Beam 1.0 501B A23B

Name: Reflection: Beam 1.0 501B A23B
Brand: reflection
SKU: reflection/beam-1.0-501b-a23b
Price: 1.1 USD
Availability: InStock

reflection/beam-1.0-501b-a23b

Holders first until 2026-10-23

about 0.2¢ a message

A typical message: about 500 tokens you send and 500 it writes.

$1.10 per 1M tokens you send$3.30 per 1M tokens it writesreads 1M tokens at once

Published capabilitiestool callingjson schema

Chat with Beam 1.0 501B A23B Call it from code Lock this price

About

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...

In Reflection's words.

Try it here

Cmd+Enter sends

Whatever it says appears here.

Published facts

What the upstream's catalog says about this world, with its price as billed here.

Context window: 1,048,576 tokens
Longest answer: 943,718 tokens
Input, per 1M tokens: $1.10upstream $1.00
Output, per 1M tokens: $3.30upstream $3.00
Cached input, per 1M: $0.11upstream $0.10
Margin: +10%
Reads: text
First listed: 2026-10-16

Price and latency history as JSON: GET /api/planet/history?id=reflection/beam-1.0-501b-a23b.

Measured here

Price

it writes $3.30 you send $1.10max $3.30

2026-10-16now

The price per 1M tokens as billed here: each rate the upstream published, as this deployment observed it, with today's markup applied where the operator set one. First seen 2026-10-16, 1 change since. Nothing before the first observation is shown, because nothing before it was seen.

Call it

One OpenAI compatible endpoint, this model's id, and an am_live_ key from the dashboard. Or try it in chat first, no key needed.

curl https://useantimatter.com/v1/chat/completions \
  -H "Authorization: Bearer $ANTIMATTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "reflection/beam-1.0-501b-a23b", "messages": [{"role": "user", "content": "Hello"}]}'

Everything else is in the docs.

Embed this

A badge with this world's live price per million tokens, as billed here, for a README or a site. It links back to this page.

<a href="https://useantimatter.com/planet/reflection/beam-1.0-501b-a23b"><img src="https://useantimatter.com/api/badge/price?id=reflection%2Fbeam-1.0-501b-a23b" alt="Beam 1.0 501B A23B price on Antimatter" height="28"></a>

Similar worlds, other makers

Closest in price and memory, from other vendors.

Head back to the galaxy, or carry this world into a thread.

Observed	You send	It writes	Cache read	Cache write
2026-10-16	$0.275	$1.10	unpublished	unpublished
2026-10-16	$1.10	$3.30	$0.11	unpublished