nov '24)	OpenAI	Proprietary	128k
GPT-3.5 Turbo	OpenAI	Proprietary	4k
GPT-4o (March 2025, chatgpt-4o-latest)	OpenAI	Proprietary	128k
o1-pro	OpenAI	Proprietary	200k
GPT-4.5 (Preview)	OpenAI	Proprietary	128k
GPT-4	OpenAI	Proprietary	8k
GPT-4o Realtime (Dec '24)	OpenAI	Proprietary	128k
GPT-4o mini Realtime (Dec '24)	OpenAI	Proprietary	128k
GPT-3.5 Turbo (0613)	OpenAI	Proprietary	4k

Grok-1	xAI	Open	8k
Grok 3 mini Reasoning (Low)	xAI	Proprietary	1m
Grok 4	xAI	Proprietary	256k
Grok 3 mini Reasoning (high)	xAI	Proprietary	1m
Grok 4 Fast	xAI	Proprietary	2m
Grok 3	xAI	Proprietary	1m
Grok Code Fast 1	xAI	Proprietary	256k
Grok 3 Reasoning Beta	xAI	Proprietary	1m
Grok 4 Fast (Reasoning)	xAI	Proprietary	2m
Grok Beta	xAI	Proprietary	128k
Grok 2 (Dec '24)	xAI	Open	131k

PALM-2	Google	Proprietary	8k
Gemini 2.5 Flash	Google	Proprietary	1m
Gemma 3 27B Instruct	Google	Open	128k
Gemma 3 12B Instruct	Google	Open	128k
Gemma 3 4B Instruct	Google	Open	128k
Gemini 2.5 Flash (Reasoning)	Google	Proprietary	1m
Gemini 2.5 Flash-Lite	Google	Proprietary	1m
Gemma 3n E2B Instruct	Google	Open	32k
Gemini 2.5 Flash-Lite (Reasoning)	Google	Proprietary	1m
Gemma 3 1B Instruct	Google	Open	32k
Gemma 3n E4B Instruct	Google	Open	32k
Gemini 2.5 Pro	Google	Proprietary	1m
Gemini 2.0 Pro Experimental (Feb '25)	Google	Proprietary	2m
Gemini 2.0 Flash (experimental)	Google	Proprietary	1m
Gemini 1.5 Pro (Sep '24)	Google	Proprietary	2m
Gemini 2.0 Flash-Lite (Preview)	Google	Proprietary	1m
Gemini 2.0 Flash (Feb '25)	Google	Proprietary	1m
Gemini 1.5 Flash (Sep '24)	Google	Proprietary	1m
Gemma 2 27B	Google	Open	8k
Gemma 2 9B	Google	Open	8k
Gemini 1.5 Flash-8B	Google	Proprietary	1m
Gemini 1.5 Pro (May '24)	Google	Proprietary	2m
Gemini 2.0 Flash Thinking Experimental (Jan '25)	Google	Proprietary	1m
Gemini 2.5 Flash Preview	Google	Proprietary	1m
Gemini 2.5 Flash Preview (Reasoning)	Google	Proprietary	1m
Gemini 2.5 Pro Preview (Mar' 25)	Google	Proprietary	1m
Gemini 1.0 Pro	Google	Proprietary	33k
Gemini 1.5 Flash (May '24)	Google	Proprietary	1m
Gemini 2.5 Pro Preview (May' 25)	Google	Proprietary	1m
Gemini 2.0 Flash-Lite (Feb '25)	Google	Proprietary	1m
Gemini 1.0 Ultra	Google	Proprietary	33k
Gemini 2.0 Flash Thinking Experimental (Dec '24)	Google	Proprietary	2m
Gemma 3n E4B Instruct Preview (May '25)	Google	Open	32k

Llama 3.3 Instruct 70B	Meta	Open	128k
Llama 3.1 Instruct 405B	Meta	Open	128k
Llama 3.2 Instruct 90B (Vision)	Meta	Open	128k
Llama 3.2 Instruct 11B (Vision)	Meta	Open	128k
Llama 4 Scout	Meta	Open	10m
Llama 4 Maverick	Meta	Open	1m
Llama 65B	Meta	Open	2k
Llama 3.1 Instruct 70B	Meta	Open	128k
Llama 3.1 Instruct 8B	Meta	Open	128k
Llama 3.2 Instruct 3B	Meta	Open	128k
Llama 3 Instruct 70B	Meta	Open	8k
Llama 3 Instruct 8B	Meta	Open	8k
Llama 3.2 Instruct 1B	Meta	Open	128k
Llama 2 Chat 13B	Meta	Open	4k
Llama 2 Chat 7B	Meta	Open	4k
Llama 2 Chat 70B	Meta	Open	4k

