# DeepSeek vs Overleaf Copilot

DeepSeek records 372,761,591 monthly visits with +4.3% month-over-month growth and Freemium pricing. Overleaf Copilot records 0 monthly visits with — growth and Freemium pricing.

| Metric | [DeepSeek](https://openaitools.app/tool/deepseek) | [Overleaf Copilot](https://openaitools.app/tool/overleaf-copilot) |
| :--- | :--- | :--- |
| Website URL | https://www.deepseek.com | https://chromewebstore.google.com/detail/overleaf-copilot/eoadabdpninlhkkbhngoddfjianhlghb |
| Categories | Large Language Models (LLMs), Open Source AI Models, AI API, AI Chatbot | AI Writing Assistants, AI Writing, AI Research Papers, Large Language Models (LLMs) |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 372,761,591 | 0 |
| MoM Growth Rate | +4.3% | — |
| Primary Market | China | Global |
| Direct Visits | 291,585,405 | 0 |
| Review Score | 4.8 | 4.4 |
| Saved Count | 44 | 0 |
| Supported Platforms | Website | Browser Extension |

## DeepSeek

DeepSeek (Hangzhou DeepSeek Artificial Intelligence Co., Ltd.) is a frontier AI research organization that disrupted the global LLM market by pairing open-weight transparency with breakthrough Mixture-of-Experts (MoE) and reinforcement-learning reasoning efficiency. Following the landmark releases of DeepSeek-V3 and the peer-reviewed DeepSeek-R1 reasoning model, DeepSeek introduced the DeepSeek-V4 generation in 2026—featuring a hybrid attention architecture and a native 1-million-token context window across DeepSeek-V4-Pro (1.6T total parameters, 49B active per token) and DeepSeek-V4.1-Flash (284B total parameters, 13B active per token).

Users can interact with DeepSeek in three ways: completely free through the consumer web portal (chat.deepseek.com) and mobile apps with one-click toggles for deep thinking and live web search; via DeepSeek's hosted, OpenAI-compatible developer API; or by self-hosting DeepSeek's open-weight checkpoints (including V3, R1, Prover-V2, and distilled Qwen/Llama variants) on private infrastructure. The models excel at competitive mathematics, algorithm design, repository-level software engineering, and structured data extraction, with automatic context caching on the API that slashes repeated prompt costs by over 95%.

In late 2026, DeepSeek remains the price-performance benchmark for developers and automation workflows. While the consumer chat interface remains free without a mandatory $20/month subscription tier, the developer API transitioned in late 2026 to two primary endpoints—`deepseek-flash` and `deepseek-v4-pro`—with time-of-day pricing. Off-peak API calls cost just $0.15 per million input tokens ($0.003 on cache hits) and $0.60 per million output tokens on Flash, and $0.66 input / $1.98 output on V4-Pro, making it a fraction of the cost of comparable Western frontier models.

**Pricing & Plans:** Free web and mobile chat app at chat.deepseek.com; pay-as-you-go OpenAI-compatible API with off-peak rates at $0.15/1M input ($0.003 cache hit) and $0.60/1M output for deepseek-flash (V4.1-Flash), and $0.66/1M input ($0.022 cache hit) and $1.98/1M output for deepseek-v4-pro (peak weekday UTC hours bill at 2x).

- **DeepSeek-V4 Hybrid Attention & 1M Context:** Leverages a sparse Mixture-of-Experts architecture (49B active parameters out of 1.6T on V4-Pro) to process up to 1 million tokens with minimal latency and memory overhead.
- **Transparent Chain-of-Thought Reasoning:** Pioneered by DeepSeek-R1 and integrated into V3.2 and V4 thinking modes, exposing step-by-step self-verification for complex math, logic, and code debugging.
- **Automatic Context Caching & Off-Peak API Pricing:** Drops input token costs to $0.003/1M on Flash and $0.022/1M on V4-Pro for cache hits, with 50% lower rates during off-peak UTC hours.
- **Free Consumer Web & Mobile Assistant:** Provides free access at chat.deepseek.com and on iOS/Android with document uploads, reasoning mode, and web search without paywalling core models.
- **Open-Weight Ecosystem & Self-Hosting Freedom:** Offers open weights for DeepSeek-V3, R1, Distill variants, and Prover models on Hugging Face and GitHub so enterprises can deploy within air-gapped environments.

