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Reflection: Beam 1.0 501B A23B

Source description (English)

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...

Overview

Model specifications

Context
1,048,576 tokens
Maximum output
131,072 tokens
Architecture
text->text
Tokenizer
Other
Knowledge cutoff
2026-06-30
Moderated
No
OPENROUTER

Complete pricing

Synchronized OpenRouter rates. Token prices are shown per one million tokens.

Input
$0.25
per 1M tokens
Output
$1
per 1M tokens
Cache read
$0.05
per 1M tokens
API

Model configuration

Reasoning

Reasoning required
Yes
Default parameters
max
Capabilities
max, xhigh, high, medium, low
API

Quick start

Set OPENROUTER_API_KEY locally. Python requires requests; JavaScript runs in Node.js. Keep the key on the server.

API documentation

curl --fail-with-body https://openrouter.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $OPENROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"reflection/beam-1.0-501b-a23b","messages":[{"role":"user","content":"Hello!"}]}'
Capabilities

Input → Output

Input
text
Output
text
Reasoning

No · max · xhigh · high · medium · low

API

Supported API parameters

frequency_penaltyinclude_reasoninglogit_biaslogprobsmax_tokensmin_ppresence_penaltyreasoningreasoning_effortrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_ktop_logprobstop_p
Available providers

4 providers

Checked: October 22, 2026

Live providers on OpenRouter

Provider availability, latency, throughput and routing can change continuously. Open the source page for current operational data.

OpenRouter

Nebius

fp8
Context
1.0M
Maximum output
131K
Input
$0.25
Output
$1
Cache read
$0.05
Cache write
Not provided

CoreWeave

fp4
Context
1.0M
Maximum output
944K
Input
$0.3
Output
$1
Cache read
$0.04
Cache write
Not provided

BaseTen

fp4
Context
1.0M
Maximum output
131K
Input
$0.4
Output
$1.2
Cache read
$0.04
Cache write
Not provided

Together

Not provided
Context
1.0M
Maximum output
131K
Input
$0.4
Output
$1.2
Cache read
$0.04
Cache write
Not provided