What is the default Thinking Machines model in Sim?

Inkling is the default Thinking Machines model in Sim.

What is the cheapest Thinking Machines model tracked in Sim?

Inkling 2 Small currently has the lowest listed input price at $0.3/1M tokens.

Which Thinking Machines model has the largest context window?

Inkling currently has the largest listed context window at 262k tokens.

Which Thinking Machines models support tool use and function calling in Sim?

All Thinking Machines models in Sim support tool use and function calling, allowing agents to invoke external APIs, query databases, and run custom actions.

Back to Models

Thinking Machines models

3 models

Release timeline

When each model was first publicly available.

InklingJul 16, 2026

Inkling SmallJul 31, 2026

Inkling

thinkingmachines/inkling

$1/1M in$4.05/1M out262k ctx

Inkling 2 Small

thinkingmachines/inkling-2-small

$0.3/1M in$1/1M out262k ctx

Inkling Small

thinkingmachines/inkling-small

$0.3/1M in$1.2/1M out262k ctx

Frequently asked questions

Sim currently tracks 3 Thinking Machines models including Inkling, Inkling 2 Small, Inkling Small.