OpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
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CalcForge records 32,924 monthly visits with +30.4% month-over-month growth and Free pricing. DeepSeek records 372,761,591 monthly visits with +4.3% growth and Freemium pricing.

Open-source engineering calculators and collaboration platform for civil, mechanical, and electrical professionals.
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | calcforge.com | deepseek.com |
| Pricing Model | Free | Freemium |
| Monthly Visits | 32.92K (32,924) | 372.76M (372,761,591) |
| MoM Traffic Delta |
| +7.67K (+30.4%) |
| +15.36M (+4.3%) |
| Primary Market & Share | 🇺🇸 United States (13.3%) | 🇨🇳 China (50.5%) |
|---|
| Direct Visits / mo | 13.36K | 291.59M |
|---|
| User Rating | 5 | 3.8 |
|---|
| Supported Platforms | Website | Website |
|---|

Open-source engineering calculators and collaboration platform for civil, mechanical, and electrical professionals.

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.
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