Claude 4 Sonnet	Anthropic	Proprietary	1m
Claude 4 Sonnet (Extended Thinking)	Anthropic	Proprietary	1m
Claude 4.1 Opus (Extended Thinking)	Anthropic	Proprietary	200k
Claude 4 Opus	Anthropic	Proprietary	200k
Claude 4 Opus (Extended Thinking)	Anthropic	Proprietary	200k
Claude 4.1 Opus	Anthropic	Proprietary	200k
Claude 3.5 Sonnet (Oct '24)	Anthropic	Proprietary	200k
Claude 3.5 Sonnet (June '24)	Anthropic	Proprietary	200k
Claude 3 Opus	Anthropic	Proprietary	200k
Claude 3.5 Haiku	Anthropic	Proprietary	200k
Claude 3 Sonnet	Anthropic	Proprietary	200k
Claude 3 Haiku	Anthropic	Proprietary	200k
Claude Instant	Anthropic	Proprietary	100k
Claude 3.7 Sonnet (Standard)	Anthropic	Proprietary	200k
Claude 3.7 Sonnet (Extended Thinking)	Anthropic	Proprietary	200k
Claude 2.1	Anthropic	Proprietary	200k
Claude 2.0	Anthropic	Proprietary	100k

Ministral 8B	Mistral	Open	128k
Ministral 3B	Mistral	Proprietary	128k
Mistral Medium 3	Mistral	Proprietary	128k
Devstral Small (Jul '25)	Mistral	Open	256k
Magistral Small 1.2	Mistral	Open	128k
Mistral Small 3.2	Mistral	Open	128k
Codestral (Jan '25)	Mistral	Proprietary	256k
Mistral Medium 3.1	Mistral	Proprietary	128k
Magistral Small 1	Mistral	Open	40k
Magistral Medium 1	Mistral	Proprietary	40k
Magistral Medium 1.2	Mistral	Proprietary	128k
Devstral Medium	Mistral	Proprietary	256k
Mistral Large 2 (Nov '24)	Mistral	Open	128k
Mistral Large 2 (Jul '24)	Mistral	Open	128k
Pixtral Large	Mistral	Open	128k
Mistral Small 3	Mistral	Open	32k
Mistral Small (Sep '24)	Mistral	Open	33k
Mixtral 8x22B Instruct	Mistral	Open	65k
Mistral Small (Feb '24)	Mistral	Proprietary	33k
Mistral Large (Feb '24)	Mistral	Proprietary	33k
Pixtral 12B (2409)	Mistral	Open	128k
Mistral NeMo	Mistral	Open	128k
Mixtral 8x7B Instruct	Mistral	Open	33k
Codestral-Mamba	Mistral	Open	256k
Mistral 7B Instruct	Mistral	Open	8k
Devstral Small (May '25)	Mistral	Open	256k
Mistral Small 3.1	Mistral	Open	128k
Mistral Saba	Mistral	Proprietary	32k
Codestral (May '24)	Mistral	Open	33k
Mistral Medium	Mistral	Proprietary	33k

DeepSeek V3.1 Terminus (Reasoning)	DeepSeek	Open	128k
DeepSeek R1 0528 (May '25)	DeepSeek	Open	128k
DeepSeek V3.1 Terminus	DeepSeek	Open	128k
DeepSeek R1 0528 Qwen3 8B	DeepSeek	Open	33k
DeepSeek R1 Distill Llama 70B	DeepSeek	Open	128k
DeepSeek R1 Distill Qwen 32B	DeepSeek	Open	128k
DeepSeek V3 (Dec '24)	DeepSeek	Open	128k
DeepSeek R1 Distill Qwen 14B	DeepSeek	Open	128k
DeepSeek-V2.5 (Dec '24)	DeepSeek	Open	128k
DeepSeek-Coder-V2	DeepSeek	Open	128k
DeepSeek R1 Distill Llama 8B	DeepSeek	Open	128k
DeepSeek LLM 67B Chat (V1)	DeepSeek	Open	4k
DeepSeek R1 Distill Qwen 1.5B	DeepSeek	Open	128k
DeepSeek V3.1 (Non-reasoning)	DeepSeek	Open	128k
DeepSeek R1 (Jan '25)	DeepSeek	Open	128k
DeepSeek V3.1 (Reasoning)	DeepSeek	Open	128k
DeepSeek V3 0324	DeepSeek	Open	128k
DeepSeek Coder V2 Lite Instruct	DeepSeek	Open	128k
DeepSeek-V2.5	DeepSeek	Open	128k
DeepSeek-V2-Chat	DeepSeek	Open	128k

