# Perplexity Decider Flash v1.2 4B vs Beam 1.0 501B-A23B

> Side-by-side benchmark comparison for Perplexity Decider Flash v1.2 4B and Beam 1.0 501B-A23B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/pplx-decider-flash-v1-2-vs-reflection-beam
- Last updated: October 20, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Perplexity Decider Flash v1.2 4B and Beam 1.0 501B-A23B.

## Summary

- Perplexity Decider Flash v1.2 4B and Beam 1.0 501B-A23B do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | Perplexity Decider Flash v1.2 4B | Beam 1.0 501B-A23B |
|----------|----------|----------|
| Creator | Perplexity | Reflection AI |
| Type | Open Weight | Open Weight |
| Reasoning | Unspecified | Reasoning |
| Context | 262K | 1M |
| Independent public score (not head-to-head) | null | 51.5 |
| Benchmarks Covered | 0 | 19 |
| Pricing (input/output) | $0.01 / $0.00 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Perplexity Decider Flash v1.2 4B public-lane score: Coming soon
- Beam 1.0 501B-A23B public-lane score: 50 (Supported · #49/131)

| Benchmark | Perplexity Decider Flash v1.2 4B | Beam 1.0 501B-A23B | Winner |
|-----------|-----------|-----------|--------|
| τ³-bench results | Coming soon | 36.1% | Coming soon |
| HLE w/ tools | Coming soon | 51.1% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 80.1% | Coming soon |
| MCP Atlas | Coming soon | 80.8% | Coming soon |
| BrowseComp | Coming soon | 76.8% | Coming soon |
| DeepSearchQA | Coming soon | 80.5% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Perplexity Decider Flash v1.2 4B public-lane score: Coming soon
- Beam 1.0 501B-A23B public-lane score: Coming soon

| Benchmark | Perplexity Decider Flash v1.2 4B | Beam 1.0 501B-A23B | Winner |
|-----------|-----------|-----------|--------|
| DeepSWE | Coming soon | 43.3% | Coming soon |
| SWE-bench Pro | Coming soon | 66.1% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 80.1% | Coming soon |
| SWE-Atlas Codebase QnA | Coming soon | 31.8% | Coming soon |
| SWE Multilingual | Coming soon | 78.3% | Coming soon |
| SWE-bench Verified | Coming soon | 81.6% | Coming soon |
| SciCode | Coming soon | 49.2% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Perplexity Decider Flash v1.2 4B public-lane score: Coming soon
- Beam 1.0 501B-A23B public-lane score: 78.7 (Unranked · 2 rankable rows)

| Benchmark | Perplexity Decider Flash v1.2 4B | Beam 1.0 501B-A23B | Winner |
|-----------|-----------|-----------|--------|
| CritPt | Coming soon | 16.3% | Coming soon |
| LongBench v2 | Coming soon | 67.5% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Perplexity Decider Flash v1.2 4B public-lane score: Coming soon
- Beam 1.0 501B-A23B public-lane score: 55.5 (Supported · #58/187)

| Benchmark | Perplexity Decider Flash v1.2 4B | Beam 1.0 501B-A23B | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | Coming soon | 90.6% | Coming soon |
| HLE w/o tools | Coming soon | 36% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Perplexity Decider Flash v1.2 4B public-lane score: Coming soon
- Beam 1.0 501B-A23B public-lane score: Coming soon

| Benchmark | Perplexity Decider Flash v1.2 4B | Beam 1.0 501B-A23B | Winner |
|-----------|-----------|-----------|--------|
| IFBench | Coming soon | 79.6% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Perplexity Decider Flash v1.2 4B public-lane score: Coming soon
- Beam 1.0 501B-A23B public-lane score: Coming soon

| Benchmark | Perplexity Decider Flash v1.2 4B | Beam 1.0 501B-A23B | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | Coming soon | 97.7% | Coming soon |

## FAQ

### Can I compare Perplexity Decider Flash v1.2 4B and Beam 1.0 501B-A23B on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

- [Perplexity Decider Flash v1.2 4B vs Beam 1.0 501B-A23B FP8](/compare/pplx-decider-flash-v1-2-vs-reflection-beam-fp8)
- [Beam 1.0 501B-A23B vs Beam 1.0 501B-A23B FP8](/compare/reflection-beam-vs-reflection-beam-fp8)
- [Perplexity Decider Flash v1.2 4B vs Beam 1.0 501B-A23B NVFP4](/compare/pplx-decider-flash-v1-2-vs-reflection-beam-nvfp4)
- [Beam 1.0 501B-A23B vs Beam 1.0 501B-A23B NVFP4](/compare/reflection-beam-vs-reflection-beam-nvfp4)

## Explore More

- [Perplexity Decider Flash v1.2 4B profile](/models/pplx-decider-flash-v1-2)
- [Beam 1.0 501B-A23B profile](/models/reflection-beam)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)