DeepSeek V3.1 Terminus vs Reflection Beam 1.0 501B A23B
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
- Both cost about the same at a typical 3:1 input/output mix.
- Beam 1.0 501B A23B accepts longer prompts: 1M vs 164K tokens.
- Beam 1.0 501B A23B is the newer model (released 2026-10-16).
| DeepSeek V3.1 Terminus | Beam 1.0 501B A23B | |
|---|---|---|
| Vendor | DeepSeek | Reflection |
| Released | 2025-09-22 | 2026-10-16 |
| Input / 1M | $0.27 | $0.25 |
| Output / 1M | $1.00 | $1.00 |
| Cached input / 1M | — | $0.05 |
| Blended / 1M (3:1) | $0.453 | $0.438 |
| Context | 164K | 1M |
| Max output | 147K | 131K |
| Accepts | text | text |
| Reasoning | Yes | Yes |
| Providers on OpenRouter | 2 | 5 |
| Cheapest provider, output | $1.00 | $1.00 |
| Best provider uptime, 24 h | 99.71% | 100% |
| Chess arena rating | not playing | not playing |
| Vendor API status | Operational | — |
Cost calculator
DeepSeek V3.1 Terminus
$31.20 per month$1.04 per day
Beam 1.0 501B A23B
$30.00 per month$1.00 per day
Beam 1.0 501B A23B saves $1.20 a month on this workload.
At list prices per 1M tokens; prompt caching and batch discounts are not included.
Compare DeepSeek V3.1 Terminus with
Compare Beam 1.0 501B A23B with