Your LLM is wrong sometimes. Fix it.

Inference API for 30+ models, including Opus 4.7 and GPT 5.5, that actually learns from your production traffic and gets smarter every week

Deploy a model in 4 minutes

INTRODUCING ADAPTIVE INFERENCE

An inference endpoint that learns its job.

An inference API that watches its own predictions in production, finds where it's weakest, and ships a quiet retraining run on its own — so the model behind your endpoint gets sharper every week, without an ML engineer in the loop.

IMPROVE STATE OF THE ART OPEN SOURCE MODELS

Anthropic Opus 4.7

Specializes in coding, multilingual tasks, and complex reasoning across languages

Anthropic API

DeepSeek V4

Best for structured reasoning, code generation, and precise analytical tasks

DeepSeek API

Llama 4

Strong at general reasoning, summarization, and conversational chat at speed.

Llama 3 API

START BY SELECTING AN OPEN SOURCE MODEL

Qwen

Coding

Reasoning

Multilingual

Ideal for global products and complex reasoning chains.

Qwen API

Llama 3

RAG

Summarization

Chat

Meta's best open-source model for general-purpose tasks.

Llama 3 API

DeepSeek

Agents

Coding

Planning

One of the most capable open-source models for code and reasoning

Capable model for code and reasoning

DeepSeek API

GLiNER

Extraction

Classification

Tool Calling

Small model for agent text processing and LLM model routing.

GLiNER API

START BY SELECTING AN OPEN SOURCE MODEL

GLiNER

Extraction

Classification

Structured data

The go-to model for processing unstructured text for agents.

Try GLiNER

Qwen

Qwen Chat is an AI assistant for everyone, powered by the Qwen series models.

Try Qwen

Coding

Reasoning

Multilingual

Llama 3

Meta's best open-source model for general-purpose tasks.

Try Llama 3

Reasoning

Summarization

Chat

DeepSeek

Specialized for entity extraction, classification, and structured data tasks.

Try DeepSeek

Extraction

Classification

Structured data

HOW IT WORKS

It only ships an update when it's actually better.

With Adaptive Inference, Pioneer continuously evaluates, fine-tunes, and promotes checkpoints for you.

Get Started

Point it at a task.

Pick an open model, describe the task in plain English, ship the endpoint. We handle the eval set, the routing, the autoscaling.

Watch every request.

Live traffic streams into a private, in-region eval store. We auto-cluster confusing inputs and surface where the model is hesitating.

Quietly retrain.

Once a cluster of confusion is big enough, Pioneer kicks off a LoRA run on a separate fleet, validates against your evals, and hot-swaps the adapter. You get a changelog.

ONE SHOT FINE-TUNING

Pioneer agentic fine-tuning updates models in one prompt

Thomas Dohmke

CEO @ GitHub

“Pioneer is making AI

accessible for a future with

1B developers”

“Pioneer is making AI more accessible for a future with 1B developers”

+30% avg

accuracy lift on classification & extraction tasks vs. base Llama 3.1

Higher accuracy than OSS base models

~7 days

until your first auto-improvement run lands in production

Support for latest open source models

0 lines

of fine-tuning code you have to write, ever

Production API Uptime

$0/retrain

starting price — pay for inference, the improvement is included

BUILT ON SOTA RESEARCH

State-of-the-art Research

SOTA model research. Leading model research team building small models for coding, conversational AI, agentic systems, search, and multimodality.

Data agent. State-of-the-art data tooling that outperforms existing synthetic data tools on accuracy, diversity, and task-specific output.

Adapative Inference. State-of-the-art research in reinforcement learning from production feedback, advancing how models self-improve.

Join the community

Join our active community on discord

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Need help?

Get in touch with our support team.

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Fastino Inc. (“Fastino”) develops specialized AI models and provides APIs designed to support structured data extraction, classification, reasoning, and production AI workflows. Fastino is a technology company and does not provide legal, financial, compliance, or advisory services.Any outputs, predictions, classifications, or decisions generated through Fastino models are based on the configuration, data, and implementation provided by the customer. Fastino does not control, verify, or guarantee the accuracy, completeness, or suitability of model outputs for any specific purpose. By using this website or Fastino’s models and services, you acknowledge that all content and outputs are provided for informational and operational purposes only and agree to our Terms of Use and Privacy Policy.

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