{
	"model_id": "reflection-ai/beam-1.0-501b-a23b",
	"provider_id": "reflection-ai",
	"name": "Beam 1.0 501B A23B",
	"description": "Beam-1.0-501B-A23B is Reflection AI's open-weights mixture-of-experts model with 501B total parameters and 23B active parameters, built for coding, reasoning, and agentic workloads.",
	"task": "Text Generation",
	"tags": [
		"Text Generation",
		"Coding",
		"Reasoning",
		"Tool Calling",
		"Agentic",
		"MoE"
	],
	"context_length": 262144,
	"max_output_tokens": 131072,
	"schema_version": "1.0.0",
	"pricing": {
		"Input tokens (per 1M)": 0,
		"Cached input tokens (per 1M)": 0,
		"Output tokens (per 1M)": 0
	},
	"examples": [
		{
			"name": "Simple answer",
			"description": "Generate a concise answer with low reasoning effort",
			"input": {
				"messages": [
					{
						"role": "user",
						"content": "Explain why the sky is blue in one sentence."
					}
				],
				"max_completion_tokens": 256,
				"reasoning_effort": "low"
			},
			"output": {
				"text": "The sky is blue because sunlight undergoes Rayleigh scattering in the atmosphere, which preferentially redirects shorter blue wavelengths toward your eyes."
			},
			"raw_response": {
				"id": "chatcmpl-002d24bd-de9c-4bab-947d-47f77166eb5c",
				"object": "chat.completion",
				"created": 1792089654,
				"model": "reflection-ai/beam-1.0-501b-a23b",
				"choices": [
					{
						"index": 0,
						"message": {
							"role": "assistant",
							"content": "The sky is blue because sunlight undergoes Rayleigh scattering in the atmosphere, which preferentially redirects shorter blue wavelengths toward your eyes.",
							"refusal": null,
							"reasoning_content": "The user asks: \"Explain why the sky is blue in one sentence.\" Straightforward. Need one sentence. Ensure accuracy: Rayleigh scattering scatters shorter blue wavelengths more. Provide concise. No safety issues."
						},
						"finish_reason": "stop",
						"logprobs": null
					}
				],
				"usage": {
					"prompt_tokens": 506,
					"completion_tokens": 79,
					"total_tokens": 585,
					"prompt_tokens_details": {
						"cached_tokens": 448
					},
					"completion_tokens_details": {
						"reasoning_tokens": 50
					}
				}
			},
			"code_snippets": [
				{
					"label": "typescript",
					"language": "typescript",
					"code": "const response = await env.AI.run(\n  'reflection-ai/beam-1.0-501b-a23b',\n  {\n    messages: [{ role: 'user', content: 'Explain why the sky is blue in one sentence.' }],\n    max_completion_tokens: 256,\n    reasoning_effort: 'low',\n  },\n)\nconsole.log(response)"
				},
				{
					"label": "curl",
					"language": "bash",
					"code": "curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/v1/chat/completions \\\n  --header \"Authorization: Bearer $CLOUDFLARE_API_TOKEN\" \\\n  --header \"Content-Type: application/json\" \\\n  --data '{\n  \"model\": \"reflection-ai/beam-1.0-501b-a23b\",\n  \"messages\": [\n    {\n      \"role\": \"user\",\n      \"content\": \"Explain why the sky is blue in one sentence.\"\n    }\n  ],\n  \"max_completion_tokens\": 256,\n  \"reasoning_effort\": \"low\"\n}'"
				}
			]
		},
		{
			"name": "Structured project status",
			"description": "Return a typed project status summary using structured output",
			"input": {
				"messages": [
					{
						"role": "user",
						"content": "Summarize this project update: API integration is complete, security review is scheduled for Friday, and the mobile client is blocked on final design assets."
