Anthropic vs StreamLake

StreamLake's KAT-Coder-Pro V2.5 plugs into Claude Code through a Claude-protocol proxy and sells on a coding plan. It targets Claude's core use at lower cost, with China data residency.

By The Subconscious Team · Updated September 30, 2026

Anthropic vs StreamLake: key differences

StreamLake, the AI cloud brand of Kuaishou, aims its headline model at Anthropic's core market. KAT-Coder-Pro V2.5 is a proprietary agentic coding model that StreamLake says was trained with large-scale agentic reinforcement learning to handle repository-level work: reading an issue, changing multiple files, running tests and fixing its own errors. A Claude-protocol proxy drops it into Claude Code or OpenClaw, and developers can pay per token or buy a KwaiKAT Coding Plan. Anthropic's Claude models are closed as well, with top SWE-bench Pro results and a 1M window on the larger tiers.

Procurement likely settles this more than capability does. StreamLake's pricing and much of its documentation lead with China and yuan, and its data residency in China rules it out for many US and EU enterprise buyers. KAT-Coder's training claims come from StreamLake itself. Anthropic sells through its API, Bedrock, Vertex AI and Microsoft Foundry. Developers after low-cost agentic coding on a subscription, and Chinese internet businesses wanting domestic MaaS and bare metal, fit StreamLake. Western enterprise coding teams fit Claude.

What Anthropic and StreamLake do

Anthropic

Anthropic sells the Claude family of closed models through its own API, Amazon Bedrock, Google Vertex AI and Microsoft Foundry. The public lineup today runs from Claude Fable 5.1 at the top, released September 1, 2026, through the Opus and Sonnet tiers down to Haiku 4.5. List prices span a tenfold range, from $10 in and $50 out on Fable to $1 in and $5 out on Haiku. The top three tiers include a 1M token context window at standard pricing with no surcharge past 200K.

Example models: Claude Fable 5.1, Claude Haiku 4.5

Full Anthropic profile

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.

Example models: KAT-Coder-Pro V2.5, KAT-Coder-Air

Full StreamLake profile

Should you choose Anthropic or StreamLake?

Anthropic

Choose Anthropic for

US and EU enterprises that need data outside China
Coding agents backed by published benchmark results
Procurement through major Western clouds

StreamLake

Choose StreamLake for

Low-cost agentic coding on a subscription plan
Chinese businesses wanting domestic MaaS and bare metal
Trying Kuaishou's coding model inside Claude Code

Anthropic vs StreamLake at a glance

Attribute	Anthropic	StreamLake
Model access	Closed	Proprietary coding models
Flagship models	Claude Fable 5.1, Opus, Sonnet, Haiku 4.5	KAT-Coder-Pro V2.5, KAT-Coder-Air
Speed	Fable is the slowest tier	Unknown
Price	$1–$10 in, $5–$50 out per 1M	Per token or KwaiKAT Coding Plan
Customization	N/A	Unknown
Deployment	API, Bedrock, Vertex AI, Microsoft Foundry	MaaS API, bare metal
Long context	1M, no surcharge past 200K	Unknown

Frequently asked questions

What is the difference between Anthropic and StreamLake?

StreamLake's KAT-Coder-Pro V2.5 plugs into Claude Code through a Claude-protocol proxy and sells on a coding plan. It targets Claude's core use at lower cost, with China data residency.

When should I choose Anthropic over StreamLake?

US and EU enterprises that need data outside China; Coding agents backed by published benchmark results; Procurement through major Western clouds.

When should I choose StreamLake over Anthropic?

Low-cost agentic coding on a subscription plan; Chinese businesses wanting domestic MaaS and bare metal; Trying Kuaishou's coding model inside Claude Code.

Is Anthropic or StreamLake cheaper?

Anthropic: $1–$10 in, $5–$50 out per 1M. StreamLake: Per token or KwaiKAT Coding Plan. The cheaper choice depends on the model and workload.

Related comparisons

Running long-horizon agents?

If your agents run past 200K tokens, compare both against Subconscious. Our inference stack treats a long-horizon trace as the primary workload, so speed, cost, and accuracy hold up deep into the trace.

Subconscious vs Anthropic Subconscious vs StreamLake