
Provides stronger multi-modal reasoning and agentic tools, but lacks DeepSeek's ultra-low-cost API pricing.
Provides stronger multi-modal reasoning and agentic tools, but lacks DeepSeek's ultra-low-cost API pricing.
ChatKit records 3,846 monthly visits with -12.2% month-over-month growth and Paid pricing. DeepSeek records 372,761,591 monthly visits with +4.3% growth and Freemium pricing.

A refined ChatGPT interface powered by your own API key
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | chatkit.app | deepseek.com |
| Pricing Model | Paid | Freemium |
| Monthly Visits | 3.85K (3,846) | 372.76M (372,761,591) |
| MoM Traffic Delta | -534 (-12.2%) | +15.36M (+4.3%) |
| Primary Market & Share | 🌐 Global (—) | 🇨🇳 China (50.5%) |
| Direct Visits / mo | 1.51K | 291.59M |
| User Rating | 4.3 | 4.8 |
| Supported Platforms | Website | Website |

A refined ChatGPT interface powered by your own API key
Connect your own OpenAI API key so you control model choice, spend and data flow rather than paying a bundled subscription.
Responses stream token by token, keeping long conversations responsive and easy to follow.
Save reusable prompts so repetitive tasks take one click instead of retyping the same instructions.
Dictate prompts by voice and bookmark the conversations or answers you want to return to.
High-efficiency open-weight and hosted reasoning AI powered by DeepSeek-V4 and R1 at ultra-low token costs.
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.
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.
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.
Provides free access at chat.deepseek.com and on iOS/Android with document uploads, reasoning mode, and web search without paywalling core models.

Provides stronger multi-modal reasoning and agentic tools, but lacks DeepSeek's ultra-low-cost API pricing.
Provides stronger multi-modal reasoning and agentic tools, but lacks DeepSeek's ultra-low-cost API pricing.

Offers an enormous context window and deep Google ecosystem integration, but feels less specialized for pure reasoning tasks.
Offers an enormous context window and deep Google ecosystem integration, but feels less specialized for pure reasoning tasks.
Delivers superior long-form coding artifacts and nuanced writing, but lacks DeepSeek's specialized open-weight reasoning models.
Delivers superior long-form coding artifacts and nuanced writing, but lacks DeepSeek's specialized open-weight reasoning models.

Features real-time X social data integration, but is less cost-effective for dedicated developer coding workflows.
Features real-time X social data integration, but is less cost-effective for dedicated developer coding workflows.
SpecialistReal-time AI answer engine and research workspace combining live web citations with frontier reasoning models.
SpecialistReal-time AI answer engine and research workspace combining live web citations with frontier reasoning models.

Free / Open-sourceProvides comparable open-weight foundation models and multilingual performance, but requires self-hosting or third-party inference setup.
Free / Open-sourceProvides comparable open-weight foundation models and multilingual performance, but requires self-hosting or third-party inference setup.

SpecialistThe AI coding agent for building ambitious software
SpecialistThe AI coding agent for building ambitious software

SpecialistExcels at ultra-long document analysis and research, but lacks the same level of open-weight developer community support.
SpecialistExcels at ultra-long document analysis and research, but lacks the same level of open-weight developer community support.
Free / Open-sourceEnables running open-source models locally on consumer hardware, but lacks DeepSeek's cloud-scale hosted reasoning power.
Free / Open-sourceEnables running open-source models locally on consumer hardware, but lacks DeepSeek's cloud-scale hosted reasoning power.

Free / Open-sourceOne app to chat with GPT, Claude, Gemini and hundreds of other AI models
Free / Open-sourceOne app to chat with GPT, Claude, Gemini and hundreds of other AI models

Free / Open-sourceChat with 30+ leading AI models in one clean, fast workspace
Free / Open-sourceChat with 30+ leading AI models in one clean, fast workspace

Free / Open-sourceBuild, deploy, and govern production-ready agentic AI workflows
Free / Open-sourceBuild, deploy, and govern production-ready agentic AI workflows