--- title: Gemini 3 Flash description: Gemini 3 Flash is Google's fast multimodal model with frontier intelligence, superior search, and grounding capabilities. image: https://developers.cloudflare.com/dev-products-preview.png --- [Skip to content](#%5Ftop) Was this helpful? YesNo [ Report issue ](https://github.com/cloudflare/cloudflare-docs/issues/new/choose) Copy page ![Google logo](https://developers.cloudflare.com/_astro/google.DyXKPTPP.svg) # Gemini 3 Flash Text Generation • Google • Proxied `google/gemini-3-flash` Gemini 3 Flash is Google's fast multimodal model with frontier intelligence, superior search, and grounding capabilities. | Model Info | | | -------------------------------------------------------------------------- | ------------------------------------------------------ | | Context Window[ ↗](https://developers.cloudflare.com/workers-ai/glossary/) | 1,000,000 tokens | | Terms and License | [link ↗](https://ai.google.dev/gemini-api/terms) | | More information | [link ↗](https://deepmind.google/technologies/gemini/) | ## Usage TypeScript ``` const response = await env.AI.run( 'google/gemini-3-flash', { contents: [ { role: 'user', parts: [ { text: 'What are the three laws of thermodynamics?', }, ], }, ], }, { gateway: { id: 'default' }, } ) console.log(response) ``` Explain Code ## Examples **With System Instruction** — Using a system instruction to set context TypeScript ``` const response = await env.AI.run( 'google/gemini-3-flash', { systemInstruction: { parts: [ { text: 'You are a helpful coding assistant specializing in Python.', }, ], }, contents: [ { role: 'user', parts: [ { text: 'How do I read a JSON file in Python?', }, ], }, ], generationConfig: { temperature: 0.3, }, }, { gateway: { id: 'default' }, } ) console.log(response) ``` Explain Code **Multi-turn Conversation** — Continuing a conversation with context TypeScript ``` const response = await env.AI.run( 'google/gemini-3-flash', { contents: [ { role: 'user', parts: [ { text: 'I need help planning a road trip from San Francisco to Los Angeles.', }, ], }, { role: 'model', parts: [ { text: "I'd be happy to help! The drive is about 380 miles and takes roughly 5-6 hours. Would you like suggestions for scenic routes or interesting stops along the way?", }, ], }, { role: 'user', parts: [ { text: 'Yes, what are some good places to stop?', }, ], }, ], generationConfig: { maxOutputTokens: 500, }, }, { gateway: { id: 'default' }, } ) console.log(response) ``` Explain Code **Creative Writing** — Higher temperature for creative output TypeScript ``` const response = await env.AI.run( 'google/gemini-3-flash', { contents: [ { role: 'user', parts: [ { text: 'Write a short story opening about a detective finding an unusual clue.', }, ], }, ], generationConfig: { temperature: 0.8, maxOutputTokens: 300, }, }, { gateway: { id: 'default' }, } ) console.log(response) ``` Explain Code ## Parameters * [ Input ](#tab-panel-86) * [ Output ](#tab-panel-87) ▶contents\[\] `array`required ▶systemInstruction{} `object` ▶generationConfig{} `object` ▶safetySettings\[\] `array` ▶tools\[\] `array` toolConfig `` ▶candidates\[\] `array` ▶usageMetadata{} `object` modelVersion `string` ## API Schemas * [ Input ](#tab-panel-84) * [ Output ](#tab-panel-85) ``` { "$schema": "https://json-schema.org/draft/2020-12/schema", "type": "object", "properties": { "contents": { "type": "array", "items": { "type": "object", "properties": { "role": { "type": "string", "enum": [ "user", "model" ] }, "parts": { "type": "array", "items": { "type": "object", "properties": { "text": { "type": "string" } }, "additionalProperties": {} } } }, "required": [ "parts" ], "additionalProperties": {} } }, "systemInstruction": { "type": "object", "properties": { "parts": { "type": "array", "items": { "type": "object", "properties": { "text": { "type": "string" } }, "additionalProperties": {} } } }, "required": [ "parts" ], "additionalProperties": {} }, "generationConfig": { "type": "object", "properties": { "temperature": { "type": "number" }, "topP": { "type": "number" }, "topK": { "type": "number" }, "maxOutputTokens": { "type": "number" }, "candidateCount": { "type": "number" }, "stopSequences": { "type": "array", "items": { "type": "string" } }, "responseMimeType": { "type": "string" } }, "additionalProperties": {} }, "safetySettings": { "type": "array", "items": { "type": "object", "properties": { "category": { "type": "string" }, "threshold": { "type": "string" } }, "required": [ "category", "threshold" ], "additionalProperties": {} } }, "tools": { "type": "array", "items": {} }, "toolConfig": {} }, "required": [ "contents" ], "additionalProperties": {} } ``` Explain Code ``` { "$schema": "https://json-schema.org/draft/2020-12/schema", "type": "object", "properties": { "candidates": { "type": "array", "items": { "type": "object", "properties": { "content": { "type": "object", "properties": { "role": { "type": "string" }, "parts": { "type": "array", "items": { "type": "object", "properties": { "text": { "type": "string" } }, "additionalProperties": {} } } }, "required": [ "parts" ], "additionalProperties": {} }, "finishReason": { "type": "string" }, "safetyRatings": { "type": "array", "items": { "type": "object", "properties": { "category": { "type": "string" }, "probability": { "type": "string" } }, "required": [ "category", "probability" ], "additionalProperties": {} } } }, "required": [ "content" ], "additionalProperties": {} } }, "usageMetadata": { "type": "object", "properties": { "promptTokenCount": { "type": "number" }, "candidatesTokenCount": { "type": "number" }, "totalTokenCount": { "type": "number" } }, "additionalProperties": {} }, "modelVersion": { "type": "string" } }, "additionalProperties": {} } ``` Explain Code ```json {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/directory/","name":"Directory"}},{"@type":"ListItem","position":2,"item":{"@id":"/ai/","name":"AI"}},{"@type":"ListItem","position":3,"item":{"@id":"/ai/models/","name":"Models"}}]} ```