DeepSeek V3.1 vs o4 Mini Deep Research (Comparative Analysis)
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Comparative Analysis: DeepSeek V3.1 vs. o4 Mini Deep Research
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Overview
DeepSeek V3.1 was released 1 month before o4 Mini Deep Research.
 DeepSeek V3.1 |  o4 Mini Deep Research | |
|---|---|---|
Model Provider The organization behind this AI's development | DeepSeek | OpenAI |
Input Context Window Maximum input tokens this model can process at once | 163.8K tokens | 200K tokens |
Output Token Limit Maximum output tokens this model can generate at once | 32.8K tokens | 100K tokens |
Release Date When this model first became publicly available | August 21, 2025 11 months ago August 21st, 2025 | October 10, 2025 9 months ago October 10th, 2025 |
Knowledge Cutoff Latest training-data date reported by the provider | March 31, 2025 | Not reported |
Capabilities & Features
Compare supported features, modalities, and advanced capabilities
DeepSeek V3.1 | o4 Mini Deep Research | |
|---|---|---|
Input Types Supported input formats | 📝Text | 📁File🖼️Image📝Text |
Reasoning Controls Defaults and configurable reasoning effort | Optional | Optional |
Output Types Supported output formats | 📝Text | 📝Text |
Tokenizer Text encoding system | DeepSeek | GPT |
Key Features Advanced capabilities | ✓Function Calling✓Structured Output✓Reasoning ModeContent Moderation | ✓Function Calling✓Structured Output✓Reasoning Mode✓Content Moderation |
Open Source Model availability | Available on HuggingFace → | Proprietary |
Pricing
DeepSeek V3.1 is roughly 0.1x less expensive compared to o4 Mini Deep Research for input tokens and roughly 0.1x less expensive for output tokens.
| DeepSeek V3.1 | o4 Mini Deep Research | |
|---|---|---|
Input Token Cost Cost per million input tokens | $0.25 per million tokens | $2.00 per million tokens |
Output Token Cost Cost per million output tokens | $0.95 per million tokens | $8.00 per million tokens |
Web Search Cost Additional cost for each web search operation | Not specified | $0.01 per search |
Cache Read Cost Cost to reuse cached input tokens | $0.13 per million tokens | $0.50 per million tokens |
Benchmarks
Compare relevant benchmarks between DeepSeek V3.1 and o4 Mini Deep Research.
| DeepSeek V3.1 | o4 Mini Deep Research | |
|---|---|---|
Best Design Arena Score Highest human-preference Elo score across design arenas | 1,150 Elo (#72 in Website (48.0% win rate)) | Benchmark not available. |
At a Glance
Quick overview of what makes DeepSeek V3.1 and o4 Mini Deep Research unique.
DeepSeek V3.1 by DeepSeek can use external tools and APIs, offers advanced reasoning, generates structured data. It can handle standard conversations with its 163.8K token context window. Very affordable at $0.25/M input and $0.95/M output tokens. Released August 21st, 2025.o4 Mini Deep Research by OpenAI understands both text and images, can use external tools and APIs, offers advanced reasoning, generates structured data. It can handle standard conversations with its 200K token context window. Reasonably priced at $2.00/M input and $8.00/M output tokens. Includes built-in content moderation for safer outputs. Released October 10th, 2025.Explore More Comparisons
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Compare o4 Mini Deep Research with:
🚀Programming
Best models for coding and development
🎨Creative & Roleplay
Models optimized for creative writing
📢Marketing
Content creation and marketing tasks
💻Technology
Technical analysis and explanations
🔬Science
Scientific research and analysis
🌐Translation
Multilingual translation tasks