**Strengths:** Completely free consumer web and mobile app with deep reasoning and web search included; Ultra-low API token rates ($0.15/$0.60 on Flash, $0.66/$1.98 on V4-Pro off-peak) with up to 98% savings on cached inputs; Drop-in OpenAI API compatibility makes switching or routing between models effortless; Strong open-weight lineage allows teams to self-host or fine-tune models without vendor lock-in

**Limitations:** Hosted API and web app store data on servers in China, prompting compliance restrictions for some Western enterprises and government agencies; Peak-hour API pricing (01:00–04:00 and 06:00–10:00 UTC on weekdays) doubles per-token costs compared to off-peak rates; Lacks native voice mode, video generation, and productivity suite integrations offered by ChatGPT and Google Gemini

[Profile (Markdown)](https://openaitools.app/tool/deepseek.md)

## Overleaf Copilot

Overleaf Copilot solves a very specific friction: academic writers who want ChatGPT's help with their prose, but not the copy-paste loop of opening a chat window, pasting a prompt, pasting their paragraph and pasting the result back into the LaTeX source. The extension attaches a panel to the Overleaf editor, so polishing, grammar checking and translation happen on the text you have selected, in the context of the project you are already working in.

The feature set is aimed squarely at research writing. Besides general polishing, it can follow a stated revision instruction, offers a library of academic prompts that can be shared with colleagues, provides writing suggestions for improving a draft, and handles translation with an academic register rather than a conversational one. Results are written straight to the clipboard, and both shortcuts and panel layout are configurable so the tool can fit different writing habits.

It is important to be clear about what this is: an independent third-party extension developed by a small team of computer science students, not an official Overleaf product. The developers say user content is not stored and merely passed through to the model. The free tier requires the user's own OpenAI API key, while paid tiers supply access to GPT-3.5 or GPT-4 directly. It reports around 4,000 Chrome users and a 4.8 rating across 22 reviews, and is used at 50+ universities according to the vendor.

**Pricing & Plans:** Freemium with a free trial: the Free plan costs nothing forever and uses your own OpenAI API key with practical default agents and prompts. Premium is about $3.9 (¥24.9) per 30 days for unlimited GPT-3.5 and unlimited agents, and Premium+ is about $9.9 (¥59.9) per 30 days for GPT-4 access. Payment runs through Stripe with card, Alipay and WeChat Pay support, and team licences are available on request.

- **One-click academic polishing:** Select a passage and have ChatGPT revise it in place, with the option to state the specific revisions you want.
- **Bilingual grammar checking:** Checks grammar in both English and Chinese, useful for authors writing in a second language.
- **Academic-style translation:** Translates text while preserving academic register and discipline-specific terminology rather than producing generic output.
- **Prompt library and custom prompts:** A library of curated academic prompts that you can browse, reuse and share, plus fully custom prompts for your own style.
- **Shortcuts, layout and clipboard automation:** Assign keyboard shortcuts to each function, adjust the interface layout and have results copied to the clipboard automatically.

**Strengths:** Removes the copy-paste step between ChatGPT and the LaTeX editor; Free tier works with your own OpenAI API key, so there is no mandatory spend; Academic prompt library plus fully custom prompts and shortcuts; Reports 4.8 stars from 22 ratings and use across 50+ universities

**Limitations:** Requires a paid tier or your own API key to get the most useful models; Only works inside Overleaf, so it is useless for other LaTeX setups or Word documents; Unofficial third-party tool, so long-term maintenance depends on a small independent team; Not intended for use in exams or where AI assistance is disallowed

[Profile (Markdown)](https://openaitools.app/tool/overleaf-copilot.md)

## Frequently Asked Questions

### How do DeepSeek and Overleaf Copilot compare in monthly traffic?

DeepSeek has 372,761,591 monthly visits, while Overleaf Copilot has 0. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

DeepSeek has a month-over-month growth rate of +4.3%; Overleaf Copilot has —.

