# Claude Fable 5.1 vs Beam

> Side-by-side benchmark comparison for Claude Fable 5.1 and Beam across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-fable-5-1-vs-reflection-beam
- Last updated: October 5, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Pick Claude Fable 5.1 if you want the stronger benchmark profile. Beam only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Claude Fable 5.1 leads overall 81.74 to 0.
- The biggest single benchmark swing is HLE w/o tools in Knowledge, with scores of 60.9% and 36.2%.
- Beam is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Claude Fable 5.1 also has the larger context window at 1M.

## Model Snapshot

| Property | Claude Fable 5.1 | Beam |
|----------|----------|----------|
| Creator | Anthropic | Reflection AI |
| Type | Proprietary | Pending |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | null |
| Overall Score | 81.74 | null |
| Benchmarks Covered | 30 | 16 |
| Pricing (input/output) | $10.00 / $50.00 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Claude Fable 5.1 public-lane score: 79 (Supported · #2/119)
- Beam public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | Beam | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 4.0 | 55.80% | Coming soon | Coming soon |
| Terminal-Bench-Science 0.1 | 52.6% | Coming soon | Coming soon |
| OSWorld 2.0 | 41.7% | Coming soon | Coming soon |
| AutomationBench | 31.4% | Coming soon | Coming soon |
| Toolathlon-Verified | 77.8% | Coming soon | Coming soon |
| Toolathlon Verified Pass@3 | 81.5% | Coming soon | Coming soon |
| Toolathlon Verified Pass³ | 73.1% | Coming soon | Coming soon |
| Toolathlon Verified avg. turns | 23.7 turns | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 85.0% | Coming soon | Coming soon |
| ApprenticeBench | 72% | Coming soon | Coming soon |
| CWE-bench v1 | 58.0% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 80.1% | Coming soon |
| MCP Atlas | Coming soon | 78.7% | Coming soon |
| BrowseComp | Coming soon | 77.4% | Coming soon |
| DeepSearchQA | Coming soon | 80.1% | Coming soon |

### Coding

- Winner: Not comparable
- Claude Fable 5.1 public-lane score: 77.8 (Supported · #3/144)
- Beam public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | Beam | Winner |
|-----------|-----------|-----------|--------|
| Bug Hunt Bench | 43 fixes | Coming soon | Coming soon |
| SWE-bench Pro | 81.2% | 65.5% | Claude Fable 5.1 |
| SWE Multilingual | 89.1% | 78% | Claude Fable 5.1 |
| SWE Multimodal | 54.7% | Coming soon | Coming soon |
| DeepSWE | 67.4% | 44.4% | Claude Fable 5.1 |
| FrontierSWE v2 | 56.3% | Coming soon | Coming soon |
| ProgramBench | 87.6% | Coming soon | Coming soon |
| CursorBench 3.2 | 73.4% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 90.5% | Coming soon | Coming soon |
| CursorBench 4.0 | 51.8% | Coming soon | Coming soon |
| PostTrainBench v1.1 | 40.2% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 80.1% | Coming soon |
| SWE-Atlas Codebase QnA | Coming soon | 34.6% | Coming soon |
| SWE-bench Verified | Coming soon | 80.9% | Coming soon |
| SciCode | Coming soon | 49.7% | Coming soon |

### Reasoning

- Winner: Not comparable
- Claude Fable 5.1 public-lane score: 81.4 (#4/27)
- Beam public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | Beam | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | 97.50% | Coming soon | Coming soon |
| ARC-AGI-2 | 90% | Coming soon | Coming soon |
| GraphWalks BFS 256K–1M | 65.0% | Coming soon | Coming soon |
| LongBench v2 | Coming soon | 65.5% | Coming soon |

### Knowledge

- Winner: Not comparable
- Claude Fable 5.1 public-lane score: 84.9 (Supported · #2/171)
- Beam public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | Beam | Winner |
|-----------|-----------|-----------|--------|
| HLE | 65% | Coming soon | Coming soon |
| HLE w/o tools | 60.9% | 36.2% | Claude Fable 5.1 |
| GPQA Diamond (Vals) | 93.4% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 92.4% | Coming soon | Coming soon |
| GPQA-D | Coming soon | 90.5% | Coming soon |

### Instruction Following

- Winner: Not comparable
- Claude Fable 5.1 public-lane score: Coming soon
- Beam public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | Beam | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | 1.0% | Coming soon | Coming soon |
| IFBench | Coming soon | 79.7% | Coming soon |

### Mathematics

- Winner: Not comparable
- Claude Fable 5.1 public-lane score: Coming soon
- Beam public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | Beam | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | Coming soon | 97.8% | Coming soon |

## FAQ

### Which is better overall, Claude Fable 5.1 or Beam?

Claude Fable 5.1 is ahead overall on BenchLM right now.

### How many benchmarks does Claude Fable 5.1 cover on BenchLM?

Claude Fable 5.1 currently has 30 sourced benchmark scores on BenchLM.

### How many benchmarks does Beam cover on BenchLM?

Beam currently has 16 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Fable 5.1 vs Claude Fable 5](/compare/claude-fable-vs-claude-fable-5-1)
- [Beam vs Claude Fable 5](/compare/claude-fable-vs-reflection-beam)
- [Claude Fable 5.1 vs Claude Opus 5.5](/compare/claude-fable-5-1-vs-claude-opus-5-5)
- [Beam vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-reflection-beam)

## Explore More

- [Claude Fable 5.1 profile](/models/claude-fable-5-1)
- [Beam profile](/models/reflection-beam)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)