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Thinking Machines: Inkling Small Thinking

inkling-small:thinking

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Inkling Small Thinking costs $0.585 per million input tokens and $1.56 per million output tokens, supports 524K context, and is available through the OpenAI-compatible API.

The reasoning version of Thinking Machines' 276B-parameter open-weights multimodal Mixture-of-Experts model with 12B active parameters. It reasons over text and images, and is designed for agentic coding, tool use, instruction following, and long workflows with controllable thinking effort.

Modalities

Text + Image + Audio → Text

Input / output price

$0.585 / $1.56 per 1M

Context

524K · max output 33K

Capabilities

ReasoningVisionTool callingLong contextOpen weights

Pricing

Billed per token actually used and deducted from your credits.

ItemUSD per 1M tokens
Input$0.585
Output$1.56
Cached input$0.130

Calculator

Drag the sliders to estimate what this model will cost.

Per request
$0.00300
Per day
$1.50
Per month (30 days)
$45.05

Inkling Small Thinking: input $0.585/M · output $1.56/M · cached input $0.13/M

Request with these settings
curl https://api.geniusrelaygpt.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "inkling-small:thinking", "max_tokens": 800,
       "messages": [{"role": "user", "content": "…"}]}'

Code samples

OpenAI-compatible. Set the base URL to https://api.geniusrelaygpt.com/v1 and the model to inkling-small:thinking.

curl https://api.geniusrelaygpt.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "inkling-small:thinking",
    "stream": true,
    "messages": [{"role": "user", "content": "Hello"}]
  }'

Use it in a client: Cursor · Cline · SillyTavern · Codex

Parameters

Common OpenAI parameters can be passed as-is.

temperaturetop_pmax_tokensstreamstoppresence_penaltyfrequency_penaltyseed

FAQ

How is Inkling Small Thinking billed?
Input is $0.585 and output is $1.56 per million tokens; cached input is $0.130. The charge for every request is listed in Usage Logs in the console.
How long is the context window?
524K tokens. In a long conversation every turn is billed for the full input, so keep the history under control.
Does it support streaming?
Yes. Add "stream": true to the request to receive server-sent events in the OpenAI format.
Inkling Small Thinking API pricing · GeniusRelay