--- description: Pareto is Unbiased's blended AI model. It engages multiple language models in parallel for each request, synthesizes one answer, and supports text and vision inputs through a single API response. title: Pareto 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. u # Pareto Text Generation • unbiased Copy as Markdown| [View as Markdown](https://developers.cloudflare.com/ai/models/unbiased/pareto/index.md)| [Agent setup](https://developers.cloudflare.com/agent-setup/) `unbiased/pareto` - Third-party - Zero data retention Pareto is Unbiased's blended AI model. It engages multiple language models in parallel for each request, synthesizes one answer, and supports text and vision inputs through a single API response. | Model Info | | | --- | --- | | Terms and License | [link ↗](https://unbiased.ai/terms/) | | More information | [link ↗](https://unbiased.ai/model-card/) | | Zero data retention | Yes | | Request formats | Chat Completions | | Pricing | | ## Usage ```ts const response = await env.AI.run( 'unbiased/pareto', { messages: [{ content: 'What is the capital of France? Answer in one word.', role: 'user' }], max_tokens: 16, }, ) console.log(response) ``` ```bash curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/v1/chat/completions \ --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \ --header "Content-Type: application/json" \ --data '{ "model": "unbiased/pareto", "messages": [ { "content": "What is the capital of France? Answer in one word.", "role": "user" } ], "max_tokens": 16 }' ``` ``` Paris ``` ```json { "id": "chatcmpl-mu5ww8tss0mj6ofw", "object": "chat.completion", "model": "unbiased/pareto", "choices": [ { "index": 0, "message": { "role": "assistant", "content": "Paris" }, "finish_reason": "stop" } ], "usage": { "prompt_tokens": 11, "completion_tokens": 5, "total_tokens": 16, "prompt_tokens_details": { "cached_tokens": 0 }, "cost": 0.000045 }, "gatewayMetadata": { "keySource": "Unified" } } ``` ## Examples
**System Guidance** — Set a helpful system role before asking a question. ```ts const response = await env.AI.run( 'unbiased/pareto', { messages: [ { content: 'You explain technical topics in plain language.', role: 'system' }, { content: 'What is an API? Explain it in two sentences.', role: 'user' }, ], max_tokens: 64, }, ) console.log(response) ``` ```bash curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/v1/chat/completions \ --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \ --header "Content-Type: application/json" \ --data '{ "model": "unbiased/pareto", "messages": [ { "content": "You explain technical topics in plain language.", "role": "system" }, { "content": "What is an API? Explain it in two sentences.", "role": "user" } ], "max_tokens": 64 }' ``` ``` An API (Application Programming Interface) is a set of rules that lets one software program request information or actions from another. For example, a weather app uses an API to get forecasts from a weather service. ``` ```json { "id": "chatcmpl-mu5wwcpm6hxi7lsb", "object": "chat.completion", "model": "unbiased/pareto", "choices": [ { "index": 0, "message": { "role": "assistant", "content": "An API (Application Programming Interface) is a set of rules that lets one software program request information or actions from another. For example, a weather app uses an API to get forecasts from a weather service." }, "finish_reason": "stop" } ], "usage": { "prompt_tokens": 19, "completion_tokens": 45, "total_tokens": 64, "prompt_tokens_details": { "cached_tokens": 0 }, "cost": 0.000305 }, "gatewayMetadata": { "keySource": "Unified" } } ```
**Coding Example** — Ask for a short coding example. ```ts const response = await env.AI.run( 'unbiased/pareto', { messages: [ { content: 'Write a JavaScript function that reverses a string. Include one example call.', role: 'user', }, ], max_tokens: 128, }, ) console.log(response) ``` ```bash curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/v1/chat/completions \ --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \ --header "Content-Type: application/json" \ --data '{ "model": "unbiased/pareto", "messages": [ { "content": "Write a JavaScript function that reverses a string. Include one example call.", "role": "user" } ], "max_tokens": 128 }' ``` ```` ```javascript function reverseString(str) { return Array.from(str).reverse().join(""); } console.log(reverseString("Hello")); // "olleH" ``` ```` ```json { "id": "chatcmpl-mu5wwj1mqcjfe7xb", "object": "chat.completion", "model": "unbiased/pareto", "choices": [ { "index": 0, "message": { "role": "assistant", "content": "```javascript\nfunction reverseString(str) {\n return Array.from(str).reverse().join(\"\");\n}\n\nconsole.log(reverseString(\"Hello\")); // \"olleH\"\n```" }, "finish_reason": "stop" } ], "usage": { "prompt_tokens": 14, "completion_tokens": 37, "total_tokens": 51, "prompt_tokens_details": { "cached_tokens": 0 }, "cost": 0.00024875 }, "gatewayMetadata": { "keySource": "Unified" } } ```
**Follow-up Conversation** — Continue a short conversation with prior assistant context. ```ts const response = await env.AI.run( 'unbiased/pareto', { messages: [ { content: 'I am planning a weekend trip to a coastal city.', role: 'user' }, { content: 'Consider walkable neighborhoods, local food, and a nearby beach.', role: 'assistant', }, { content: 'What should I prioritize when choosing where to stay?', role: 'user' }, ], max_tokens: 96, }, ) console.log(response) ``` ```bash curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/v1/chat/completions \ --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \ --header "Content-Type: application/json" \ --data '{ "model": "unbiased/pareto", "messages": [ { "content": "I am planning a weekend trip to a