### How does pricing compare?

DeepSeek: Freemium. Free web and mobile chat app at chat.deepseek.com; pay-as-you-go OpenAI-compatible API with off-peak rates at $0.15/1M input ($0.003 cache hit) and $0.60/1M output for deepseek-flash (V4.1-Flash), and $0.66/1M input ($0.022 cache hit) and $1.98/1M output for deepseek-v4-pro (peak weekday UTC hours bill at 2x). Overleaf Copilot: Freemium. Freemium with a free trial: the Free plan costs nothing forever and uses your own OpenAI API key with practical default agents and prompts. Premium is about $3.9 (¥24.9) per 30 days for unlimited GPT-3.5 and unlimited agents, and Premium+ is about $9.9 (¥59.9) per 30 days for GPT-4 access. Payment runs through Stripe with card, Alipay and WeChat Pay support, and team licences are available on request.

## Alternatives

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [ChatGPT](https://openaitools.app/tool/chatgpt-4) | 6,048,022,723 | +2.2% | Freemium | Provides stronger multi-modal reasoning and agentic tools, but lacks DeepSeek's ultra-low-cost API pricing. | [.md](https://openaitools.app/tool/chatgpt-4.md) |
| 2 | [Google Gemini](https://openaitools.app/tool/gemini-gemini-advanced) | 2,637,398,242 | -0.1% | Freemium | Offers an enormous context window and deep Google ecosystem integration, but feels less specialized for pure reasoning tasks. | [.md](https://openaitools.app/tool/gemini-gemini-advanced.md) |
| 3 | [Claude](https://openaitools.app/tool/claude-2) | 1,253,439,413 | +23.8% | Freemium | Delivers superior long-form coding artifacts and nuanced writing, but lacks DeepSeek's specialized open-weight reasoning models. | [.md](https://openaitools.app/tool/claude-2.md) |
| 4 | [Grok](https://openaitools.app/tool/grok) | 203,846,050 | -0.8% | Freemium | Features real-time X social data integration, but is less cost-effective for dedicated developer coding workflows. | [.md](https://openaitools.app/tool/grok.md) |
| 5 | [Perplexity](https://openaitools.app/tool/perplexity-ai) | 88,310,223 | -3.7% | Freemium | Real-time AI answer engine and research workspace combining live web citations with frontier reasoning models. | [.md](https://openaitools.app/tool/perplexity-ai.md) |
| 6 | [Grammarly](https://openaitools.app/tool/grammarly) | 58,867,412 | -1.5% | Freemium | Cross-platform AI writing assistant delivering real-time grammar correction, tone alignment, authorship tracking, and team style guides. | [.md](https://openaitools.app/tool/grammarly.md) |
| 7 | [QuillBot Paraphraser](https://openaitools.app/tool/quillbot-paraphraser) | 36,630,337 | +2.3% | Freemium | Paraphrase, proofread and summarize text with an AI writing workspace | [.md](https://openaitools.app/tool/quillbot-paraphraser.md) |
| 8 | [Qwen 4 (Alibaba Qwen4)](https://openaitools.app/tool/qwen-4) | 35,101,353 | -6.2% | Freemium | Provides comparable open-weight foundation models and multilingual performance, but requires self-hosting or third-party inference setup. | [.md](https://openaitools.app/tool/qwen-4.md) |
| 9 | [Cursor](https://openaitools.app/tool/cursor) | 23,297,751 | +8.4% | Freemium | The AI coding agent for building ambitious software | [.md](https://openaitools.app/tool/cursor.md) |
| 10 | [Kimi AI](https://openaitools.app/tool/kimi-chat) | 19,632,261 | -23.4% | Free | Excels at ultra-long document analysis and research, but lacks the same level of open-weight developer community support. | [.md](https://openaitools.app/tool/kimi-chat.md) |

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Source: https://openaitools.app/compare/deepseek-vs-overleaf-copilot

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