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    Announcing our $11.8M Series Seed.

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    Optimize your intelligence stack.

    Full-stack LLM lifecycle managment. Deploy, observe, train, and evaluate frontier AI models from any provider. Install the SDK in 5 minutes to get started.

    Talk to an Engineer

    Trusted by the world's best engineering teams.

    Gravity
    Profound
    Cal AI
    Nu
    NVIDIA
    24Labs
    Grass
    Rizz

    Your data. Your models.
    Own the whole stack end-to-end.

    Connect every stage of the LLM lifecycle into a single data flywheel.
    Turn production signals into evaluations, training data, and smarter models.
    Train private, GPT-5-quality models with 90% lower cost and 5x lower latency.

    Deploy

    Deploy models from our catalog, or train your own. 99.99% uptime.

    Kimi K2.5
    Deploy
    MiniMax-M2.5
    Deploy
    GLM-5
    Deploy
    GPT-OSS 120B
    Deploy
    Learn moreStart Deploying
    Observe

    Production-grade LLM observability for any model on any provider.

    Learn moreInstall SDK
    Train

    Fine-tune custom frontier-level language models in minutes

    Learn moreTraining Guide
    Evaluate

    Continuously evaluate models against production traces

    ModelCostQuality
    Custom Model$25K
    9.1
    GPT 5.2 Pro$138K
    8.3
    Claude Opus 4.6$190K
    8.2
    Gemini 2.5 Pro$74K
    7.1
    DeepSeek v3.2$41K
    6.8
    Learn moreEval Guide

    Cutting-edge LLM performance research
    for unmatched quality, speed and uptime

    Learn how teams like GravityAds and Profound use Inference.net to deploy, observe, evaluate, and train GPT-5 quality models at low cost and lightening fast speed. We handle the infrastructure, so you don't have to.

    Faster than Cerebas

    Learn how Gravity Ads used Cataylst Train and Deploy to cut p-90 round-trip latency from 900ms to 240ms.

    Learn more
    Requests
    87.3M
    Avg Duration
    195ms
    Cost / 1K
    $0.12
    Duration195msp50 / p75 / p90 / p99

    High intelligence. Low cost

    Frontier-quality models that product teams demand. Pricing your finance team will love

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    Your private data flywheel

    Create compounding LLM flywheels by observing production traces and training on new data when needed.

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    DeployObserveTrainEvaluateLLM DataFlywheel
    “Our custom model is more accurate, more affordable, and cut request latency by more than 50%. The whole experience was a breeze, and the inference.net team was great to work with.”
    Henry Langmack
    Henry Langmack
    Co-founder, CTO @ Cal AI
    DEPLOY

    Deploy LLMs anywhere.
    Run at lightning speed.

    High-performance model hosting for production workloads. Serve models reliably at massive scale across public cloud, private cloud, or hybrid environments.

    ModelInstance TypePrice / HourActions
    Kimi K2.5
    B200180 GiB VRAM
    		$9.98Deploy
    MiniMax-M2.5
    B200180 GiB VRAM
    		$9.98Deploy
    GLM-5
    B200180 GiB VRAM
    		$9.98Deploy
    GPT-OSS 120B
    B200180 GiB VRAM
    		$9.98Deploy
    View All Models
    OBSERVE

    LLM Observability for any
    model on any provider.

    Your data, your moat. Catalyst Observe plugins into your existing LLM pipeline to store requests and generate insights. Get started in 5 minutes.

    Total Requests
    8.3M
    Error Rate
    0.01%
    830 errors
    Total Cost
    $1,379
    In: $842 · Out: $537
    Avg Duration
    6.41s

    Requests

    8.3M

    Success Rate

    99.99%

    830 total errors

    Duration

    6.41s

    Percentiles: p50, p75, p90, p99

    Payload Size

    8.4 KB

    Avg Input: 8.4 KB · Avg Output: 1.8 KB

    Trace every request path

    See prompts, tool calls, responses, full traces, and downstream provider behavior in one place.

    Monitor what matters

    Track latency, reliability, usage patterns, and quality signals as your traffic scales.

    Search and debug faster

    Find patterns across events, isolate failure modes, and move from symptom to root cause quickly.

    SOC 2 Type II

    Fully SOC 2 compilant. Full control and operational oversight of your data and models across the entire stack.

    MODEL TRAINING

    Specialized Language Models
    built for production workloads

    Fine-tune frontier-quality language models tuned to your quality, cost, and latency targets — so you get better performance with less compute.

    Talk to an Engineer

    Automatic fine-tuning workflows

    Targeted improvements for your domain, your tasks, your quality objectives. Training workflows tailored to the specific patterns your model needs to learn.

    Curate training data on autopilot

    Move from observed traces and eval failures to high-signal training datasets in minutes. Production data to training-ready samples without manual curation or data wrangling.

    Validate before you promote

    Evaluate new model variants against baseline behavior automatically. Know exactly what improved and what didn't before a single user sees the new model.

    Retrain as your product evolves

    Set up continuous improvement loops that retrain on fresh production data as your user base grows and your use cases shift. Your model gets better every cycle.

    EVALUATE

    Make model decisions
    based on evidence, not vibes.

    Catalyst Evaluate turns production traces into continuous model improvement workflows. Measure behavior against your standards, detect regressions early, and prioritize exactly what to improve.

    Build and run evals on production traffic

    Convert observed traces into evaluation datasets that reflect real user behavior.

    Score quality across any model or metric

    Combine automated scoring, task-specific checks, and human review for a 360° view of model quality.

    Automatic fine-tuning and evaluation that just works

    Use your production traces and evaluation data to train and evaluate frontier models in minutes.

    CONTACT

    Meet with our research team

    Schedule a call with our research team. We'll propose a train-and-serve plan that beats your current SLA and unit cost.

    OPEN SOURCE

    Our Workhorse Models

    Cliptagger

    Designed for reasoning and complex problem-solving tasks, offering advanced capabilities for structured output generation and complex reasoning.

    Try Model

    Schematron

    Designed for reasoning and complex problem-solving tasks, offering advanced capabilities for structured output generation and complex reasoning.

    Try Model