R1 1776	Perplexity	Open	128k
Sonar Reasoning Pro	Perplexity	Proprietary	127k
Sonar Reasoning	Perplexity	Proprietary	127k
Sonar	Perplexity	Proprietary	127k
Sonar Pro	Perplexity	Proprietary	200k

Nova Premier	Amazon	Proprietary	1m
Nova Pro	Amazon	Proprietary	300k
Nova Lite	Amazon	Proprietary	300k
Nova Micro	Amazon	Proprietary	130k

Phi-4	Microsoft Azure	Open	16k
Phi-4 Multimodal Instruct	Microsoft Azure	Open	128k
Phi-3 Medium Instruct 14B	Microsoft Azure	Open	128k
Phi-4 Mini Instruct	Microsoft Azure	Open	128k
Phi-3 Mini Instruct 3.8B	Microsoft Azure	Open	4k

LFM2 1.2B	Liquid AI	Open	33k
LFM 40B	Liquid AI	Proprietary	32k

Solar Pro 2	Upstage	Proprietary	66k
Solar Pro 2 (Reasoning)	Upstage	Proprietary	66k
Solar Mini	Upstage	Open	4k
Solar Pro 2 (Preview)	Upstage	Proprietary	64k
Solar Pro 2 (Preview) (Reasoning)	Upstage	Proprietary	64k

MiniMax-Text-01	MiniMax	Open	4m
MiniMax M1 80k	MiniMax	Open	1m
MiniMax M1 40k	MiniMax	Open	1m

Llama 3.1 Nemotron Instruct 70B	NVIDIA	Open	128k
Llama Nemotron Super 49B v1.5	NVIDIA	Open	128k
Llama 3.3 Nemotron Super 49B v1	NVIDIA	Open	128k
NVIDIA Nemotron Nano 9B V2 (Reasoning)	NVIDIA	Open	131k
Llama 3.1 Nemotron Ultra 253B v1 (Reasoning)	NVIDIA	Open	128k
Llama Nemotron Super 49B v1.5 (Reasoning)	NVIDIA	Open	128k
NVIDIA Nemotron Nano 9B V2	NVIDIA	Open	131k
Llama 3.3 Nemotron Super 49B v1 (Reasoning)	NVIDIA	Open	128k
Llama 3.1 Nemotron Nano 4B v1.1 (Reasoning)	NVIDIA	Open	128k

Kimi K2	Moonshot AI	Open	128k
Kimi K2 0905	Moonshot AI	Open	256k

Granite 3.3 Instruct 8B	IBM	Open	128k

Reka Flash 3	Reka AI	Open	128k
Reka Flash (Sep '24)	Reka AI	Proprietary	128k
Reka Core	Reka AI	Proprietary	128k
Reka Flash (Feb '24)	Reka AI	Proprietary	128k
Reka Edge	Reka AI	Proprietary	128k

Hermes 4 - Llama-3.1 70B	Nous Research	Open	128k
Hermes 4 - Llama-3.1 70B (Reasoning)	Nous Research	Open	128k
Hermes 4 - Llama-3.1 405B	Nous Research	Open	128k
DeepHermes 3 - Llama-3.1 8B Preview	Nous Research	Open	128k
Hermes 4 - Llama-3.1 405B (Reasoning)	Nous Research	Open	128k
DeepHermes 3 - Mistral 24B Preview	Nous Research	Open	32k
Hermes 3 - Llama-3.1 70B	Nous Research	Open	128k

Exaone 4.0 1.2B (Reasoning)	LG AI Research	Open	64k
Exaone 4.0 1.2B	LG AI Research	Open	64k
EXAONE 4.0 32B	LG AI Research	Open	131k
EXAONE 4.0 32B (Reasoning)	LG AI Research	Open	131k