					}
				],
				"max_completion_tokens": 512,
				"response_format": {
					"type": "json_schema",
					"json_schema": {
						"name": "project_status",
						"strict": true,
						"schema": {
							"type": "object",
							"properties": {
								"overall_status": {
									"type": "string",
									"enum": [
										"on_track",
										"at_risk",
										"blocked"
									]
								},
								"completed": {
									"type": "array",
									"items": {
										"type": "string"
									}
								},
								"next_steps": {
									"type": "array",
									"items": {
										"type": "string"
									}
								},
								"blockers": {
									"type": "array",
									"items": {
										"type": "string"
									}
								}
							},
							"required": [
								"overall_status",
								"completed",
								"next_steps",
								"blockers"
							],
							"additionalProperties": false
						}
					}
				}
			},
			"output": {
				"text": "{\"overall_status\": \"on_track\",\n\"completed\": [\"API integration\"],\n\"next_steps\": [\"Security review scheduled for Friday\"],\n\"blockers\": [\"Mobile client awaiting final design assets\"]}"
			},
			"raw_response": {
				"id": "chatcmpl-781353f2-706b-4d56-b771-c785968bbf97",
				"object": "chat.completion",
				"created": 1792089661,
				"model": "reflection-ai/beam-1.0-501b-a23b",
				"choices": [
					{
						"index": 0,
						"message": {
							"role": "assistant",
							"content": "{\"overall_status\": \"on_track\",\n\"completed\": [\"API integration\"],\n\"next_steps\": [\"Security review scheduled for Friday\"],\n\"blockers\": [\"Mobile client awaiting final design assets\"]}",
							"refusal": null,
							"reasoning_content": "The user wants a summary of a project update. Straightforward. Just summarize."
						},
						"finish_reason": "stop",
						"logprobs": null
					}
				],
				"usage": {
					"prompt_tokens": 527,
					"completion_tokens": 64,
					"total_tokens": 591,
					"prompt_tokens_details": {
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						"reasoning_tokens": 18
					}
				}
			},
			"code_snippets": [
				{
					"label": "typescript",
					"language": "typescript",
					"code": "const response = await env.AI.run(\n  'reflection-ai/beam-1.0-501b-a23b',\n  {\n    messages: [\n      {\n        role: 'user',\n        content:\n          'Summarize this project update: API integration is complete, security review is scheduled for Friday, and the mobile client is blocked on final design assets.',\n      },\n    ],\n    max_completion_tokens: 512,\n    response_format: {\n      type: 'json_schema',\n      json_schema: {\n        name: 'project_status',\n        strict: true,\n        schema: {\n          type: 'object',\n          properties: {\n            overall_status: { type: 'string', enum: ['on_track', 'at_risk', 'blocked'] },\n            completed: { type: 'array', items: { type: 'string' } },\n            next_steps: { type: 'array', items: { type: 'string' } },\n            blockers: { type: 'array', items: { type: 'string' } },\n          },\n          required: ['overall_status', 'completed', 'next_steps', 'blockers'],\n          additionalProperties: false,\n        },\n      },\n    },\n  },\n)\nconsole.log(response)"
				},
				{
					"label": "curl",
					"language": "bash",
					"code": "curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/v1/chat/completions \\\n  --header \"Authorization: Bearer $CLOUDFLARE_API_TOKEN\" \\\n  --header \"Content-Type: application/json\" \\\n  --data '{\n  \"model\": \"reflection-ai/beam-1.0-501b-a23b\",\n  \"messages\": [\n    {\n      \"role\": \"user\",\n      \"content\": \"Summarize this project update: API integration is complete, security review is scheduled for Friday, and the mobile client is blocked on final design assets.\"\n    }\n  ],\n  \"max_completion_tokens\": 512,\n  \"response_format\": {\n    \"type\": \"json_schema\",\n    \"json_schema\": {\n      \"name\": \"project_status\",\n      \"strict\": true,\n      \"schema\": {\n        \"type\": \"object\",\n        \"properties\": {\n          \"overall_status\": {\n            \"type\": \"string\",\n            \"enum\": [\n              \"on_track\",\n              \"at_risk\",\n              \"blocked\"\n            ]\n          },\n          \"completed\": {\n            \"type\": \"array\",\n            \"items\": {\n              \"type\": \"string\"\n            }\n          },\n          \"next_steps\": {\n            \"type\": \"array\",\n            \"items\": {\n              \"type\": \"string\"\n            }\n          },\n          \"blockers\": {\n            \"type\": \"array\",\n            \"items\": {\n              \"type\": \"string\"\n            }\n          }\n        },\n        \"required\": [\n          \"overall_status\",\n          \"completed\",\n          \"next_steps\",\n          \"blockers\"\n        ],\n        \"additionalProperties\": false\n      }\n    }\n  }\n}'"
				}
			]
		},
		{
			"name": "Weather tool call",
			"description": "Choose a weather lookup function and supply its arguments",
			"input": {
				"messages": [
					{
						"role": "user",
						"content": "What is the weather in Lisbon today?"
