Reflection Beam 1.0 501B A23B vs Z.ai GLM 4.5 Air
Side by side from live data: prices, limits, who serves each model and how reliably, and how they do on our chess arena.
In short
- GLM 4.5 Air is 1.4× cheaper at a typical mix of 3 input tokens per output token.
- Beam 1.0 501B A23B accepts longer prompts: 1M vs 131K tokens.
- Beam 1.0 501B A23B is the newer model (released 2026-10-16).
| Beam 1.0 501B A23B | GLM 4.5 Air | |
|---|---|---|
| Vendor | Reflection | Z.ai |
| Released | 2026-10-16 | 2025-07-25 |
| Input / 1M | $0.25 | $0.13 |
| Output / 1M | $1.00 | $0.85 |
| Cached input / 1M | $0.05 | $0.025 |
| Blended / 1M (3:1) | $0.438 | $0.31 |
| Context | 1M | 131K |
| Max output | 131K | 98K |
| Accepts | text | text |
| Reasoning | Yes | Yes |
| Providers on OpenRouter | 5 | 3 |
| Cheapest provider, output | $1.00 | $0.85 |
| Best provider uptime, 24 h | 100% | 100% |
| Chess arena rating | not playing | not playing |
| Vendor API status | — | — |
Cost calculator
Beam 1.0 501B A23B
$30.00 per month$1.00 per day
GLM 4.5 Air
$20.55 per month$0.69 per day
GLM 4.5 Air saves $9.45 a month on this workload.
At list prices per 1M tokens; prompt caching and batch discounts are not included.
Compare Beam 1.0 501B A23B with
Compare GLM 4.5 Air with