# A.X K2 vs Beam 1.0 501B-A23B FP8

> Side-by-side benchmark comparison for A.X K2 and Beam 1.0 501B-A23B FP8 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/a-x-k2-vs-reflection-beam-fp8
- Last updated: October 16, 2026

- Shared sourced benchmarks: 6
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Pick Beam 1.0 501B-A23B FP8 if you want the stronger benchmark profile. A.X K2 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Beam 1.0 501B-A23B FP8 leads overall 71 to 51.
- The biggest single benchmark swing is Terminal-Bench 2.1 in Agentic, with scores of 36.0% and 78.9%.
- Beam 1.0 501B-A23B FP8 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Beam 1.0 501B-A23B FP8 also has the larger context window at 1M.

## Model Snapshot

| Property | A.X K2 | Beam 1.0 501B-A23B FP8 |
|----------|----------|----------|
| Creator | SK Telecom | Reflection AI |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 262K | 1M |
| Overall Score | null | null |
| Benchmarks Covered | 10 | 19 |
| Pricing (input/output) | $0.00 / $0.00 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Not comparable
- A.X K2 public-lane score: Coming soon
- Beam 1.0 501B-A23B FP8 public-lane score: Coming soon

| Benchmark | A.X K2 | Beam 1.0 501B-A23B FP8 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 36.0% | 78.9% | Beam 1.0 501B-A23B FP8 |
| τ³-bench results | Coming soon | 36.8% | Coming soon |
| HLE w/ tools | Coming soon | 51.1% | Coming soon |
| MCP Atlas | Coming soon | 81.5% | Coming soon |
| BrowseComp | Coming soon | 76.7% | Coming soon |
| DeepSearchQA | Coming soon | 79.6% | Coming soon |

### Coding

- Winner: Not comparable
- A.X K2 public-lane score: Coming soon
- Beam 1.0 501B-A23B FP8 public-lane score: Coming soon

| Benchmark | A.X K2 | Beam 1.0 501B-A23B FP8 | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench v6 | 84.0% | Coming soon | Coming soon |
| SciCode | 41% | 48.3% | Beam 1.0 501B-A23B FP8 |
| Terminal-Bench 2.1 | 36.0% | 78.9% | Beam 1.0 501B-A23B FP8 |
| DeepSWE | Coming soon | 43.0% | Coming soon |
| SWE-bench Pro | Coming soon | 65.9% | Coming soon |
| SWE-Atlas Codebase QnA | Coming soon | 32.2% | Coming soon |
| SWE Multilingual | Coming soon | 78.1% | Coming soon |
| SWE-bench Verified | Coming soon | 80.2% | Coming soon |

### Reasoning

- Winner: Not comparable
- A.X K2 public-lane score: Coming soon
- Beam 1.0 501B-A23B FP8 public-lane score: 85.8 (Unranked · 3 rankable rows)

| Benchmark | A.X K2 | Beam 1.0 501B-A23B FP8 | Winner |
|-----------|-----------|-----------|--------|
| CritPt | Coming soon | 17.4% | Coming soon |
| LongBench v2 | Coming soon | 67.6% | Coming soon |

### Knowledge

- Winner: Not comparable
- A.X K2 public-lane score: Coming soon
- Beam 1.0 501B-A23B FP8 public-lane score: Coming soon

| Benchmark | A.X K2 | Beam 1.0 501B-A23B FP8 | Winner |
|-----------|-----------|-----------|--------|
| HLE | 27.8% | Coming soon | Coming soon |
| GPQA-D | 85.6% | 90.3% | Beam 1.0 501B-A23B FP8 |
| HLE w/o tools | Coming soon | 36% | Coming soon |

### Instruction Following

- Winner: Not comparable
- A.X K2 public-lane score: Coming soon
- Beam 1.0 501B-A23B FP8 public-lane score: 89.8 (#28/148)

| Benchmark | A.X K2 | Beam 1.0 501B-A23B FP8 | Winner |
|-----------|-----------|-----------|--------|
| IFBench | 75.9% | 80.7% | Beam 1.0 501B-A23B FP8 |

### Mathematics

- Winner: Not comparable
- A.X K2 public-lane score: Coming soon
- Beam 1.0 501B-A23B FP8 public-lane score: 87.9 (Unranked · 1 rankable row)

| Benchmark | A.X K2 | Beam 1.0 501B-A23B FP8 | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | 97.1% | 98.0% | Beam 1.0 501B-A23B FP8 |
| Apex | 45.8% | Coming soon | Coming soon |
| Apex Shortlist | 88.6% | Coming soon | Coming soon |

## FAQ

### Which is better overall, A.X K2 or Beam 1.0 501B-A23B FP8?

Beam 1.0 501B-A23B FP8 is ahead overall on BenchLM right now.

### How many benchmarks does A.X K2 cover on BenchLM?

A.X K2 currently has 10 sourced benchmark scores on BenchLM.

### How many benchmarks does Beam 1.0 501B-A23B FP8 cover on BenchLM?

Beam 1.0 501B-A23B FP8 currently has 19 sourced benchmark scores on BenchLM.

## Related Comparisons

- [A.X K2 vs A.X series](/compare/a-x-k2-vs-skt-ax)
- [Beam 1.0 501B-A23B FP8 vs A.X series](/compare/reflection-beam-fp8-vs-skt-ax)
- [A.X K2 vs Beam 1.0 501B-A23B](/compare/a-x-k2-vs-reflection-beam)
- [Beam 1.0 501B-A23B FP8 vs Beam 1.0 501B-A23B](/compare/reflection-beam-vs-reflection-beam-fp8)

## Explore More

- [A.X K2 profile](/models/a-x-k2)
- [Beam 1.0 501B-A23B FP8 profile](/models/reflection-beam-fp8)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)