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Base Labs

elephant-1

Specs

Input price
On demand
Output price
On demand
Context window
16.4K tokens

Base Labs' 9B open-weight decision model - an MIT-licensed Qwen3.5-9B fine-tune built for fast, calibrated scoring of fixed question sets.

Capabilities

  • 9B parameters, full fine-tune of Qwen3.5-9B, MIT licensed
  • Typed questions (`noul`, `choice`, `score`) answered from one shared-prefix prefill
  • Brier calibration term and a trained "I don't know" option
  • Leading model under 15B on the Jev Decision Index 0.4 at 62.65
  • 16,384-token sequence limit with hard refusal, not silent truncation

Best for

  • Urgency, sentiment, duplicate-detection, and guardrail checks
  • High-volume routing where the 27B's extra knowledge is unnecessary
  • Single-GPU self-hosting if you leave the managed endpoint

Limitations to keep in mind

  • 16K context and text-only input
  • Trails mammoth-1 by 8.6 points on the Jev index
  • Decision benchmarks are not clinical validation
  • The MIT fine-tune sits on Qwen3.5 base weights with their own terms
  • Self-hosting needs a CUDA GPU and a pinned OneJev runtime

HIPAA-compliant hosting

elephant-1 is available under our HIPAA-compliant design-partner program, with a signed Business Associate Agreement (BAA), encryption in transit and at rest, and access controls. We are currently onboarding design partners, with general availability coming soon. Run the model behind a unified OpenRouter-style API and swap to another model with a single parameter. For the deployment requirements behind that, see our 2026 guide to HIPAA compliance for AI & LLM APIs.

Pricing in context

Open source models like elephant-1 can be served efficiently on optimized inference infrastructure, with savings passed through to you. Exact savings depend on the model and your volume, but open source inference is typically a fraction of the per-token cost of closed-source frontier models on Azure OpenAI or AWS Bedrock - without cloud egress lock-in or minimum commitments. See the full pricing comparison or browse the model catalog.

Related models

Design partner program

Run elephant-1 under HIPAA

Join the waitlist to be prioritized. We'll reach out with a qualification call and early access.

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