Beam 1.0 501B A23B is Reflection's language model with a 1.0M context window and up to 944K output tokens, available from 4 providers, starting at $0.25 / 1M input and $1.00 / 1M output. A large mixture-of-experts reasoning model with 501B total and 23B active parameters, built for coding and agentic workflows.
| Specifications | |
|---|---|
reflection-beam-1-501b-a23b | |
| Language | |
| Active | |
| Reflection | |
| 1.0M tokens | |
| 944K tokens | |
| Text | |
| Text | |
| default | |
| 501B | |
| 172 | |
| 2,097 | |
| 2,097 | |
| · 18 days ago | |
| · 4 months ago | |
Capabilities
Input1/5
Text✓
Image·
Audio·
Video·
PDF·
Output1/5
Text✓
Image·
Audio·
Video·
Embedding·
Capabilities5/13
Reasoning✓
Adaptive Reasoning·
Function Calling✓
Parallel Function Calling·
Structured Outputs✓
Native JSON Schema✓
Web Search·
URL Context·
Computer Use·
Code Execution·
File Search·
Prompt Caching✓
Assistant Prefill·
Pricing by Provider
US Dollar ($)
Per 1M tokens
| Provider | Standard | ||
|---|---|---|---|
| Input $ / 1M | Output $ / 1M | Cache Read $ / 1M | |
| $0.4 | $1.20 | N/A | |
| $0.25 | $1.00 | $0.05 | |
| $0.4 | $1.20 | $0.04 | |
| $1.00 | $3.00 | $0.1 | |
Cost Calculator
US Dollar ($)
Preset:
Cheapest Instances to Run It
Cloud GPU instances that can host Beam 1.0 501B A23B, ranked by cheapest on-demand price. The model needs about 1202 GB of GPU memory at FP16 precision (estimated from its parameter count), so treat the fit as guidance rather than a guarantee.
All clouds
FP16 (full precision)
US Dollar ($)
Instance | Cloud | GPU | VRAM | Price | Cheapest region | |
|---|---|---|---|---|---|---|
| Standard_ND96is_MI300X_v5 |  Azure | 8× AMD Instinct MI300X GPU (192GB) | 1536 GB | $48.00/hr | ||
| Standard_ND96isr_MI300X_v5 | Azure | 8× AMD Instinct MI300X | 1536 GB | $48.00/hr | ||
| p6-b200.48xlarge |  AWS | 8× B200 | 1432 GB | $113.93/hr | ||
Versions
| Version | Released | Context | Input / 1M | Output / 1M | Status |
|---|---|---|---|---|---|
| Beam 1.0 501B A23B | 1.0M | $0.250 | $1.00 | Current | |
| Beam 1 | — | 1.0M | $0.400 | $1.20 | Available |
| Beam 1.0 | 1.0M | — | — | Available | |
| Beam 1.0 Free | 1.0M | — | — | Available |