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DeepSeek vs StreamLake
Both are China-based options for budget coding. DeepSeek sells open MIT models per token; StreamLake sells Kuaishou's proprietary KAT-Coder with a coding plan and a Claude Code proxy.
By The Subconscious Team · Updated
DeepSeek vs StreamLake: key differences
DeepSeek and StreamLake share a home market but not a model strategy. DeepSeek's weights are open under MIT, and most hosts in this guide serve them, often below DeepSeek's own list. StreamLake, Kuaishou's AI cloud, sells KAT-Coder-Pro V2.5, a proprietary agentic coding model that StreamLake says was trained with large-scale agentic RL for repository-level work. Developers pay per token or buy a KwaiKAT Coding Plan, with OpenAI-protocol endpoints and a Claude-protocol proxy for Claude Code or OpenClaw. Earlier KAT-Coder versions spread through resellers like 302.AI and OpenRouter.
DeepSeek is the more general and more portable choice: 1M context, 384K output, reasoning effort settings, image understanding on V4.1 Flash, and off-peak pricing at half. Its weights can move to a US or EU host if data rules require it. StreamLake keeps data in China, which complicates Western procurement. StreamLake also sells bare-metal compute to Chinese internet businesses. Pick StreamLake for a subscription coding plan with a Claude Code proxy. Pick DeepSeek for open weights and metered general use.
What DeepSeek and StreamLake do
DeepSeek
DeepSeek is the Chinese lab whose open-weight models reset price expectations for the whole market. Its main model is V4.1 Flash, with 1M context and 384K max output, which shipped September 10, 2026 with built-in image understanding at $0.30 in and $1.20 out at peak. An updated checkpoint, V4.1-Flash-1017, replaced it on October 17 at the same price. DeepSeek had planned to route deepseek-v4-pro requests to V4.1 Flash from September 14 but reversed course, and still serves V4 Pro at $1.32 in and $3.96 out at peak until a V4.1 Pro launches. Cache hits cost a few cents per million or less, and the weights ship on Hugging Face under an MIT license.
Example models: DeepSeek V4.1 Flash
Full DeepSeek profileStreamLake
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, and its Vanchin platform also hosts third-party open models from DeepSeek and GLM, most recently DeepSeek V4.1 Flash 1017.
Example models: KAT-Coder-Pro V2.5, KAT-Coder-Air V2.5
Full StreamLake profileShould you choose DeepSeek or StreamLake?
DeepSeek
Choose DeepSeek for
- Open weights that can move to non-China hosts
- General agents with 1M context
- Metered usage with off-peak discounts
StreamLake
Choose StreamLake for
- Subscription-based agentic coding in Claude Code
- Chinese businesses wanting domestic MaaS and bare metal
- Trying Kuaishou's KAT-Coder models
DeepSeek vs StreamLake at a glance
| Attribute | DeepSeek | StreamLake |
|---|---|---|
| Model access | Open weights (MIT) | Proprietary coding models, plus hosted open models |
| Flagship models | DeepSeek V4.1 Flash | KAT-Coder-Pro V2.5, KAT-Coder-Air V2.5 |
| Speed | ~209 tok/s on V4.1 Flash | Unknown |
| Price | Off-peak hours at half price | $0.74 in, $2.96 out (Pro V2.5), or KwaiKAT Coding Plan |
| Customization | Open weights to fine-tune | Unknown |
| Deployment | First-party API, Hugging Face weights | MaaS API, bare metal |
| Long context | 1M, 384K max output | 256K |
Frequently asked questions
What is the difference between DeepSeek and StreamLake?
Both are China-based options for budget coding. DeepSeek sells open MIT models per token; StreamLake sells Kuaishou's proprietary KAT-Coder with a coding plan and a Claude Code proxy.
When should I choose DeepSeek over StreamLake?
Open weights that can move to non-China hosts; General agents with 1M context; Metered usage with off-peak discounts.
When should I choose StreamLake over DeepSeek?
Subscription-based agentic coding in Claude Code; Chinese businesses wanting domestic MaaS and bare metal; Trying Kuaishou's KAT-Coder models.
Is DeepSeek or StreamLake cheaper?
DeepSeek: Off-peak hours at half price. StreamLake: $0.74 in, $2.96 out (Pro V2.5), or KwaiKAT Coding Plan. The cheaper choice depends on the model and workload.
Which has more context, DeepSeek or StreamLake?
DeepSeek: 1M, 384K max output. StreamLake: 256K.
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