Workers AI - Inkling 2 Small now available on Workers AI

@cf/thinkingmachines/inkling-2-small is now available on Workers AI. Inkling 2 Small is the second generation of Inkling models from Thinking Machines Lab, and the first frontier open model from a US lab on Workers AI.

Inkling 2 Small is more capable than the previous generation. It is a multimodal Mixture-of-Experts model with 594B total parameters and 18B active parameters. Thinking Machines trained it much faster than previous models because of improvements to their pre-training and infrastructure.

Inkling 2 Small works well for:

• Agentic coding: Plan, write, and edit code across multi-step tasks.
• Vision understanding: Interpret images sent alongside text in the same request.
• General agentic knowledge work: Research, analyze, and act on information with tools.

Key capabilities:

• Vision: Accepts text and image inputs.
• Reasoning: Reasoning is on by default at high effort. Set reasoning_effort to max, medium, low, or minimal to change the effort, or to none to turn reasoning off.
• Function calling: Build agents that invoke tools and APIs across multiple conversation turns.
• Long context: A full 1,048,576 token context window.

Inkling 2 Small requires the Workers Paid plan or prepaid AI Gateway credits. The default rate limit is 20 requests per minute with standard Workers AI billing and 50 requests per minute with prepaid AI Gateway credits. For details, refer to limits.

Use Inkling 2 Small through the Workers AI binding (env.AI.run()), the REST API, the OpenAI-compatible endpoint, or AI Gateway.

For more information, refer to the Inkling 2 Small model page and pricing.