Tinker

Training API for LoRA fine-tuning and sampling of open-weight models, including Thinking Machines' own Inkling family, with the training infrastructure run by Thinking Machines.

Find alternatives to Tinker

Billed in USD per million tokens with separate prefill, sample and train rates per model; cached prefill tokens carry an 80% discount. Train rates range from $0.396/M (GPT-OSS-20B) to $14.58/M (GLM-5.3 256K); Inkling is $5.61/M train and $4.68/M sample. Checkpoint storage is charged at $0.10 per GB per month. No free tier, trial, or published enterprise or volume tier.

What it does

• Model training
• Model inference

How it compares

• Gemini Enterprise Agent Platform (formerly Vertex AI)

  AWS Bedrock, Microsoft Azure AI, and Google Vertex AI provide model-agnostic platforms

  Research report · 19 Sep 2026
• Amazon Bedrock

  AWS Bedrock, Microsoft Azure AI, and Google Vertex AI provide model-agnostic platforms that let enterprises access multiple foundation models through unified APIs. These platforms compete directly with Thinking Machines' customization layer.

  Research report · 19 Sep 2026
• Microsoft Foundry

  AWS Bedrock, Microsoft Azure AI, and Google Vertex AI provide model-agnostic platforms that let enterprises access multiple foundation models through unified APIs. These platforms compete directly with Thinking Machines' customization layer.

  Research report · 19 Sep 2026
• Hugging Face Jobs

  Hugging Face has built the dominant open-source ecosystem for model deployment and fine-tuning, while NVIDIA's AI foundry services target enterprises wanting custom models.

  Research report · 19 Sep 2026
• NVIDIA AI Enterprise

  NVIDIA's AI foundry services target enterprises wanting custom models.

  Research report · 19 Sep 2026

Sources

Pricing

Pricing page · 4 Sep 2026

Description

Official documentation · 4 Sep 2026

Sold within

Pricing page · 30 Sep 2026

Tinker's "Models & Pricing" page states "All prices are per million tokens. Checkpoint storage is charged at $0.10 per GB per month." and "We provide an 80% discount on cached prefill tokens.", with Prefill, Sample and Train rates per model. The product page offers a self-serve "Sign up" and says "Tinker uses a pricing plan that reflects usage."

Deployment

Self-reported · 8 Sep 2026

Inferred 2026-09-08, not read off a page: every already-decided product of type 'api-service' in this catalogue includes "saas" in its deployment list, zero exceptions, per item 198's measured cross-tab. May be incomplete if this product also offers a self-hosted or private-cloud option; not wrong either way.

Open Thinking Machines Lab in the directory

Something wrong here? Send a correction — quote this product id: tinker.