					}
				],
				"max_completion_tokens": 256,
				"tool_choice": "required",
				"tools": [
					{
						"type": "function",
						"function": {
							"name": "get_weather",
							"description": "Look up the current weather for a city.",
							"parameters": {
								"type": "object",
								"properties": {
									"city": {
										"type": "string"
									},
									"units": {
										"type": "string",
										"enum": [
											"celsius",
											"fahrenheit"
										]
									}
								},
								"required": [
									"city",
									"units"
								],
								"additionalProperties": false
							}
						}
					}
				]
			},
			"output": {
				"tool_calls": [
					{
						"id": "call-c105de7f-4e34-4ce9-bab9-ef2e6a89b645",
						"type": "function",
						"function": {
							"name": "get_weather",
							"arguments": "{\"city\": \"Lisbon\", \"units\": \"celsius\"}"
						}
					}
				]
			},
			"raw_response": {
				"id": "chatcmpl-fda9d6ad-dcb0-4b60-9e5a-4d78f406ecc1",
				"object": "chat.completion",
				"created": 1792089672,
				"model": "reflection-ai/beam-1.0-501b-a23b",
				"choices": [
					{
						"index": 0,
						"message": {
							"role": "assistant",
							"content": null,
							"tool_calls": [
								{
									"id": "call-c105de7f-4e34-4ce9-bab9-ef2e6a89b645",
									"type": "function",
									"function": {
										"name": "get_weather",
										"arguments": "{\"city\": \"Lisbon\", \"units\": \"celsius\"}"
									}
								}
							],
							"refusal": null,
							"reasoning_content": "The user is asking about the weather in Lisbon today. I have a tool to get weather. Let me call it with city Lisbon and units... the user didn't specify units. Celsius is reasonable default, but maybe I should pick. Let me use celsius as default. Actually, let me just call."
