Free / Open-sourceDelivers exceptional open-weight reasoning performance at very low cost, but lacks BigModel's broad enterprise multi-modal agent building suite.

BigModel records 5,700,686 monthly visits with -17% month-over-month growth and Freemium pricing. CometAPI records 602,966 monthly visits with +49.7% growth and Pay-as-you-go (credits) pricing.

One OpenAI-compatible API key for 500+ AI models
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | bigmodel.cn | cometapi.com |
| Pricing Model | Freemium | Pay-as-you-go (credits) |
| Monthly Visits | 5.7M (5,700,686) | 602.97K (602,966) |
| MoM Traffic Delta |
| -1.17M (-17%) |
| +200.26K (+49.7%) |
| Primary Market & Share | 🇨🇳 China (85.8%) | 🇮🇳 India (23.4%) |
|---|
| Direct Visits / mo | 4.23M | 89.15K |
|---|
| User Rating | 4.6 | 4 |
|---|
| Supported Platforms | Website | Website |
|---|

Zhipu AI's open platform for GLM large models, multimodal APIs, and agent building
Unified access to GLM large language models plus vision, OCR, speech, image, and video endpoints through one account.
Build tool-using agents and expose or consume MCP services to connect models to external systems.
Create managed knowledge bases and retrieval pipelines so models can answer with your own documents.
Tune models on your data and prototype prompts interactively in the browser before shipping.

One OpenAI-compatible API key for 500+ AI models
Replace separate OpenAI, Anthropic and Google credentials with a single key and switch models by changing one line of code.
Route text, reasoning, coding, image, audio and video workloads through one OpenAI-compatible base URL without rewriting your app.
Line-item pricing per model with discounts below official vendor rates, pay-as-you-go with no monthly subscription or minimum spend.
A real-time dashboard tracks spend, latency and call volume so you can set budget alerts and compare models side by side.
Free / Open-sourceDelivers exceptional open-weight reasoning performance at very low cost, but lacks BigModel's broad enterprise multi-modal agent building suite.


Provides industry-leading frontier intelligence and developer ecosystems, but lacks BigModel's specialized GLM architecture and native Chinese language optimizations.

SpecialistGoogle's rapid prototyping IDE and developer API workbench for building multimodal applications with Gemini models.
#3Industry-leading model router with transparent pricing and broad provider support, but lacks Comet's specific bundled discounts.

SpecialistExcels at serverless generation of media models like images and video, but is less focused on general LLM routing.

SpecialistSpecializes in high-performance serverless inference for open-source models, but offers fewer proprietary commercial model options.

Run, fine-tune, and deploy machine learning models with one line of code
Offers unified access to multimodal language and media models, but focuses more heavily on generation infrastructure.
Delivers ultra-fast inference speeds for open-weight models, but focuses less on proprietary enterprise agent building toolkits than BigModel.

Free / Open-sourceOpen-source proxy and SDK that standardizes multi-provider LLM calls, but requires self-hosting or manual infrastructure setup.


Free / Open-sourceOffers highly cost-effective serverless inference for open models, but lacks BigModel's integrated enterprise knowledge base and agent tools.

One API for LLM, image, video, and audio models in production
Free / Open-sourceDelivers exceptional open-weight reasoning performance at very low cost, but lacks BigModel's broad enterprise multi-modal agent building suite.
Provides industry-leading frontier intelligence and developer ecosystems, but lacks BigModel's specialized GLM architecture and native Chinese language optimizations.
SpecialistGoogle's rapid prototyping IDE and developer API workbench for building multimodal applications with Gemini models.
Industry-leading model router with transparent pricing and broad provider support, but lacks Comet's specific bundled discounts.
SpecialistExcels at serverless generation of media models like images and video, but is less focused on general LLM routing.
SpecialistSpecializes in high-performance serverless inference for open-source models, but offers fewer proprietary commercial model options.
Run, fine-tune, and deploy machine learning models with one line of code
Offers unified access to multimodal language and media models, but focuses more heavily on generation infrastructure.
One API for LLM, image, video, and audio models in production