--- description: Inkling is Thinking Machines' open-weights hybrid reasoning model, built on a mixture-of-experts architecture. It reasons by default, exposing its chain-of-thought as leading thinking content blocks, with reasoning effort tunable via a Tinker-specific output_config.effort parameter. Available through Tinker's beta Anthropic Messages-compatible endpoint alongside tool use, streaming, and multi-turn conversations. Currently intended for low-traffic testing and internal use rather than high-throughput production deployments; prompt caching, citations, and audio input are not supported through this endpoint. title: Inkling image: https://developers.cloudflare.com/og-docs.png --- [Skip to content](#main-content) > Documentation Index > Fetch the complete documentation index at: https://developers.cloudflare.com/llms.txt > Use this file to discover all available pages before exploring further. t # Inkling Text Generation • thinkingmachines Copy as Markdown|[View as Markdown](https://developers.cloudflare.com/ai/models/thinkingmachines/inkling/index.md)|[Agent setup](https://developers.cloudflare.com/agent-setup/) `thinkingmachines/inkling` * Third-party Inkling is Thinking Machines' open-weights hybrid reasoning model, built on a mixture-of-experts architecture. It reasons by default, exposing its chain-of-thought as leading thinking content blocks, with reasoning effort tunable via a Tinker-specific output\_config.effort parameter. Available through Tinker's beta Anthropic Messages-compatible endpoint alongside tool use, streaming, and multi-turn conversations. Currently intended for low-traffic testing and internal use rather than high-throughput production deployments; prompt caching, citations, and audio input are not supported through this endpoint. | Model Info | | | -------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------- | | Context Window[ ↗](https://developers.cloudflare.com/workers-ai/glossary/) | 64,000 tokens | | More information | [link ↗](https://huggingface.co/thinkingmachines/Inkling) | | Request formats | Anthropic Messages | | Pricing | [View pricing in the Cloudflare dashboard ↗](https://dash.cloudflare.com/?to=/:account/ai/models/thinkingmachines/inkling) | ## Usage ```ts const response = await env.AI.run( 'thinkingmachines/inkling', { max_tokens: 512, messages: [{ content: 'The capital of France is', role: 'user' }] }, ) console.log(response) ``` ```bash curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/v1/messages \ --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \ --header "Content-Type: application/json" \ --data '{ "model": "thinkingmachines/inkling", "max_tokens": 512, "messages": [ { "content": "The capital of France is", "role": "user" } ] }' ``` Paris. ```json { "id": "msg_922ec1780752447c802ec60be3dabfd6", "type": "message", "role": "assistant", "content": [ { "type": "thinking", "thinking": "The user is asking a simple factual question: \"The capital of France is\". The answer is Paris. I should provide the answer clearly and concisely.", "signature": "" }, { "type": "text", "text": "Paris." } ], "model": "thinkingmachines/Inkling", "stop_reason": "end_turn", "usage": { "input_tokens": 0, "output_tokens": 41, "cache_creation_input_tokens": 19, "cache_read_input_tokens": 0 } } ``` ## Examples **Tool Use** — Tool use round-trip: the model requests a tool call, then answers using the tool\_result supplied in a follow-up user message ```ts const response = await env.AI.run( 'thinkingmachines/inkling', { max_tokens: 1024, messages: [ { content: "What's the weather in Paris?", role: 'user' }, { content: [ { id: 'toolu_01A1x1x1x1x1x1x1x1x1x1x1', input: { city: 'Paris' }, name: 'get_weather', type: 'tool_use', }, ], role: 'assistant', }, { content: [ { content: 'Sunny, 22°C', tool_use_id: 'toolu_01A1x1x1x1x1x1x1x1x1x1x1', type: 'tool_result', }, ], role: 'user', }, ], tools: [ { description: 'Get the current weather for a city.', input_schema: { properties: { city: { type: 'string' } }, required: ['city'], type: 'object', }, name: 'get_weather', }, ], }, ) console.log(response) ``` ```bash curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/v1/messages \ --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \ --header "Content-Type: application/json" \ --data '{ "model": "thinkingmachines/inkling", "max_tokens": 1024, "messages": [ { "content": "What'\''s the weather in Paris?", "role": "user" }, { "content": [ { "id": "toolu_01A1x1x1x1x1x1x1x1x1x1x1", "input": { "city": "Paris" }, "name": "get_weather", "type": "tool_use" } ], "role": "assistant" }, { "content": [ { "content": "Sunny, 22°C", "tool_use_id": "toolu_01A1x1x1x1x1x1x1x1x1x1x1", "type": "tool_result" } ], "role": "user" } ], "tools": [ { "description": "Get the current weather for a city.", "input_schema": { "properties": { "city": { "type": "string" } }, "required": [ "city" ], "type": "object" }, "name": "get_weather" } ] }' ``` The weather in Paris is sunny with a temperature of 22°C. Enjoy the nice weather! ```json { "id": "msg_ddfc346862fc4a3f8afc1f8f53e1d932", "type": "message", "role": "assistant", "content": [ { "type": "thinking", "thinking": "The user asked for the weather in Paris and the function returned \"Sunny, 22°C\". I should provide a clear, friendly answer with this information.", "signature": "" }, { "type": "text", "text": "The weather in Paris is sunny with a temperature of 22°C. Enjoy the nice weather!" } ], "model": "thinkingmachines/Inkling", "stop_reason": "end_turn", "usage": { "input_tokens": 0, "output_tokens": 57, "cache_creation_input_tokens": 95, "cache_read_input_tokens": 0 } } ``` **Extended Thinking Effort** — Controlling reasoning effort via Tinker's output\_config.effort extension. The model's chain-of-thought is returned as a leading thinking content block before the answer. ```ts const response = await env.AI.run( 'thinkingmachines/inkling', { max_tokens: 1024, messages: [{ content: 'What is 17 * 23?', role: 'user' }], output_config: { effort: 'high' }, }, ) console.log(response) ``` ```bash curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/v1/messages \ --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \ --header "Content-Type: application/json" \ --data '{ "model": "thinkingmachines/inkling", "max_tokens": 1024, "messages": [ { "content": "What is 17 * 23?", "role": "user" } ], "output_config": { "effort": "high" } }' ``` 17 × 23 = **391** (Breakdown: 17 × 20 = 340, plus 17 × 3 = 51; 340 + 51 = 391) ```json { "id": "msg_a7e845f498bd44e9b1d63dca8b104a2e", "type": "message", "role": "assistant", "content": [ { "type": "thinking", "thinking": "The user is asking for the product of 17 and 23. Let me calculate that.\n\n17 * 23 = ?\n\nI can compute this as:\n17 * 20 = 340\n17 * 3 = 51\n340 + 51 = 391\n\nAlternatively:\n17 * 23 = 17 * (25 - 2) = 425 - 34 = 391\nOr (20 - 3) * 23 = 460 - 69 = 391\n\nSo the answer is 391.", "signature": "" }, { "type": "text", "text": "17 × 23 = **391**\n\n(Breakdown: 17 × 20 = 340, plus 17 × 3 = 51; 340 + 51 = 391)" } ], "model": "thinkingmachines/Inkling", "stop_reason": "end_turn", "usage": { "input_tokens": 0, "output_tokens": 155, "cache_creation_input_tokens": 22, "cache_read_input_tokens": 0 } } ``` ## Parameters ▶messages\[\] `array`required max\_tokens `number`requiredexclusiveMinimum: 0 system `string` temperature `number`minimum: 0maximum: 1 top\_p `number`minimum: 0maximum: 1 top\_k `number`exclusiveMinimum: 0 stream `boolean` ▶metadata{} `object` id `string` type `string`const: message role `string`const: assistant ▶content\[\] `array` model `string` stop\_reason `string | null` ▶usage{} `object` ## API Schemas (Raw) Input Output Was this helpful? YesNo ## On this page [![](https://developers.cloudflare.com/_astro/logo.DMYpXs3t.svg)Docs](https://developers.cloudflare.com/) ```json {"@context":"https://schema.org","@type":"TechArticle","@id":"https://developers.cloudflare.com/ai/models/thinkingmachines/inkling/#page","headline":"Inkling (thinkingmachines) · Cloudflare AI docs · Cloudflare AI docs","description":"Inkling is Thinking Machines' open-weights hybrid reasoning model, built on a mixture-of-experts architecture. It reasons by default, exposing its chain-of-thought as leading thinking content blocks, with reasoning effort tunable via a Tinker-specific output\\_config.effort parameter. Available through Tinker's beta Anthropic Messages-compatible endpoint alongside tool use, streaming, and multi-turn conversations. Currently intended for low-traffic testing and internal use rather than high-throughput production deployments; prompt caching, citations, and audio input are not supported through this endpoint.","url":"https://developers.cloudflare.com/ai/models/thinkingmachines/inkling/","inLanguage":"en","image":"https://developers.cloudflare.com/og-docs.png","publisher":{"@type":"Organization","name":"Cloudflare","url":"https://www.cloudflare.com/"},"isPartOf":{"@type":"WebSite","@id":"https://developers.cloudflare.com/#website","name":"Cloudflare Docs","url":"https://developers.cloudflare.com/"}} ```