inkling-2-small
Inkling 2 Small is an open-weight multimodal mixture-of-experts reasoning model from Thinking Machines Lab, with 17B active out of 594B total parameters — the first model of the Inkling 2 generation.
Pricing: Input 72 credits / 1M tokens (≈ $0.36), Output 240 credits / 1M tokens (≈ $1.20).
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Inkling 2 Small API on ModelFold
Inkling 2 Small is an open-weight multimodal mixture-of-experts reasoning model from Thinking Machines Lab, with 17B active out of 594B total parameters — the first model of the Inkling 2 generation. Try Inkling 2 Small in the ModelFold Playground, then call it from your own code through an OpenAI-compatible chat completions API.
What Is the Inkling 2 Small API
Inkling 2 Small at a glance
Inkling 2 Small is a chat model from Thinking Machines. It accepts text and images as input and returns text, with a context window of up to 1M tokens.
Use it without hosting anything
On ModelFold you call Inkling 2 Small with a single API key — no model weights to download and no inference servers to run. The same key also works for the other chat, image, video and audio models on ModelFold.
Core Capabilities of Inkling 2 Small
Up to 1M tokens of context
Keep long conversations, large documents and sizeable code in a single request, so the model can reason over the full material instead of fragments.
Understands images
Besides text, Inkling 2 Small accepts images as input, so a single request can combine instructions with visual or other media.
Function calling
Inkling 2 Small supports tool (function) calling: describe your functions in the request and the model returns structured calls your code can run — the basis for agents and integrations.
Adjustable reasoning effort
Choose a reasoning effort level (low, medium or high) per request to balance depth of thinking against speed and token usage.
Structured outputs
Ask for JSON that follows a schema (response_format), which makes extraction, classification and system integrations more reliable.
How to Use Inkling 2 Small on ModelFold
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Step 1: Try it in the Playground
Open the Playground at the top of this page, type a prompt and see how Inkling 2 Small responds before writing any code.
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Step 2: Create an API key
Sign in to ModelFold and create an API key in the console. Keep it secret and send it as a Bearer token.
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Step 3: Send a request
Call POST https://modelfold.ai/v1/chat/completions with "model": "inkling-2-small" and your messages. Existing OpenAI-compatible SDKs work by changing the base URL and key.
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Step 4: Ship and monitor
Integrate the response into your product and check token usage and spend for every call in the console logs.
What You Can Build with Inkling 2 Small
Analysis and complex reasoning
Work through research questions, data interpretation, planning and other problems that need careful step-by-step reasoning.
Screenshot and image understanding
Read screenshots, charts, diagrams and photos alongside text — for UI review, visual QA or turning images into structured data.
High-volume pipelines
Run classification, extraction, rewriting and batch jobs at scale where cost per request matters.
Long-document workflows
Feed in long reports, contracts, manuals or codebases and ask for summaries, comparisons and answers grounded in the material.
Frequently Asked Questions
What is Inkling 2 Small?⌄
Inkling 2 Small is an open-weight multimodal mixture-of-experts reasoning model from Thinking Machines Lab, with 17B active out of 594B total parameters — the first model of the Inkling 2 generation.
Which inputs does Inkling 2 Small support?⌄
Inkling 2 Small accepts text and images and returns text. Through ModelFold you can send text and images (OpenAI-style image_url content); in the Playground you can also attach documents, which are converted to text.
How long is the context window of Inkling 2 Small?⌄
Up to 1M tokens, shared between your input and the model’s output.
Does Inkling 2 Small support function calling?⌄
Yes. Inkling 2 Small supports tools / function calling through the standard tools parameter of the chat completions API.
How is Inkling 2 Small billed on ModelFold?⌄
Pay as you go by tokens: input and output tokens are charged at the per-million-token prices shown on this page. There is no monthly fee, and failed requests are not charged.
How do I call Inkling 2 Small through the API?⌄
Send a POST request to https://modelfold.ai/v1/chat/completions with "model": "inkling-2-small", using your ModelFold API key as the Bearer token.
| Input | 72 credits 1M tokens≈ $0.36 |
| Output | 240 credits 1M tokens≈ $1.20 |
Billed per token: input and output are priced separately, and thinking tokens count as output. The Playground charges exactly the same way.
Read API docs →AI Agents · Claude Code / Cursor / Trae →curl https://modelfold.ai/v1/chat/completions \
-H "Authorization: Bearer $MODELFOLD_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"inkling-2-small","messages":[{"role":"user","content":"Hello"}]}'