# Google Vertex AI vs StreamLake

> Two big-company AI clouds with very different reach. Vertex serves Gemini and Claude to global enterprises; StreamLake serves Kuaishou's KAT-Coder models mainly to Chinese businesses.

Canonical: https://www.subconscious.dev/compare/google-vertex-vs-streamlake · By The Subconscious Team · Updated September 30, 2026

## How they compare

Both are AI clouds backed by large internet companies, but they aim at different buyers. StreamLake is Kuaishou's brand, drawing on the infrastructure built to serve short video at massive scale, and it sells model-as-a-service and bare-metal compute to internet businesses. Its headline model is KAT-Coder-Pro V2.5, a proprietary agentic coding model that StreamLake says was trained with large-scale agentic reinforcement learning for repository-level work. Vertex AI is Google Cloud's enterprise platform, with Gemini 3.8, Claude and 200+ models, plus training, evaluation, vector search and an agent runtime.

For most Western teams, the decision is short. StreamLake's pricing and documentation lead with China and yuan, and data residency in China rules it out for many US and EU enterprises. Vertex fits those buyers, though its pricing is fragmented. StreamLake's appeal is narrower but real: a Claude-protocol proxy lets KAT-Coder drop into Claude Code, and the KwaiKAT Coding Plan offers subscription pricing for agentic coding. Chinese internet businesses that want domestic MaaS and bare metal will find StreamLake the more natural fit.

## What each one does

### Google Vertex AI

Vertex AI is Google Cloud's enterprise AI platform. At Google Cloud Next on April 22, 2026, Google rebranded it the Gemini Enterprise Agent Platform with an agent-first structure, though the API endpoint and most docs still say Vertex. Model Garden offers 200+ models, including Google's Gemini 3.8 family, Anthropic's Claude models and open models like Gemma, alongside Imagen, Veo and Chirp for media and speech. Google's own TPUs sit underneath much of its first-party serving.

### StreamLake

StreamLake is the AI cloud brand of Kuaishou, the Chinese short-video company behind the Kling video models. It sells model-as-a-service inference and bare-metal compute to internet businesses, drawing on the infrastructure Kuaishou built to serve video at massive scale. Its developer site offers APIs, SDKs and integration guides aimed at taking teams from testing to production.

## Which is best, and when

### Choose Google Vertex AI for

- US and EU enterprises with residency requirements
- Broad model choice including Gemini and Claude
- Full MLOps and agent tooling

### Choose StreamLake for

- Agentic coding on KAT-Coder through a subscription plan
- Chinese businesses that want domestic MaaS and bare metal
- Running KAT-Coder inside Claude Code

## At a glance

| Attribute | Google Vertex AI | StreamLake |
|---|---|---|
| Model access | Closed and open, 200+ models | Proprietary coding models |
| Flagship models | Gemini 3.8 Flash, Claude, Gemma | KAT-Coder-Pro V2.5, KAT-Coder-Air |
| Speed | Flash tier built for low latency | - |
| Price | Gemini 3.8 Flash $0.75 in, $3.75 out | Per token or KwaiKAT Coding Plan |
| Customization | Custom training on GPUs or TPUs | - |
| Deployment | Managed on Google Cloud | MaaS API, bare metal |
| Long context | 1M on Gemini 3.8 Flash | - |

## FAQ

### What is the difference between Google Vertex AI and StreamLake?

Two big-company AI clouds with very different reach. Vertex serves Gemini and Claude to global enterprises; StreamLake serves Kuaishou's KAT-Coder models mainly to Chinese businesses.

### When should I choose Google Vertex AI over StreamLake?

US and EU enterprises with residency requirements; Broad model choice including Gemini and Claude; Full MLOps and agent tooling.

### When should I choose StreamLake over Google Vertex AI?

Agentic coding on KAT-Coder through a subscription plan; Chinese businesses that want domestic MaaS and bare metal; Running KAT-Coder inside Claude Code.

### Is Google Vertex AI or StreamLake cheaper?

Google Vertex AI: Gemini 3.8 Flash $0.75 in, $3.75 out. StreamLake: Per token or KwaiKAT Coding Plan. The cheaper choice depends on the model and workload.

## Running long-horizon agents?

If your agents run past 200K tokens, compare both against Subconscious: [Subconscious vs Google Vertex AI](https://www.subconscious.dev/compare/subconscious-vs-google-vertex.md), [Subconscious vs StreamLake](https://www.subconscious.dev/compare/subconscious-vs-streamlake.md).

Full profiles: [Google Vertex AI](https://www.subconscious.dev/providers/google-vertex.md), [StreamLake](https://www.subconscious.dev/providers/streamlake.md).