--- description: GPT-6 Astra is OpenAI's most capable model, built for complex reasoning, coding, computer use, research, and document creation. title: GPT-6 Astra 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. ![OpenAI logo](https://developers.cloudflare.com/_astro/openai.BBwNKzBb.svg) # GPT-6 Astra Text Generation • OpenAI Copy as Markdown| [View as Markdown](https://developers.cloudflare.com/ai/models/openai/gpt-6-astra/index.md)| [Agent setup](https://developers.cloudflare.com/agent-setup/) `openai/gpt-6-astra` - Third-party GPT-6 Astra is OpenAI's most capable model, built for complex reasoning, coding, computer use, research, and document creation. | Model Info | | | --- | --- | | Context Window [ ↗](https://developers.cloudflare.com/workers-ai/platform/glossary/) | 1,050,000 tokens | | Terms and License | [link ↗](https://openai.com/policies/) | | More information | [link ↗](https://developers.openai.com/api/docs/models/gpt-6-astra) | | Request formats | Responses, Chat Completions | | Pricing | | ## Usage ```ts const response = await env.AI.run( 'openai/gpt-6-astra', { input: 'A service has 99.9% monthly availability and just had 31 minutes of downtime. Has it exceeded the monthly error budget for a 30-day month? Show the calculation briefly.', max_output_tokens: 512, reasoning: { effort: 'high' }, }, ) console.log(response) ``` ```bash curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/v1/responses \ --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \ --header "Content-Type: application/json" \ --data '{ "model": "openai/gpt-6-astra", "input": "A service has 99.9% monthly availability and just had 31 minutes of downtime. Has it exceeded the monthly error budget for a 30-day month? Show the calculation briefly.", "max_output_tokens": 512, "reasoning": { "effort": "high" } }' ``` ``` No. For a 30-day month: - Total time: \(30 \times 24 \times 60 = 43{,}200\) minutes - Error budget: \(43{,}200 \times (1 - 0.999) = 43.2\) minutes - Remaining budget: \(43.2 - 31 = 12.2\) minutes Assuming 31 minutes is the total downtime this month, it is **within the error budget**. ``` ```json { "id": "resp_0f4dd4f38f19eb60016a99d9b6aaec87d1ab6bb0c344527fbc", "object": "response", "created_at": 1788467638, "model": "gpt-6-astra", "output": [ { "id": "rs_0f4dd4f38f19eb60016a99d9b77c6087d1ab41b79ccdf5a833", "type": "reasoning", "content": [], "encrypted_content": "gAAAAABqmdm5bNo3TE240J65AqELJf45m_Forsch1ik0e0iiz5B-XZsvljWjY5PfmKXyel-6WvdoKmKulsRo3PX0fCqdNQFUaSYufMITZh61KSdsWBeeKRAwczgj8ihQBEbSF95MmTwkoQzsHX5SBitcf0n7CrMhXt8-LcE2tXqY309dnpgzAtjeI8H318LR1JyAWKsbver3s30gE1TRh0GC3YisTLrfACSclHB8_cOPA5QvEwKJNljm8R7eVDJx7LTFoB2Av93eaSD7l4fbAJzR_afL8K_Akj5NsjYaZVrsbPPxTYlYpqRhE0c-3C2U0oJ31-4UVa6_nT94QYtnDJ9YNjEdRC8sMkq6DwLhkbIIJGVNJGqHmWP3vQu3JCq9VDUtC3ss3FCkgWwhIV5tAFTFOtppnHenz1Xi2UYwaBNwaHWYJdrTBidNcpEQwPcIdSRAfOHv2r-ueFywhAZmj8Rx_GcJO_5_RWjvglhuNRBTbC92icwLx6wt4LWYBpLW-0itkHNtdy2cqsiKYSxWyMRzaEwyhW3wQo6jC9w9MRUG35wT3drTsuvnMDV5yhtzCtxq57eTRpIpCM9343ITl5DUwS-d7vouI7QH2MAIkZknxTO-_vVPYVQrQ4Th0g6Cb8CrGd-nHQ39xYKnPG7oUmvRobLSaGpKmQREzp-uoQeVK8dypZCl3Xd1uHSUO7w-HKsob-t5whmpE-ziHFaqciWh9YcssC0YE1ztbq0f9tGRy386ZzkkihD23sGR0khZukCdiGSw3Njakpe4AMWujU-t2BtomDJa6pdtLEuvG7p3MbIbHRoXkyK-9h74NgBY2jO7fk0BgItjpmqhcPHelCtMxIhP_OroanM0rCUjfQdqcSBVxwOd_hJ5wcNHmWdyf3gVvKEO83M4cj-sVljJ1afzFfhFsAQH5Zw-JTeBI1udknm3oy5lDwEzRoZpTcQs2Ix8lyUBtZ4MypqRLTnKLXzyij8G8XdgTIqwUkOHhMrm8Zc0_ndcrwPoVjwTq0NugRGJMDAxPKl-aqg6XvEfCYCUF2WYIu8jGo3KK6An8GJ5HFLyidgUslKGJtN2TJmKBOPwc0fXoiW4qyUQdVi2Hz23KBMOQE77jIF0cccZAWDToq67zPLVw9I4j-VKRpti-tOfcg9tz0wr4zJRi49uOqTw038Xn03VXzTolhb3GwwQkMZxWLjam3buEX6SLuS1A7XXZn3aKeLu6KhUin6_aR3jP0s2_Y50Mjv3x0EouaIKQJEINqYRgi9K2SKAxzRSKjGksdNGNcNRGs6cydkHSJF-f60p9HRBbBsN7duP8qm0K2URSJ1DX30=", "summary": [] }, { "id": "msg_0f4dd4f38f19eb60016a99d9b7d7f087d191f17156c41c2f32", "type": "message", "status": "completed", "content": [ { "type": "output_text", "annotations": [], "logprobs": [], "text": "No. For a 30-day month:\n\n- Total time: \\(30 \\times 24 \\times 60 = 43{,}200\\) minutes\n- Error budget: \\(43{,}200 \\times (1 - 0.999) = 43.2\\) minutes\n- Remaining budget: \\(43.2 - 31 = 12.2\\) minutes\n\nAssuming 31 minutes is the total downtime this month, it is **within the error budget**." } ], "phase": "final_answer", "role": "assistant" } ], "status": "completed", "usage": { "input_tokens": 44, "output_tokens": 151, "total_tokens": 195, "input_tokens_details": { "cache_write_tokens": 0, "cached_tokens": 0 }, "output_tokens_details": { "reasoning_tokens": 41 } }, "access_programs": { "cyber": "standard" }, "background": false, "billing": { "payer": "developer" }, "completed_at": 1788467641, "error": null, "frequency_penalty": 0, "incomplete_details": null, "instructions": null, "max_output_tokens": 512, "max_tool_calls": null, "moderation": null, "parallel_tool_calls": true, "presence_penalty": 0, "previous_response_id": null, "prompt_cache_key": null, "prompt_cache_retention": "24h", "reasoning": { "context": "all_turns", "effort": "high", "mode": "standard", "summary": null }, "safety_identifier": null, "service_tier": "default", "store": false, "temperature": 1, "text": { "format": { "type": "text" }, "verbosity": "medium" }, "tool_choice": "auto", "tool_usage": { "image_gen": { "input_tokens": 0, "input_tokens_details": { "image_tokens": 0, "text_tokens": 0 }, "output_tokens": 0, "output_tokens_details": { "image_tokens": 0, "text_tokens": 0 }, "total_tokens": 0 }, "web_search": { "num_requests": 0 } }, "tools": [], "top_logprobs": 0, "top_p": 0.98, "truncation": "disabled", "user": null, "metadata": {}, "gatewayMetadata": { "keySource": "Unified" } } ``` ## Examples
**Migration Safeguards** — Generate a concise answer through Chat Completions ```ts const response = await env.AI.run( 'openai/gpt-6-astra', { messages: [ { role: 'user', content: 'List three practical safeguards for a production API migration.' }, ], max_completion_tokens: 256, }, ) 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": "openai/gpt-6-astra", "messages": [ { "role": "user", "content": "List three practical safeguards for a production API migration." } ], "max_completion_tokens": 256 }' ``` ``` 1. **Validate compatibility before rollout.** Run contract and integration tests against real client behaviors. Keep breaking changes behind a new API version, and verify authentication, error formats, and data schemas. 