# Beam 1.0 501B A23B

Canonical page: https://agentsky.dev/models/reflection/beam-1.0-501b-a23b
JSON record: https://gateway.agentsky.dev/v1/models/reflection/beam-1.0-501b-a23b

Beam 1.0 501B A23B is a text-input model by Reflection, available through the AgentSky API as reflection/beam-1.0-501b-a23b at $0.4642 per million input tokens and $1.3926 per million output tokens, with a 1M context window.

Beam 1.0 is Reflection's open-weight reasoning model for coding and long-horizon agentic workflows.

## Facts

- **Model id:** `reflection/beam-1.0-501b-a23b`
- **Maker:** Reflection
- **Input modalities:** Text
- **Context:** 1M
- **Max output tokens:** 943,718
- **Aliases:** `reflection/beam-1.0-501b-a23b`, `beam-1.0-501b-a23b`

## Pricing

USD per million tokens on the default plan. Signed-in pages show your own plan's price; every response carries the cost of that call in `usage.cost`.

| Meter | Per 1M tokens |
|---|---|
| Input | $0.4642 |
| Output | $1.3926 |
| Cache read | $0.058025 |
| Cache write | $0.4642 |

## Use it

Anthropic wire base URL: `https://gateway.agentsky.dev`. OpenAI wire base URL: `https://gateway.agentsky.dev/v1`. Authenticate with an AgentSky API key (`ast_…`) and pass the model id.

### OpenAI SDK

```js
import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://gateway.agentsky.dev/v1",
  apiKey: process.env.AGENTSKY_API_KEY, // ast_…
});

const completion = await client.chat.completions.create({
  model: "reflection/beam-1.0-501b-a23b",
  messages: [{ role: "user", content: "Summarise this ticket." }],
});
console.log(completion.usage.cost); // USD, in the response
```

### Codex

```bash
export OPENAI_BASE_URL="https://gateway.agentsky.dev/v1"
export OPENAI_API_KEY="$AGENTSKY_API_KEY"

codex --model reflection/beam-1.0-501b-a23b
```

### OpenCode

```js
// opencode.json — then switch models any time with /models
{
  "$schema": "https://opencode.ai/config.json",
  "provider": {
    "agentsky": {
      "npm": "@ai-sdk/openai-compatible",
      "name": "AgentSky",
      "options": {
        "baseURL": "https://gateway.agentsky.dev/v1",
        "apiKey": "{env:AGENTSKY_API_KEY}"
      },
      "models": { "reflection/beam-1.0-501b-a23b": {} }
    }
  }
}
```

## Questions

### What is Beam 1.0 501B A23B?

Beam 1.0 501B A23B is a model from Reflection. Beam 1.0 is Reflection's open-weight reasoning model for coding and long-horizon agentic workflows.

### How much does Beam 1.0 501B A23B cost?

$0.4642 / $1.3926 per million tokens at the prices shown, for input and output respectively. The exact price of every call comes back in the response as usage.cost, so you never have to compute it.

### What is the context length of Beam 1.0 501B A23B?

1M tokens, and it writes up to 944K tokens in one reply. These are the limits listed for this model in the current AgentSky catalog.

### Which clients can call Beam 1.0 501B A23B?

Anything that speaks the OpenAI-compatible request format. Point the client's base URL at the gateway, use an AgentSky key, and pass reflection/beam-1.0-501b-a23b as the model.

### How do I name Beam 1.0 501B A23B in a request?

The gateway accepts reflection/beam-1.0-501b-a23b, beam-1.0-501b-a23b. Any of them resolves to the same model, so an existing integration usually needs no change to its model string.

### Can Beam 1.0 501B A23B read images?

No image input is listed for this model. Its supported input types are text. For screenshots or photographs, choose a model that lists image input.

### What output can Beam 1.0 501B A23B produce?

The listed output types are text. This model returns text. Producing image, video or audio files requires a suitable tool or another model; it is not included in text generation.

### How should I plan a long prompt for Beam 1.0 501B A23B?

Plan your instructions, conversation history and source material around the 1M-token context limit, leaving room for the response. The listed response ceiling is 944K tokens. A larger window lets you supply more relevant material; it does not make unrelated content useful.

### What would 10,000 input tokens and 2,000 output tokens cost with Beam 1.0 501B A23B?

At the displayed input and output rates, the model-token subtotal is $0.0074272. This example assumes uncached input and excludes additional pricing categories, tool calls and agent runtime. Actual usage determines the final charge.

### How is cached input priced for Beam 1.0 501B A23B?

The catalog lists $0.058025 per million cache-read tokens. Cache writes are listed at $0.4642 per million tokens. Repeating a prompt does not by itself guarantee a cache hit; only usage reported as cached receives that rate.

### Does the Beam 1.0 501B A23B token price cover an entire agent task?

No. The model price covers the model usage described above. A task can also incur tool and runtime charges, and several model calls may be needed to complete it. Compare total task usage when evaluating cost.

### How do I use Beam 1.0 501B A23B on AgentSky?

The composer above preselects Beam 1.0 501B A23B for a compatible agent. Enter a concrete task, select any tools or connectors it needs, and send. Sign in if prompted; paid execution requires available credits.