DeepSeek V3.1 Terminus
by DeepSeek
DeepSeek-V3.1 Terminus is an update to [DeepSeek V3.1](/deepseek/deepseek-chat-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...
Quick Facts
Provider
DeepSeek
Model ID
deepseek/deepseek-v3.1-terminus
Modality
Text to Text
Tier
Premium
Last Updated
2026-07-12
Released
2025-09-22
Context Length
164K tokens
Tokenizer
DeepSeek
Input Price
$0.27/M
Output Price
$0.95/M
When To Use DeepSeek V3.1 Terminus
Best for
- Coding, debugging, and implementation planning
- Reasoning-heavy questions and step-by-step analysis
- Research, summarization, and document work
- Comparing DeepSeek responses against other leading AI models
Not ideal for
- High-volume casual chats where you want to conserve premium credits
- Native image generation workflows
- Prompts that require image or screenshot understanding
- Voice, speech, or audio transcription workflows
Input & Output
Accepts
Generates
Pricing
All prices are per 1 million tokens
Input
$0.27/M
Output
$0.95/M
Cache Read
$0.13/M
Capabilities
- Natural language understanding and generation
- Long context window for extended conversations
Example Prompts
Review this TypeScript function for edge cases, bugs, and simpler implementation options.
Turn this product requirement into a small implementation plan with tests.
Solve this problem step by step, then summarize the final answer in one paragraph.
Summarize these notes into key findings, risks, and recommended next steps.
Compare how DeepSeek V3.1 Terminus and two other models answer this prompt.
Supported Parameters
frequency_penaltyinclude_reasoninglogit_biasmax_tokensmin_ppresence_penaltyreasoningrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_ktop_pCompare and Use DeepSeek V3.1 Terminus
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Frequently Asked Questions
Try DeepSeek V3.1 Terminus In Related Workflows
Model pages work best when they connect to real tasks. Use these bots and utilities to test DeepSeek V3.1 Terminus against coding, research, and model-selection workflows.
Use DeepSeek V3.1 Terminus on RyddleAI
Access DeepSeek V3.1 Terminus with a RyddleAI subscription.
Compare DeepSeek V3.1 Terminus With Alternatives
Use these nearby models to test whether DeepSeek V3.1 Terminus is the right choice for your prompt, budget, and model family preference.
| Alternative | Provider | Tier | Why compare | Page |
|---|---|---|---|---|
| DeepSeek V4 Pro | Deepseek | Premium | Another DeepSeek model to compare within the same provider family | View model |
| DeepSeek V4 Flash | Deepseek | Free | Another DeepSeek model to compare within the same provider family | View model |
| Qwen3.7 Max | Qwen | Premium | Same tier alternative from another provider | View model |
| Grok Build 0.1 | X-ai | Premium | Same tier alternative from another provider | View model |