						},
						"finish_reason": "tool_calls",
						"logprobs": null
					}
				],
				"usage": {
					"prompt_tokens": 544,
					"completion_tokens": 92,
					"total_tokens": 636,
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					}
				}
			},
			"code_snippets": [
				{
					"label": "typescript",
					"language": "typescript",
					"code": "const response = await env.AI.run(\n  'reflection-ai/beam-1.0-501b-a23b',\n  {\n    messages: [{ role: 'user', content: 'What is the weather in Lisbon today?' }],\n    max_completion_tokens: 256,\n    tool_choice: 'required',\n    tools: [\n      {\n        type: 'function',\n        function: {\n          name: 'get_weather',\n          description: 'Look up the current weather for a city.',\n          parameters: {\n            type: 'object',\n            properties: {\n              city: { type: 'string' },\n              units: { type: 'string', enum: ['celsius', 'fahrenheit'] },\n            },\n            required: ['city', 'units'],\n            additionalProperties: false,\n          },\n        },\n      },\n    ],\n  },\n)\nconsole.log(response)"
				},
				{
					"label": "curl",
					"language": "bash",
					"code": "curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/v1/chat/completions \\\n  --header \"Authorization: Bearer $CLOUDFLARE_API_TOKEN\" \\\n  --header \"Content-Type: application/json\" \\\n  --data '{\n  \"model\": \"reflection-ai/beam-1.0-501b-a23b\",\n  \"messages\": [\n    {\n      \"role\": \"user\",\n      \"content\": \"What is the weather in Lisbon today?\"\n    }\n  ],\n  \"max_completion_tokens\": 256,\n  \"tool_choice\": \"required\",\n  \"tools\": [\n    {\n      \"type\": \"function\",\n      \"function\": {\n        \"name\": \"get_weather\",\n        \"description\": \"Look up the current weather for a city.\",\n        \"parameters\": {\n          \"type\": \"object\",\n          \"properties\": {\n            \"city\": {\n              \"type\": \"string\"\n            },\n            \"units\": {\n              \"type\": \"string\",\n              \"enum\": [\n                \"celsius\",\n                \"fahrenheit\"\n              ]\n            }\n          },\n          \"required\": [\n            \"city\",\n            \"units\"\n          ],\n          \"additionalProperties\": false\n        }\n      }\n    }\n  ]\n}'"
				}
			]
		},
		{
			"name": "Scheduling reasoning",
			"description": "Reason through a scheduling constraint with system guidance",
			"input": {
				"messages": [
					{
						"role": "system",
						"content": "Answer concisely and show the scheduling logic in two bullet points."
					},
					{
						"role": "user",
						"content": "Maya is available Monday and Wednesday. Theo is available Wednesday and Thursday. Priya is available Monday, Wednesday, and Friday. Which day should they schedule a 90-minute meeting, and why?"
					},
					{
						"role": "user",
						"content": "The meeting must include all three attendees."
					},
					{
						"role": "user",
						"content": "Please give the recommendation."
					}
				],
				"max_completion_tokens": 384,
				"reasoning_effort": "medium"
			},
			"output": {
				"text": "- All three must attend, so the meeting day must be in the intersection of Maya's (Mon, Wed), Theo's (Wed, Thu), and Priya's (Mon, Wed, Fri) calendars; only Wednesday appears for all three.\n- Therefore, schedule the 90-minute meeting on Wednesday, since it is the only day all attendees are available."
			},
			"raw_response": {
				"id": "chatcmpl-26cd51e7-33f7-4048-93f0-69f51b1c66cc",
				"object": "chat.completion",
				"created": 1792089681,
				"model": "reflection-ai/beam-1.0-501b-a23b",
				"choices": [
					{
						"index": 0,
						"message": {
							"role": "assistant",
							"content": "- All three must attend, so the meeting day must be in the intersection of Maya's (Mon, Wed), Theo's (Wed, Thu), and Priya's (Mon, Wed, Fri) calendars; only Wednesday appears for all three.\n- Therefore, schedule the 90-minute meeting on Wednesday, since it is the only day all attendees are available.",
							"refusal": null,
							"reasoning_content": "The user asks: Maya available Mon/Wed, Theo available Wed/Thu, Priya available Mon/Wed/Fri. Meeting must include all three. Need schedule 90-min meeting. Which day should schedule and why? Concise, two bullet points showing scheduling logic. Constraints: all three must attend. Intersection: Maya \u2229 Theo = Wed; Priya \u2229 {Wed} = Wed. So Wednesday is common day. Need 90-minute meeting\u2014presumably available all day? No time specifics. So recommend Wednesday; only day all three available. Answer with two bullet points.\n\nNeed ensure not violate policy. Fine.\n\nLet's craft concise."
