REBeam 1.0 501B A23B Open vs 
Mistral Medium 3 Paid
Beam 1.0 501B A23B vs Mistral Medium 3 compared — price per token, context window, multimodality, openness and which to choose. Can the open-source model replace the paid one? Full 2026 breakdown.
Mistral Medium 3 — full profile ›
Prices & specs refreshed from live data · olud.ai
Open-model prices = cheapest provider via OpenRouter; official maker rates may be higher.
$1 /M outputNo per-token fees if you self-host
$2 /M outputManaged API (no infra to run)
Beam 1.0 501B A23B vs Mistral Medium 3 specs
| Spec | Beam 1.0 501B A23B | Mistral Medium 3 | Winner |
|---|---|---|---|
| Maker | Reflection | Mistral AI | – |
| Type | Open-weight | Proprietary | REBeam 1.0 501B A23B |
| Context window | 1M tokens | 131K tokens | REBeam 1.0 501B A23B |
| Input price | $0.25/M · free self-host | $0.4/M | REBeam 1.0 501B A23B |
| Output price | $1/M · free self-host | $2/M | REBeam 1.0 501B A23B |
| Vision / multimodal | No | Yes | |
| Tool / function calling | Yes | Yes | = Tie |
| Self-hostable | Yes | No (API only) | REBeam 1.0 501B A23B |
| License | Open weights | Proprietary | REBeam 1.0 501B A23B |
Price gap & when to choose each
Beam 1.0 501B A23B is ~2.0× cheaper than Mistral Medium 3 on output tokens ($1 vs $2 per M tokens).
- You want to self-host or run on your cloud
- You need the longer 1M context window
- You prioritize data privacy & control
- You want the lowest operating costs
- You are building open or reproducible AI
- You want frontier performance through a managed API
- You value reliability & ecosystem
- You don't want to manage infrastructure
Feature comparison
| Capability | Beam 1.0 501B A23B | Mistral Medium 3 |
|---|---|---|
| Open weights (downloadable) | ✓ | ✗ |
| Self-hostable | ✓ | ✗ |
| Runs fully offline | ✓ | ✗ |
| Vision / multimodal | ✗ | ✓ |
| Tool / function calling | ✓ | ✓ |
| 1M+ context window | ✓ | ✗ |
Benchmarks: Beam 1.0 501B A23B vs Mistral Medium 3
Independent benchmark scores measured by Artificial Analysis. Higher is better (except latency).
Benchmark data by Artificial Analysis.
How Beam 1.0 501B A23B and Mistral Medium 3 score
| Criterion | Beam 1.0 501B A23B | Mistral Medium 3 |
|---|---|---|
| Cost-efficiency | 4.5 | 4.5 |
| Context window | 5.0 | 3.5 |
| Openness | 5.0 | 1.5 |
| Self-hosting | 5.0 | 1.0 |
| Multimodality | 3.5 | 5.0 |
Scores come from live data — output price (cost), context length, open vs closed weights (openness & self-hosting) and vision/tool support (multimodality). Raw task quality isn't scored here; it depends on your benchmark — see the verdict.
What each model is
Beam 1.0 501B A23B Open
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...
Mistral Medium 3 Paid
Mistral Medium 3 is a high-performance enterprise-grade language model designed to deliver frontier-level capabilities at significantly reduced operational cost. It balances state-of-the-art reasoning and multimodal performance with 8× lowe
Frequently asked questions
Is Beam 1.0 501B A23B as good as Mistral Medium 3?
Beam 1.0 501B A23B is open-weight and competitive on many tasks, but Mistral Medium 3 may still lead on the hardest reasoning and agentic work. The gap keeps narrowing — benchmark both on your actual use case before deciding.
Can I run Beam 1.0 501B A23B locally?
Yes. Beam 1.0 501B A23B has open weights, so you can self-host it on your own GPUs or run it via a low-cost API. Mistral Medium 3 is API-only and cannot be self-hosted.
How much cheaper is Beam 1.0 501B A23B?
Beam 1.0 501B A23B costs $1/M output vs $2/M for Mistral Medium 3 — roughly 2x cheaper via API, and free if you self-host.
Beam 1.0 501B A23B vs Mistral Medium 3 — which should I pick in 2026?
Choose Beam 1.0 501B A23B if you want to self-host, keep your data private and skip per-token fees — it's open-weight and runs on your own hardware. Choose Mistral Medium 3 if you want frontier capability through a managed API with zero infrastructure to run.
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