Model specification · Reflection
Beam 1.0 501B A23B
reflection/beam-1.0-501b-a23b
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...
SpecificationsReported values
- Context window
- 1.0M
- Maximum output
- 944K
- Architecture
- text->text
- Tokenizer
- Other
- Knowledge cutoff
- 2026-06-30
- Moderated
- No
- Input modalities
- text
- Output modalities
- text
Full pricingUSD where reported
| Price | Standard |
|---|---|
| Input | $0.300 / M |
| Output | $1.00 / M |
Benchmark indexesReported indexes
- Intelligence
- 17.7
- Coding
- —
- Agentic
- —
- Design Arena Elo
- 1216
Example workload costsStandard pricing only
| Workload | Input / output | Cache share | Estimated cost |
|---|---|---|---|
| Quick check | 10K / 1K × 1 | 0% | $0.00400 |
| Long analysis | 100K / 4K × 1 | 50% | $0.021 |
| Workday | 20K / 2K × 1,000 | 30% | $6.44 |