# DeepSeek vs Lex

DeepSeek records 372,761,591 monthly visits with +4.3% month-over-month growth and Freemium pricing. Lex records 24,323 monthly visits with -57.1% growth and Freemium pricing.

| Metric | [DeepSeek](https://openaitools.app/tool/deepseek) | [Lex](https://openaitools.app/tool/lex) |
| :--- | :--- | :--- |
| Website URL | https://www.deepseek.com | https://lex.page |
| Categories | Large Language Models (LLMs), Open Source AI Models, AI API, AI Chatbot | AI Writing, AI Writing Assistants, AI Copilot, AI Rewriter |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 372,761,591 | 24,323 |
| MoM Growth Rate | +4.3% | -57.1% |
| Primary Market | China | United States |
| Direct Visits | 291,585,405 | 14,650 |
| Review Score | 4.8 | 1.8 |
| Saved Count | 44 | 0 |
| Supported Platforms | Website | Website |

## 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)

## Lex

Lex is built around a simple premise: the editor should stay out of the way while the AI does useful work at the moment you need it. The interface is deliberately minimal and keyboard-driven, so you write in a distraction-free document rather than assembling blocks in a page builder. Sitting alongside the text is an AI layer that can critique your draft, brainstorm directions, rewrite a sentence or paragraph, and generate title ideas on demand.

For anything longer than a quick note, Lex behaves like a proper collaborative document tool. You can share a link so a collaborator logs in with a single click and types alongside you, leave comments navigated by keyboard shortcuts, and switch between versions to try a different phrasing without losing what you had. Publishing sends a read-only link for readers, and mobile web access means a shared link works without anyone installing an app.

One practical note for anyone evaluating it today: Lex currently displays a notice stating it is no longer accepting new customers, while existing accounts continue to work as usual. If you are already using Lex, the product is operational. If you are new, you may not be able to sign up right now.

**Pricing & Plans:** Lex has operated on a freemium model with free and paid tiers; the site currently states it is no longer accepting new customers, so new signups may not be available. Existing accounts keep working and pricing details remain published on the site.

- **AI feedback on your draft:** Ask the built-in assistant to critique a passage, brainstorm alternatives or rewrite something, without leaving the document.
- **One-click commands:** Keyboard-driven AI shortcuts find the better word, expand a bullet into prose or generate a list of ideas in place.
- **Comments and versions:** Threaded comments navigated by shortcut plus saved versions, so you can try a different way of saying something without losing the original.
- **Live collaboration and publishing:** Share a link for one-click co-editing in real time, or send a read-only link so others can simply read the finished piece.
- **Title generation:** Request a batch of title options from the AI and pick the strongest headline instead of agonising over the first line.

**Strengths:** Genuinely minimal, keyboard-first editor that stays out of the way of writing; AI assistance is embedded in the document rather than living in a separate chat window; Proper collaboration features: live co-editing, comments, versions and read-only publishing links; Works on mobile web through a shared link, so collaborators install nothing

**Limitations:** The site currently states Lex is no longer accepting new customers, so new users may be unable to sign up; Track changes was still listed as coming soon, so review workflows are less complete than a full office suite; AI features focus on wording and feedback rather than deep research or data analysis

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

## Frequently Asked Questions

### How do DeepSeek and Lex compare in monthly traffic?

DeepSeek has 372,761,591 monthly visits, while Lex has 24,323. 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%; Lex has -57.1%.

### 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). Lex: Freemium. Lex has operated on a freemium model with free and paid tiers; the site currently states it is no longer accepting new customers, so new signups may not be available. Existing accounts keep working and pricing details remain published on the site.

## 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 | [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) |
| 7 | [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) |
| 8 | [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) |
| 9 | [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) |
| 10 | [Ollama](https://openaitools.app/tool/ollama) | 9,421,973 | +4.3% | Free, Freemium, Paid | Enables running open-source models locally on consumer hardware, but lacks DeepSeek's cloud-scale hosted reasoning power. | [.md](https://openaitools.app/tool/ollama.md) |

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Source: https://openaitools.app/compare/deepseek-vs-lex

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