GLM-4.5-Air	Z AI	Open	128k
GLM-4.5	Z AI	Open	128k
GLM-4.5V	Z AI	Open	64k
GLM-4.5V (Reasoning)	Z AI	Open	64k

Aya Expanse 32B	Cohere	Open	128k
Aya Expanse 8B	Cohere	Open	8k
Command A	Cohere	Open	256k
Command-R+ (Aug '24)	Cohere	Open	128k
Command-R+ (Apr '24)	Cohere	Open	128k
Command-R (Aug '24)	Cohere	Open	128k
Command-R (Mar '24)	Cohere	Open	128k

Jamba 1.7 Mini	AI21 Labs	Open	258k
Jamba 1.7 Large	AI21 Labs	Open	256k
Jamba 1.6 Large	AI21 Labs	Open	256k
Jamba 1.5 Mini	AI21 Labs	Open	256k
Jamba 1.6 Mini	AI21 Labs	Open	256k
Jamba 1.5 Large	AI21 Labs	Open	256k
Jamba Instruct	AI21 Labs	Proprietary	256k

Qwen3 235B A22B 2507 (Reasoning)	Alibaba	Open	256k
QwQ 32B	Alibaba	Open	131k
Qwen3 Next 80B A3B	Alibaba	Open	262k
Qwen3 4B 2507 (Reasoning)	Alibaba	Open	262k
Qwen3 235B A22B 2507 (Non-reasoning)	Alibaba	Open	256k
Qwen3 Max (Preview)	Alibaba	Proprietary	262k
Qwen3 Next 80B A3B (Reasoning)	Alibaba	Open	262k
Qwen3 Coder 30B A3B	Alibaba	Open	262k
Qwen3 Coder 480B A35B	Alibaba	Open	262k
Qwen3 30B A3B 2507 (Reasoning)	Alibaba	Open	262k
Qwen3 30B A3B 2507 (Non-reasoning)	Alibaba	Open	262k
Qwen Chat 14B	Alibaba	Open	8k
Qwen2.5 Max	Alibaba	Proprietary	32k
Qwen2.5 Instruct 72B	Alibaba	Open	131k
Qwen2.5 Coder Instruct 32B	Alibaba	Open	131k
Qwen2.5 Turbo	Alibaba	Proprietary	1m
Qwen2 Instruct 72B	Alibaba	Open	131k
Qwen3 235B A22B (Reasoning)	Alibaba	Open	33k
QwQ 32B-Preview	Alibaba	Open	33k
Qwen3 32B	Alibaba	Open	33k
Qwen3 32B (Reasoning)	Alibaba	Open	33k
Qwen3 30B A3B (Reasoning)	Alibaba	Open	33k
Qwen3 8B (Reasoning)	Alibaba	Open	131k
Qwen3 4B	Alibaba	Open	32k
Qwen3 4B (Reasoning)	Alibaba	Open	32k
Qwen3 1.7B (Reasoning)	Alibaba	Open	32k
Qwen2.5 Instruct 32B	Alibaba	Open	128k
Qwen2.5 Coder Instruct 7B	Alibaba	Open	131k
Qwen3 0.6B	Alibaba	Open	32k
Qwen3 0.6B (Reasoning)	Alibaba	Open	32k
Qwen1.5 Chat 110B	Alibaba	Open	32k
Qwen Chat 72B	Alibaba	Open	34k
Qwen3 235B A22B	Alibaba	Open	33k
Qwen3 14B	Alibaba	Open	33k
Qwen3 8B	Alibaba	Open	33k
Qwen3 1.7B	Alibaba	Open	32k
Qwen3 14B (Reasoning)	Alibaba	Open	33k
Qwen3 30B A3B	Alibaba	Open	33k

OpenChat 3.5 (1210)	OpenChat	Open	8k

DBRX Instruct	Databricks	Open	33k

Llama 3.1 Tulu3 405B	Allen Institute for AI	Open	128k

Arctic Instruct	Snowflake	Open	4k

Yi-Large	01.AI	Proprietary	32k

DeepSeek V3.1 Terminus (Reasoning): Intelligence, Performance & Price Analysis

Highlights

Navigation

DeepSeek V3.1 Terminus (Reasoning) Model Details

Comparisons to DeepSeek V3.1 Terminus