						},
						"finish_reason": "stop",
						"logprobs": null
					}
				],
				"usage": {
					"prompt_tokens": 572,
					"completion_tokens": 218,
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			"code_snippets": [
				{
					"label": "typescript",
					"language": "typescript",
					"code": "const response = await env.AI.run(\n  'reflection-ai/beam-1.0-501b-a23b',\n  {\n    messages: [\n      {\n        role: 'system',\n        content: 'Answer concisely and show the scheduling logic in two bullet points.',\n      },\n      {\n        role: 'user',\n        content:\n          'Maya is available Monday and Wednesday. Theo is available Wednesday and Thursday. Priya is available Monday, Wednesday, and Friday. Which day should they schedule a 90-minute meeting, and why?',\n      },\n      { role: 'user', content: 'The meeting must include all three attendees.' },\n      { role: 'user', content: 'Please give the recommendation.' },\n    ],\n    max_completion_tokens: 384,\n    reasoning_effort: 'medium',\n  },\n)\nconsole.log(response)"
				},
				{
					"label": "curl",
					"language": "bash",
					"code": "curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/v1/chat/completions \\\n  --header \"Authorization: Bearer $CLOUDFLARE_API_TOKEN\" \\\n  --header \"Content-Type: application/json\" \\\n  --data '{\n  \"model\": \"reflection-ai/beam-1.0-501b-a23b\",\n  \"messages\": [\n    {\n      \"role\": \"system\",\n      \"content\": \"Answer concisely and show the scheduling logic in two bullet points.\"\n    },\n    {\n      \"role\": \"user\",\n      \"content\": \"Maya is available Monday and Wednesday. Theo is available Wednesday and Thursday. Priya is available Monday, Wednesday, and Friday. Which day should they schedule a 90-minute meeting, and why?\"\n    },\n    {\n      \"role\": \"user\",\n      \"content\": \"The meeting must include all three attendees.\"\n    },\n    {\n      \"role\": \"user\",\n      \"content\": \"Please give the recommendation.\"\n    }\n  ],\n  \"max_completion_tokens\": 384,\n  \"reasoning_effort\": \"medium\"\n}'"
				}
			]
		}
	],
	"default_example": null,
	"code_snippets": [],
	"supports_async": false,
	"zdr": true,
	"zdr_comment": null,
	"external_info": "https://developers.reflection.ai/models",
	"terms": "https://developers.reflection.ai/introduction",
	"cover_image_url": null,
	"metadata": {
		"Architecture": "Mixture-of-Experts (MoE)",
		"Context Window": "256K tokens",
		"Max Output": "128K tokens",
		"Parameters": "501B total, 23B active",
		"Reasoning": "Always on",
		"fedrampAvailable": "true"
	},
	"request_formats": [
		"chat-completions"
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	"created_at": "2026-10-16 13:57:23",
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							},
							"content": {
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				"stream_options": {
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					},
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				},
				"tools": {
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				"modalities": {
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				"audio": {
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								"opus",
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						}
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				"reasoning_effort": {
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														"type": "string"
													},
													"data": {
														"type": "string"
													},
													"expires_at": {
														"type": "number"
													},
													"transcript": {
														"type": "string"
													}
												},
												"additionalProperties": {}
											},
											{
												"type": "null"
											}
										]
									}
								},
								"required": [
									"role"
								],
								"additionalProperties": {}
							},
							"finish_reason": {
								"type": [
									"string",
									"null"
								]
							}
						},
						"required": [
							"index",
							"message",
							"finish_reason"
						],
						"additionalProperties": {}
					}
				},
				"usage": {
					"type": "object",
					"properties": {
						"prompt_tokens": {
							"type": "number"
						},
						"completion_tokens": {
							"type": "number"
						},
						"total_tokens": {
							"type": "number"
						}
					},
					"required": [
						"prompt_tokens",
						"completion_tokens",
						"total_tokens"
					],
					"additionalProperties": {}
				}
			},
			"required": [
				"id",
				"object",
				"created",
				"model",
				"choices"
			],
			"additionalProperties": {}
		}
	}
}