Thinking Machines Lab

PrivateRank #33 by valueUnited StatesFounded 2025thinkingmachines.ai

Frontier AI lab founded by Mira Murati that develops customizable multimodal models and training tools intended to extend human judgment and collaboration.

Frontier AI Labs Foundation Models Developer Tools

AI valuation

$12B*

Jul 15, 2025 · TechCrunch

October 20261

Oct 7, 2026Thinking Machines careers system shows 53 open roles53 open roles^†Open roles

An independent careers index counted 53 live roles on Thinking Machines Lab's verified Ashby hiring board. The number is a point-in-time external snapshot.

AI Career Atlas Open rolesThinking Machines Lab

July 20263

Jul 30, 2026Thinking Machines releases Inkling-SmallInkling-Small · Inkling-SmallModel release

Thinking Machines released Inkling-Small, a 276B-total-parameter mixture-of-experts model with 12B active parameters and performance comparable to the larger Inkling model.

Thinking Machines Lab Model releaseThinking Machines Lab Inkling-Small

Jul 15, 2026Thinking Machines opens the Inkling model weightsInkling · InklingOpen weights

Thinking Machines published Inkling's full weights and made the model available for customization through Tinker.

Thinking Machines Lab Open weightsThinking Machines Lab Inkling

Jul 15, 2026Thinking Machines releases InklingInkling · InklingModel release

Thinking Machines released Inkling, a 975B-total-parameter multimodal mixture-of-experts model with 41B active parameters and up to a one-million-token context window.

Thinking Machines Lab Model releaseThinking Machines Lab Inkling

March 20262

Mar 10, 2026Thinking Machines grows to roughly 120 employees120 employees^†Employee count

Thinking Machines was reported to have grown from about 30 employees to roughly 120 over its first year.

Axios Employee countThinking Machines Lab

Mar 10, 2026Thinking Machines and NVIDIA announce gigawatt-scale partnershipAnnouncedPartnership

Thinking Machines and NVIDIA announced a multi-year partnership to deploy at least one gigawatt of Vera Rubin systems, alongside an NVIDIA investment.

Thinking Machines Lab PartnershipThinking Machines Lab

December 20251

Dec 12, 2025Tinker reaches general availabilityTinker · general availabilityAPI update

Tinker became generally available with vision input, Kimi K2 Thinking support and an OpenAI-compatible sampling interface.

Thinking Machines Lab API updateThinking Machines Lab Tinker

October 20252

Oct 1, 2025Thinking Machines releases the Tinker CookbookTinker CookbookSDK release

The company released the open-source Tinker Cookbook with modern post-training implementations and examples built on the Tinker API.

Thinking Machines Lab SDK releaseThinking Machines Lab Tinker Cookbook

Oct 1, 2025Thinking Machines launches Tinker in private betaTinker · private betaAPI release

Thinking Machines launched Tinker, a managed API that exposes low-level primitives for fine-tuning and post-training open-weight models.

Thinking Machines Lab API releaseThinking Machines Lab Tinker

July 20251

Jul 15, 2025Thinking Machines raises $2 billion seed round$2B raisedFunding round

Thinking Machines Lab closed a $2 billion seed financing led by Andreessen Horowitz with participation from NVIDIA, Accel, AMD, Cisco, ServiceNow and Jane Street.

TechCrunch Funding roundThinking Machines Lab

February 20252

Feb 18, 2025Thinking Machines starts with about 30 employees30 employees^†Employee count

At launch, Thinking Machines Lab was reported to have approximately 30 employees, including a number of former OpenAI researchers and engineers.

Axios Employee countThinking Machines Lab

Feb 18, 2025Thinking Machines Lab is unveiledNews

Mira Murati publicly introduced Thinking Machines Lab and its mission to build AI systems that are more understandable, customizable and collaborative.

Axios NewsThinking Machines Lab

* Market cap / valuation. Company values are AI-attributed: the latest market cap or valuation × the share attributed to AI (100% for pure AI companies). Methodology