# Claude Fable 5.1 vs K-EXAONE 2.0

> Side-by-side benchmark comparison for Claude Fable 5.1 and K-EXAONE 2.0 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-fable-5-1-vs-k-exaone-2-0
- Last updated: September 10, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: Claude Fable 5.1 and K-EXAONE 2.0 share only 1 sourced benchmark row.

## Summary

- Only 1 shared sourced benchmark row is available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- K-EXAONE 2.0 has the lower published output-token price.
- Claude Fable 5.1 has the larger published context window at 1M.

## Model Snapshot

| Property | Claude Fable 5.1 | K-EXAONE 2.0 |
|----------|----------|----------|
| Creator | Anthropic | LG AI Research |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 262K |
| Independent public score (not head-to-head) | 84.61 | null |
| Benchmarks Covered | 24 | 15 |
| Pricing (input/output) | $10.00 / $50.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Claude Fable 5.1 public-lane score: 80.2 (Supported · #1/152)
- K-EXAONE 2.0 public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | K-EXAONE 2.0 | 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 |
| Terminal-Bench 2.1 | Coming soon | 43.8% | Coming soon |
| Claw-Eval | Coming soon | 77.7% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude Fable 5.1 public-lane score: 84.3 (Supported · #1/151)
- K-EXAONE 2.0 public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | K-EXAONE 2.0 | Winner |
|-----------|-----------|-----------|--------|
| Bug Hunt Bench | 43 fixes | Coming soon | Coming soon |
| SWE-bench Pro | 81.2% | Coming soon | Coming soon |
| SWE Multilingual | 89.1% | Coming soon | Coming soon |
| SWE Multimodal | 54.7% | Coming soon | Coming soon |
| DeepSWE | 67.4% | Coming soon | Coming soon |
| FrontierSWE v2 | 56.3% | Coming soon | Coming soon |
| ProgramBench | 87.6% | Coming soon | Coming soon |
| cursorBench32 | 73.4% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 90.5% | Coming soon | Coming soon |
| SciCode | Coming soon | 37.4% | Coming soon |
| SWE-bench Verified | Coming soon | 68.2% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 43.8% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Claude Fable 5.1 public-lane score: 79.4 (#2/20)
- K-EXAONE 2.0 public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | K-EXAONE 2.0 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | 97.50% | Coming soon | Coming soon |
| ARC-AGI-2 | 90% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Claude Fable 5.1 public-lane score: 86.7 (Supported · #1/183)
- K-EXAONE 2.0 public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | K-EXAONE 2.0 | Winner |
|-----------|-----------|-----------|--------|
| HLE | 65% | 18.3% | Claude Fable 5.1 |
| HLE w/o tools | 60.9% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 93.4% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 92.4% | Coming soon | Coming soon |
| MMLU-Pro | Coming soon | 83.5% | Coming soon |
| GPQA-D | Coming soon | 82.2% | Coming soon |
| MMMLU | Coming soon | 86.6% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Claude Fable 5.1 public-lane score: Coming soon
- K-EXAONE 2.0 public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | K-EXAONE 2.0 | Winner |
|-----------|-----------|-----------|--------|
| IFEval | Coming soon | 92.4% | Coming soon |
| IFBench | Coming soon | 72.6% | Coming soon |

### Multilingual

- Winner: Insufficient shared evidence
- Claude Fable 5.1 public-lane score: Coming soon
- K-EXAONE 2.0 public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | K-EXAONE 2.0 | Winner |
|-----------|-----------|-----------|--------|
| PolyMath | Coming soon | 71.3% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Claude Fable 5.1 public-lane score: Coming soon
- K-EXAONE 2.0 public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | K-EXAONE 2.0 | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | Coming soon | 92.3% | Coming soon |
| HMMT Feb 2026 | Coming soon | 78.4% | Coming soon |
| IMOAnswerBench | Coming soon | 78.6% | Coming soon |

## FAQ

### Is there enough evidence to pick between Claude Fable 5.1 and K-EXAONE 2.0?

Not yet. The models share only 1 sourced benchmark row, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [Claude Fable 5.1 vs Claude Fable 5](/compare/claude-fable-vs-claude-fable-5-1)
- [K-EXAONE 2.0 vs Claude Fable 5](/compare/claude-fable-vs-k-exaone-2-0)
- [Claude Fable 5.1 vs GPT-6 Astra](/compare/claude-fable-5-1-vs-gpt-6-astra)
- [K-EXAONE 2.0 vs GPT-6 Astra](/compare/gpt-6-astra-vs-k-exaone-2-0)

## Explore More

- [Claude Fable 5.1 profile](/models/claude-fable-5-1)
- [K-EXAONE 2.0 profile](/models/k-exaone-2-0)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)