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Reflection: Beam 1.0 501B A23B

beam-1.0

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Beam 1.0 501B A23B costs $0.650 per million input tokens and $1.95 per million output tokens, supports 1.05M context, and is available through the OpenAI-compatible API.

Reflection's Apache 2.0 open-weight text model with 501.3B total and 23.4B active parameters, built for coding, reasoning and tool use. It supports a shared 1,048,576-token context window, up to 131,072 output tokens, JSON mode and structured output. Knowledge cutoff: June 30, 2026.

Modalities

Text → Text

Input / output price

$0.650 / $1.95 per 1M

Context

1.05M · max output 131K

Capabilities

ReasoningTool callingLong contextOpen weights

Pricing

Billed per token actually used and deducted from your credits.

ItemUSD per 1M tokens
Input$0.650
Output$1.95
Cached input$0.065

Calculator

Drag the sliders to estimate what this model will cost.

Per request
$0.00351
Per day
$1.76
Per month (30 days)
$52.65

Beam 1.0 501B A23B: input $0.65/M · output $1.95/M · cached input $0.065/M

Request with these settings
curl https://api.geniusrelaygpt.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "beam-1.0", "max_tokens": 800,
       "messages": [{"role": "user", "content": "…"}]}'

Code samples

OpenAI-compatible. Set the base URL to https://api.geniusrelaygpt.com/v1 and the model to beam-1.0.

curl https://api.geniusrelaygpt.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "beam-1.0",
    "stream": true,
    "messages": [{"role": "user", "content": "Hello"}]
  }'

Use it in a client: Cursor · Cline · SillyTavern · Codex

Parameters

Common OpenAI parameters can be passed as-is.

temperaturetop_pmax_tokensstreamstoppresence_penaltyfrequency_penaltyseed

FAQ

How is Beam 1.0 501B A23B billed?
Input is $0.650 and output is $1.95 per million tokens; cached input is $0.065. The charge for every request is listed in Usage Logs in the console.
How long is the context window?
1.05M tokens. In a long conversation every turn is billed for the full input, so keep the history under control.
Does it support streaming?
Yes. Add "stream": true to the request to receive server-sent events in the OpenAI format.
Beam 1.0 501B A23B API pricing · GeniusRelay