Reka Flash 3 Open vs PEPerceptron Mk1.5 Paid
Reka Flash 3 vs Perceptron Mk1.5 compared — price per token, context window, multimodality, openness and which to choose. Can the open-source model replace the paid one? Full 2026 breakdown.
Perceptron Mk1.5 — full profile ›
Prices & specs refreshed from live data · olud.ai
Open-model prices = cheapest provider via OpenRouter; official maker rates may be higher.
$0.2 /M outputNo per-token fees if you self-host
$1.5 /M outputManaged API (no infra to run)
Reka Flash 3 vs Perceptron Mk1.5 specs
| Spec | Reka Flash 3 | Perceptron Mk1.5 | Winner |
|---|---|---|---|
| Maker | Rekaai | Perceptron | – |
| Type | Open-weight | Proprietary | |
| Context window | 66K tokens | 37K tokens | |
| Input price | $0.1/M · free self-host | $0.15/M | |
| Output price | $0.2/M · free self-host | $1.5/M | |
| Vision / multimodal | No | Yes | PEPerceptron Mk1.5 |
| Tool / function calling | No | Yes | PEPerceptron Mk1.5 |
| Self-hostable | Yes | No (API only) | |
| License | Open weights | Proprietary |
Price gap & when to choose each
Reka Flash 3 is ~7.5× cheaper than Perceptron Mk1.5 on output tokens ($0.2 vs $1.5 per M tokens).
- You want to self-host or run on your cloud
- You need the longer 66K 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 | Reka Flash 3 | Perceptron Mk1.5 |
|---|---|---|
| Open weights (downloadable) | ✓ | ✗ |
| Self-hostable | ✓ | ✗ |
| Runs fully offline | ✓ | ✗ |
| Vision / multimodal | ✗ | ✓ |
| Tool / function calling | ✗ | ✓ |
| 1M+ context window | ✗ | ✗ |
Benchmarks: Reka Flash 3 vs Perceptron Mk1.5
Independent benchmark scores measured by Artificial Analysis. Higher is better (except latency).
Benchmark data by Artificial Analysis.
How Reka Flash 3 and Perceptron Mk1.5 score
| Criterion | Reka Flash 3 | Perceptron Mk1.5 |
|---|---|---|
| Cost-efficiency | 5.0 | 4.5 |
| Context window | 3.0 | 2.5 |
| Openness | 5.0 | 1.5 |
| Self-hosting | 5.0 | 1.0 |
| Multimodality | 2.0 | 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
Reka Flash 3 Open
Reka Flash 3 is a general-purpose, instruction-tuned large language model with 21 billion parameters, developed by Reka. It excels at general chat, coding tasks, instruction-following, and function calling. Featuring a...
Perceptron Mk1.5 Paid
Perceptron Mk1.5 is Perceptron's embodied reasoning model for physical agents. It accepts text, image, video, and audio input, and answers with text plus optional structured annotations: points, boxes, polygons, tracks,...
Other models in these families
These variants are tracked but not compared here — one page per family keeps the comparison readable.
Frequently asked questions
Is Reka Flash 3 as good as Perceptron Mk1.5?
Reka Flash 3 is open-weight and competitive on many tasks, but Perceptron Mk1.5 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 Reka Flash 3 locally?
Yes. Reka Flash 3 has open weights, so you can self-host it on your own GPUs or run it via a low-cost API. Perceptron Mk1.5 is API-only and cannot be self-hosted.
How much cheaper is Reka Flash 3?
Reka Flash 3 costs $0.2/M output vs $1.5/M for Perceptron Mk1.5 — roughly 8x cheaper via API, and free if you self-host.
Reka Flash 3 vs Perceptron Mk1.5 — which should I pick in 2026?
Choose Reka Flash 3 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 Perceptron Mk1.5 if you want frontier capability through a managed API with zero infrastructure to run.
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