2. **Roll out gradually with monitoring.** Start with internal traffic or a small canary group. Track error rates, latency, and critical business metrics; pause expansion if predefined thresholds are exceeded. 3. **Prepare and test rollback.** Keep the old API available and use a feature flag or traffic switch to revert quickly. Ensure database changes remain backward-compatible, and rehearse the rollback procedure. ``` ```json { "id": "chatcmpl-EK8QDqH1XsfW6m8nEHXxUkrKGcWG5", "object": "chat.completion", "created": 1788467641, "model": "gpt-6-astra", "choices": [ { "index": 0, "message": { "role": "assistant", "content": "1. **Validate compatibility before rollout.** Run contract and integration tests against real client behaviors. Keep breaking changes behind a new API version, and verify authentication, error formats, and data schemas.\n\n2. **Roll out gradually with monitoring.** Start with internal traffic or a small canary group. Track error rates, latency, and critical business metrics; pause expansion if predefined thresholds are exceeded.\n\n3. **Prepare and test rollback.** Keep the old API available and use a feature flag or traffic switch to revert quickly. Ensure database changes remain backward-compatible, and rehearse the rollback procedure.", "refusal": null, "annotations": [] }, "finish_reason": "stop" } ], "usage": { "prompt_tokens": 16, "completion_tokens": 151, "total_tokens": 167, "prompt_tokens_details": { "cached_tokens": 0, "cache_write_tokens": 0, "audio_tokens": 0 }, "completion_tokens_details": { "reasoning_tokens": 23, "audio_tokens": 0, "accepted_prediction_tokens": 0, "rejected_prediction_tokens": 0 } }, "service_tier": "default", "system_fingerprint": null, "gatewayMetadata": { "keySource": "Unified" } } ```
## Parameters Schema variant ResponsesChat Completions ▶input `one of`required instructions `string` temperature `number`minimum: 0maximum: 2 max\_output\_tokens `number`exclusiveMinimum: 0 top\_p `number`minimum: 0maximum: 1 stream `boolean` ▶tools\[] `array` tool\_choice ▶text{} `object` ▶reasoning{} `object` ▶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`const: response created\_at `number` model `string` ▶output\[] `array` output\_text `string` status `string`enum: in\_progress, completed, failed, incomplete ▶usage{} `object` id `string` object `string` created `number` model `string` ▶choices\[] `array` ▶usage{} `object` ## API Schemas (Raw) Input [Open](https://developers.cloudflare.com/ai/models/openai/gpt-6-astra/schema-input.json) [Download](https://developers.cloudflare.com/ai/models/openai/gpt-6-astra/schema-input.json) Output [Open](https://developers.cloudflare.com/ai/models/openai/gpt-6-astra/schema-output.json) [Download](https://developers.cloudflare.com/ai/models/openai/gpt-6-astra/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/openai/gpt-6-astra/#page","headline":"GPT-6 Astra","description":"GPT-6 Astra is OpenAI's most capable model, built for complex reasoning, coding, computer use, research, and document creation.","url":"https://developers.cloudflare.com/ai/models/openai/gpt-6-astra/","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/"}} ```