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Thinking Machines

Inkling 2 Small (free)

thinkingmachines/inkling-2-small:free

Inkling 2 Small is an open-weight multimodal mixture-of-experts reasoning model from Thinking Machines Lab, with 17B active parameters out of 594B total.

Free in · Free out per 1M tokens1M contextNov 9, 2026

Free

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Spec sheet

Published facts from the catalog, billed prices and what we measured here. Anything not measured says so.

Price, billed here

Input, per 1M tokens
$0
Output, per 1M tokens
$0
Margin
none

Context and formats

Context window
1,048,576 tokens
Longest answer
131,072 tokens
Reads
text and images
Makes
text
First listed
2026-11-09

Measured here, last 7 days

First token, median
not measured
Answered without error
not measured

Tools and JSON

Tool calling
declaredthe provider's claim, not yet measured here
JSON output
not declared

Price and latency history as JSON: GET /api/planet/history?id=thinkingmachines/inkling-2-small:free.

About

Inkling 2 Small is an open-weight multimodal mixture-of-experts reasoning model from Thinking Machines Lab, with 17B active parameters out of 594B total. It is the first model in the second...

In Thinking Machines's words.

Try it here

The answer appears here.

Measured here

Call it

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curl https://useantimatter.com/v1/chat/completions \
  -H "Authorization: Bearer $ANTIMATTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "thinkingmachines/inkling-2-small:free", "messages": [{"role": "user", "content": "Hello"}]}'

Everything else is in the docs.

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