Subconscious
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Subconscious vs DeepSeek

Same DeepSeek V4.1 Flash, different runtime. DeepSeek's API is cheapest per token on short calls. Subconscious runs past its 1M window and keeps data out of China.

By The Subconscious Team · Updated

Subconscious vs DeepSeek: key differences

This is the rare pair where the same model sits on both sides. DeepSeek's own API serves V4.1 Flash with a 1M context and 384K max output at $0.30 in and $1.20 out at peak, half that off-peak, with cache hits at a few cents per million or less. Subconscious serves V4.1 Flash on its managed API through a runtime built for long agents. It prunes the KV cache instead of rereading the full context, bills tokens processed after compression, and delivers a 5M+ effective context window and 2x faster task completion for its runtime. On a short request the first-party price is hard to beat. On a trace headed past 1M, Subconscious can keep going where DeepSeek's window ends.

Data location may settle it before price does. DeepSeek stores hosted API data in China, a hard stop for many enterprises, and it reprices and retires models often, which forces teams to keep rechecking cost models. Subconscious records no prompts or inputs, only usage data, and offers dedicated and on-prem deployments. DeepSeek still wins for cost-sensitive batch work scheduled into off-peak hours, and its MIT-licensed weights let teams self-host or fine-tune directly. It also serves V4 Pro, which is not on Subconscious's managed API.

What Subconscious and DeepSeek do

Subconscious

Subconscious is an MIT CSAIL spinout in Kendall Square that builds inference for long-horizon agents, the workloads where a single trace runs past 200K tokens and often into the millions. Its runtime drops in as a replacement for vLLM or SGLang. Instead of rereading an ever-growing context on every step, it prunes the KV cache and preserves suffix state, and Subconscious co-designs the runtime with post-trained model variants it calls Marathon. Against open models on standard inference, Subconscious delivers 2x faster task completion, delivers a 5M+ effective context window, cuts cost 50% and up to 80%, and scores neutral to 10% better on agentic benchmarks.

Example models: GLM 5.3, DeepSeek V4.1 Flash

Full Subconscious profile

DeepSeek

DeepSeek is the Chinese lab whose open-weight models reset price expectations for the whole market. Its API now serves two models, both with 1M context and 384K max output. V4.1 Flash shipped September 10, 2026 with built-in image understanding at $0.30 in and $1.20 out at peak. V4 Pro, generally available since August 13, costs $1.32 in and $3.96 out at peak. 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, DeepSeek V4 Pro

Full DeepSeek profile

Should you choose Subconscious or DeepSeek?

Subconscious

Choose Subconscious for

  • Running V4.1 Flash on traces past 1M tokens
  • Teams that cannot send data to China-hosted servers
  • Long agents billed on processed tokens, not tokens sent

DeepSeek

Choose DeepSeek for

  • Off-peak batch work at half the peak rate
  • Self-hosting or fine-tuning MIT-licensed weights
  • V4 Pro access and the lowest first-party token prices

Subconscious vs DeepSeek at a glance

AttributeSubconsciousDeepSeek
Model accessOpen weightsOpen weights (MIT)
Flagship modelsGLM 5.3, DeepSeek V4.1 FlashDeepSeek V4.1 Flash, V4 Pro
Speed2x faster task completion~35 tok/s on V4 Pro
Price50–80% lower cost; billed on processed tokensOff-peak hours at half price
CustomizationMarathon post-trained variantsOpen weights to fine-tune
DeploymentManaged API, dedicated, on-premFirst-party API, Hugging Face weights
Long context5M+ effective context1M, 384K max output

Frequently asked questions

What is the difference between Subconscious and DeepSeek?

Same DeepSeek V4.1 Flash, different runtime. DeepSeek's API is cheapest per token on short calls. Subconscious runs past its 1M window and keeps data out of China.

When should I choose Subconscious over DeepSeek?

Running V4.1 Flash on traces past 1M tokens; Teams that cannot send data to China-hosted servers; Long agents billed on processed tokens, not tokens sent.

When should I choose DeepSeek over Subconscious?

Off-peak batch work at half the peak rate; Self-hosting or fine-tuning MIT-licensed weights; V4 Pro access and the lowest first-party token prices.

Is Subconscious or DeepSeek cheaper?

Subconscious: 50–80% lower cost; billed on processed tokens. DeepSeek: Off-peak hours at half price. The cheaper choice depends on the model and workload.

Which has more context, Subconscious or DeepSeek?

Subconscious: 5M+ effective context. DeepSeek: 1M, 384K max output.

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Run your longest agent traces on Subconscious

Point the OpenAI or Anthropic SDK, or the coding agent you already use, at Subconscious. Keep DeepSeek for the work it does best and send the long runs to us.

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