coastal city.", "role": "user" }, { "content": "Consider walkable neighborhoods, local food, and a nearby beach.", "role": "assistant" }, { "content": "What should I prioritize when choosing where to stay?", "role": "user" } ], "max_tokens": 96 }' ``` ``` For a weekend trip, **prioritize location over extra amenities**—less time in transit means more time enjoying the city. - **Close to your main plans:** Stay near the beach for a beach-focused trip, or near restaurants and sights if you’re more interested in exploring. - **Easy transportation:** Check airport or station connections, public transit, and parking costs if you’re driving. - **Comfort and quiet:** Recent reviews can reveal street noise, cleanliness issues ``` ```json { "id": "chatcmpl-mu5wwqlruoazrxij", "object": "chat.completion", "model": "unbiased/pareto", "choices": [ { "index": 0, "message": { "role": "assistant", "content": "For a weekend trip, **prioritize location over extra amenities**—less time in transit means more time enjoying the city.\n\n- **Close to your main plans:** Stay near the beach for a beach-focused trip, or near restaurants and sights if you’re more interested in exploring.\n- **Easy transportation:** Check airport or station connections, public transit, and parking costs if you’re driving.\n- **Comfort and quiet:** Recent reviews can reveal street noise, cleanliness issues" }, "finish_reason": "length" } ], "usage": { "prompt_tokens": 43, "completion_tokens": 96, "total_tokens": 139, "prompt_tokens_details": { "cached_tokens": 0 }, "cost": 0.00065375 }, "gatewayMetadata": { "keySource": "Unified" } } ```
**Creative Writing** — Generate a compact piece of creative writing. ```ts const response = await env.AI.run( 'unbiased/pareto', { messages: [ { content: 'Write a four-line poem about finding light after a difficult day.', role: 'user' }, ], max_tokens: 96, }, ) console.log(response) ``` ```bash curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/v1/chat/completions \ --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \ --header "Content-Type: application/json" \ --data '{ "model": "unbiased/pareto", "messages": [ { "content": "Write a four-line poem about finding light after a difficult day.", "role": "user" } ], "max_tokens": 96 }' ``` ``` The day lay heavy, stitched with shades of gray, Until one star shone through the frayed dusk’s seam. I set my burdens down beside the way, And let its little light rekindle dream. ``` ```json { "id": "chatcmpl-mu5wx6hq2jpgslxe", "object": "chat.completion", "model": "unbiased/pareto", "choices": [ { "index": 0, "message": { "role": "assistant", "content": "The day lay heavy, stitched with shades of gray,\nUntil one star shone through the frayed dusk’s seam.\nI set my burdens down beside the way,\nAnd let its little light rekindle dream." }, "finish_reason": "stop" } ], "usage": { "prompt_tokens": 12, "completion_tokens": 46, "total_tokens": 58, "prompt_tokens_details": { "cached_tokens": 0 }, "cost": 0.0003025 }, "gatewayMetadata": { "keySource": "Unified" } } ```
## Parameters ▶messages\[] `array`required temperature `number`minimum: 0maximum: 2 max\_tokens `number`exclusiveMinimum: 0 max\_completion\_tokens `number`exclusiveMinimum: 0 top\_p `number`minimum: 0maximum: 1 frequency\_penalty `number`minimum: -2maximum: 2 presence\_penalty `number`minimum: -2maximum: 2 stream `boolean` ▶stream\_options{} `object` ▶tools\[] `array` tool\_choice response\_format ▶modalities\[] `array` ▶audio{} `object` reasoning\_effort `string`Optional reasoning control; availability and accepted values are model-dependent. id `string` object `string` created `number` model `string` ▶choices\[] `array` ▶usage{} `object` ## API Schemas (Raw) Input [Open](https://developers.cloudflare.com/ai/models/unbiased/pareto/schema-input.json) [Download](https://developers.cloudflare.com/ai/models/unbiased/pareto/schema-input.json) Output [Open](https://developers.cloudflare.com/ai/models/unbiased/pareto/schema-output.json) [Download](https://developers.cloudflare.com/ai/models/unbiased/pareto/schema-output.json) Was this helpful? YesNo ## On this page [![](https://developers.cloudflare.com/_astro/logo.te5VL_aD.svg)Docs](https://developers.cloudflare.com/) ```json {"@context":"https://schema.org","@type":"TechArticle","@id":"https://developers.cloudflare.com/ai/models/unbiased/pareto/#page","headline":"Pareto","description":"Pareto is Unbiased's blended AI model. It engages multiple language models in parallel for each request, synthesizes one answer, and supports text and vision inputs through a single API response.","url":"https://developers.cloudflare.com/ai/models/unbiased/pareto/","inLanguage":"en","image":"https://developers.cloudflare.com/og-docs.png","publisher":{"@type":"Organization","name":"Cloudflare","description":"One platform for your apps, agents, and workforce. Build, secure, and scale without managing infrastructure","url":"https://www.cloudflare.com/","sameAs":["https://github.com/cloudflare","https://www.linkedin.com/company/cloudflare","https://x.com/cloudflare"],"logo":{"@type":"ImageObject","url":"https://developers.cloudflare.com/logo.svg"},"address":{"@type":"PostalAddress","streetAddress":"101 Townsend St","addressLocality":"San Francisco","addressRegion":"CA","postalCode":"94107","addressCountry":"US"},"contactPoint":[{"@type":"ContactPoint","contactType":"Customer Support","url":"https://support.cloudflare.com/","availableLanguage":["English"]},{"@type":"ContactPoint","contactType":"Sales","url":"https://www.cloudflare.com/contact/","availableLanguage":["English"]}]},"isPartOf":{"@type":"WebSite","@id":"https://developers.cloudflare.com/#website","name":"Cloudflare Docs","url":"https://developers.cloudflare.com/"}} ```