The AI developer cloud for GPU pods, serverless inference and clustering
Code Arena records 35,827,928 monthly visits with +19.4% month-over-month growth and Free pricing. Lightning AI (Grid.ai) records 10,313 monthly visits with -1.8% growth and Usage-based / Contact for Pricing pricing.

On-demand GPU cloud and enterprise AI infrastructure from the creators of PyTorch Lightning.
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | arena.ai | grid.ai |
| Pricing Model | Free | Usage-based / Contact for Pricing |
| Monthly Visits | 35.83M (35,827,928) | 10.31K (10,313) |
| MoM Traffic Delta | +5.83M (+19.4%) | -192 (-1.8%) |
| Primary Market & Share | 🇮🇳 India (13.1%) | 🇺🇸 United States (50.5%) |
| Direct Visits / mo | 24.34M | 4.11K |
| User Rating | 4.7 | 4.4 |
| Supported Platforms | Website | Website |

Battle-test AI coding models side by side
Send the same coding prompt to multiple leading models and compare their generated apps and logic side by side.
Watch models construct web apps and websites live, so you can see process and output, not just the final file.
Projects go beyond one-off snippets, testing how well a model structures components, routes, and styles together.
Track which coding models accumulate the most wins over time to identify consistently strong performers.

On-demand GPU cloud and enterprise AI infrastructure from the creators of PyTorch Lightning.
Self-serve access to H200, B200, H100, A100 and L4 GPUs with guaranteed availability and no long-term contracts.
Code, debug, and refine models in the browser or over SSH on cloud GPUs, with shared studio environments for teams.
Run hundreds of experiments concurrently, compare runs, and scale to large multi-node GPU clusters for pretraining.
SSO, role-based access, audit logs, fine-grained data controls, SOC2 and HIPAA alignment, plus private cloud and VPC deployment.
The AI developer cloud for GPU pods, serverless inference and clustering
Rent cloud GPUs by the second from a global marketplace
Rent cloud GPUs by the second from a global marketplace
Free / Open-sourceServerless cloud infrastructure for AI and data workloads
Free / Open-sourceServerless cloud infrastructure for AI and data workloads
An AI-native cloud built from silicon to API for training, tuning, and serving models
An AI-native cloud built from silicon to API for training, tuning, and serving models

Crowdsourced arena where AI models compete and humans crown the best design output
Crowdsourced arena where AI models compete and humans crown the best design output

Free / Open-sourceDistributed GPU cloud that orchestrates the world's idle consumer GPUs
Free / Open-sourceDistributed GPU cloud that orchestrates the world's idle consumer GPUs

Agent Skills that give your coding agent real design taste
Agent Skills that give your coding agent real design taste
Free / Open-sourceSearch and study millions of public SKILL.md agent skills
Free / Open-sourceSearch and study millions of public SKILL.md agent skills

Free AI hackathons and a global community for AI builders
Free AI hackathons and a global community for AI builders
Free / Open-sourceThe AI cloud built by the creators of PyTorch Lightning
Free / Open-sourceThe AI cloud built by the creators of PyTorch Lightning

Gigawatt-scale AI compute, built and operated end to end
Community plugin, rule, and MCP server hub for Cursor
Community plugin, rule, and MCP server hub for Cursor