--- title: Reflection: Beam 1.0 501B A23B | Text Generation | ModelsLab description: Build with Reflection: Beam 1.0 501B A23B API by Reflection. Text generation, chat, code, and reasoning. Plans from $21/month. url: https://modelslab.com/models/reflection/reflection-beam-1.0-501b-a23b.md canonical: https://modelslab.com/models/reflection/reflection-beam-1.0-501b-a23b type: product component: Playground/LLM/Index generated_at: 2026-10-17T14:26:10.541246Z --- Reflection: Beam 1.0 501B A23B --- [LLMs.txt](https://modelslab.com/models/reflection/reflection-beam-1.0-501b-a23b/llms.txt) [.md](https://modelslab.com/models/reflection/reflection-beam-1.0-501b-a23b.md) Reflection: Beam 1.0 501B A23B --- Choose a prompt below to get started or type your own message Explain quantum computing in simple terms Write a Python function to sort a list Create a marketing email for a SaaS product Compare REST vs GraphQL APIs text files Send ### Reflection: Beam 1.0 501B A23B reflection reflection-beam-1.0-501b-a23b Copy model ID PricingInput $1.00 / 1M tokens Output $3.00 / 1M tokens API EndpointsOpenAI Compatible `https://modelslab.com/api/v7/llm/chat/completions`Endpoint Anthropic Compatible `https://modelslab.com/api/v7/llm/v1/messages`Messages `https://modelslab.com/api/v7/llm/v1/messages/count_tokens`Count Tokens `https://modelslab.com/api/v7/llm/v1/models`Models Use with Claude Code cURL Example ParametersSystem MessageYou are a helpful AI assistant specialized in providing accurate and detailed responses. Temperature0.7 Max Tokens4000 Top P0.9 Frequency Penalty0 Presence Penalty0 Thinkinglow lowmediumhigh Deeper thinking spends more of the Max Tokens budget before the answer starts. Model Info Support Looking for something different? --- Models that trade off differently against the one you are viewing ### Better quality Newer flagship models that generally produce stronger results. [OpenAI](https://modelslab.com/models/openai) [GPT 5.2](https://modelslab.com/models/openai/gpt-5.2) [OpenAI](https://modelslab.com/models/openai) [GPT 5.1](https://modelslab.com/models/openai/gpt5.1) [Google](https://modelslab.com/models/google) [Gemini 3 Pro Preview](https://modelslab.com/models/google/gemini-3-pro-preview) [OpenAI](https://modelslab.com/models/openai) [GPT-5.1-Codex-Max](https://modelslab.com/models/openai/gpt-5.1-codex-max) ### Lower cost per run Open-source models we host, unlimited on the $149/month plan. 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It uses a sparse mixture-of-experts architecture with 501B total and 23B active parameters per token, and a... ### Technical Specifications Model IDreflection-beam-1.0-501b-a23b CategoryLLM Models TaskText Generation Price$2 per million tokens AddedOctober 16, 2026 ### Key Features - Chat completion and multi-turn conversation API - Streaming response with token-by-token output - Function calling and tool use support - System prompts and role-based messaging - JSON mode and structured output ### Quick Start Integrate Reflection: Beam 1.0 501B A23B into your application with a single API call. Get your API key from the [pricing page](https://modelslab.com/pricing) to get started. PythonJavaScriptcURLPHP ``` import requests import json url = "https://modelslab.com/api/v7/llm/chat/completions" headers = { "Content-Type": "application/json" } data = { "model_id": "reflection-beam-1.0-501b-a23b", "messages": [ { "role": "user", "content": "Hello!" } ], "max_tokens": 1000, "key": "YOUR_API_KEY" } try: response = requests.post(url, headers=headers, json=data) response.raise_for_status() # Raises an HTTPError for bad responses (4XX or 5XX) result = response.json() print("API Response:") print(json.dumps(result, indent=2)) except requests.exceptions.HTTPError as http_err: print(f"HTTP error occurred: {http_err} - {response.text}") except Exception as err: print(f"Other error occurred: {err}") ``` ### Pricing Reflection: Beam 1.0 501B A23B API costs $2 per million tokens. Plans start at $21/month, and open-source models are unlimited on the $149/month plan. [View pricing plans](https://modelslab.com/pricing) ### Use Cases - AI chatbots and virtual assistants - Code generation and developer tools - Content writing and copywriting automation - Data analysis, summarization, and extraction [Browse LLM Models](https://modelslab.com/models?feature=llmaster) [More from Reflection](https://modelslab.com/models/open_router) [View Pricing](https://modelslab.com/pricing) Reflection: Beam 1.0 501B A23B FAQ --- ### What is Reflection: Beam 1.0 501B A23B? Beam 1.0 is Reflection's open-weight reasoning model for coding and long-horizon agentic workflows. It uses a sparse mixture-of-experts architecture with 501B total and 23B active parameters per token, and a... ### How do I use the Reflection: Beam 1.0 501B A23B API? You can integrate Reflection: Beam 1.0 501B A23B into your application with a single API call. Sign up on ModelsLab to get your API key, then use the model ID "reflection-beam-1.0-501b-a23b" in your API requests. We provide SDKs for Python, JavaScript, and cURL examples in the API documentation. ### How much does Reflection: Beam 1.0 501B A23B cost? Reflection: Beam 1.0 501B A23B costs $2 per million tokens. ModelsLab plans start at $21/month (Basic), and the $149/month Open Source plan includes unlimited generation on open-source models. ### What is the Reflection: Beam 1.0 501B A23B model ID? The model ID for Reflection: Beam 1.0 501B A23B is "reflection-beam-1.0-501b-a23b". Use this ID in your API requests to specify this model. ### Do I need a paid plan to use Reflection: Beam 1.0 501B A23B? Yes. ModelsLab is subscription-based with no free tier — plans start at $21/month (Basic, 3,250 API calls). The $149/month Open Source Unlimited plan includes unlimited generation across open-source models; premium third-party models are billed per call from your wallet. --- *This markdown version is optimized for AI agents and LLMs.* **Links:** - [Website](https://modelslab.com) - [API Documentation](https://docs.modelslab.com) - [Blog](https://modelslab.com/blog) --- *Generated by ModelsLab - 2026-10-17*