# Claude Fable 5 vs LFM3-1.7B

> Side-by-side benchmark comparison for Claude Fable 5 and LFM3-1.7B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-fable-vs-lfm3-1-7b
- Last updated: October 27, 2026

- Shared sourced benchmarks: 3
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: Claude Fable 5 and LFM3-1.7B share only 3 sourced benchmark rows.

## Summary

- Only 3 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- LFM3-1.7B has the lower published output-token price.
- Claude Fable 5 has the larger published context window at 1M+.

## Model Snapshot

| Property | Claude Fable 5 | LFM3-1.7B |
|----------|----------|----------|
| Creator | Anthropic | LiquidAI |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M+ | 256K |
| Independent public score (not head-to-head) | 81.27 | 22.99 |
| Benchmarks Covered | 25 | 24 |
| Pricing (input/output) | $10.00 / $50.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Claude Fable 5 public-lane score: 75.8 (Supported · #7/134)
- LFM3-1.7B public-lane score: 14.4 (Estimated · #123/134)

| Benchmark | Claude Fable 5 | LFM3-1.7B | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 34.0% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 84.3% | 12.9% | Claude Fable 5 |
| OSWorld-Verified | 85% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 80.5% | Coming soon | Coming soon |
| ApprenticeBench | 34% | Coming soon | Coming soon |
| MazeBench | 11% | Coming soon | Coming soon |
| AutomationBench | Coming soon | 41.3% | Coming soon |
| BFCL v4 | Coming soon | 71.4% | Coming soon |
| τ³-bench results | Coming soon | 68.0% | Coming soon |
| WebArena-Verified | Coming soon | 38.4% | Coming soon |
| MCP Atlas | Coming soon | 32.6% | Coming soon |
| ToolSandbox | Coming soon | 80.36% | Coming soon |
| Claw-Eval | Coming soon | 68.6% | Coming soon |
| HLE w/ tools | Coming soon | 13.9% | Coming soon |
| LiveClaw | Coming soon | 45.60% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude Fable 5 public-lane score: 71.8 (Supported · #7/155)
- LFM3-1.7B public-lane score: 13 (Estimated · #142/155)

| Benchmark | Claude Fable 5 | LFM3-1.7B | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 95% | 43.4% | Claude Fable 5 |
| SWE-bench Pro | 80% | Coming soon | Coming soon |
| FrontierSWE v2 | 47.0% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 53.5% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 84.3% | 12.9% | Claude Fable 5 |
| cursorBench31 | 70.6% | Coming soon | Coming soon |
| CursorBench 3.2 | 70.5% | Coming soon | Coming soon |
| VulcanBench v3 | 89.5% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 89.8% | Coming soon | Coming soon |
| SWE-bench (Vals) | 95.0% | Coming soon | Coming soon |
| SciCode | Coming soon | 28.5% | Coming soon |
| SWE Multilingual | Coming soon | 23% | Coming soon |
| LiveCodeBench v6 | Coming soon | 73.5% | Coming soon |
| LiveCodeBench Pro | Coming soon | 31.7% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Claude Fable 5 public-lane score: 84.3 (Unranked · 4 rankable rows)
- LFM3-1.7B public-lane score: 61.3 (Unranked · 1 rankable row)

| Benchmark | Claude Fable 5 | LFM3-1.7B | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | 98.50% | Coming soon | Coming soon |
| ARC-AGI-2 | 89.2% | Coming soon | Coming soon |
| RULER (128K) | Coming soon | 65.56% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude Fable 5 public-lane score: 64.9 (Unranked · 2 rankable rows)
- LFM3-1.7B public-lane score: Coming soon

| Benchmark | Claude Fable 5 | LFM3-1.7B | Winner |
|-----------|-----------|-----------|--------|
| ParseBench | 69.79% | Coming soon | Coming soon |
| Blueprint-Bench 2 | 38.6% | Coming soon | Coming soon |
| OfficeQA Pro | 57.9% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Claude Fable 5 public-lane score: 82.7 (Supported · #5/189)
- LFM3-1.7B public-lane score: 25.5 (Estimated · #175/189)

| Benchmark | Claude Fable 5 | LFM3-1.7B | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 93.2% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 91.5% | Coming soon | Coming soon |
| GPQA | Coming soon | 63.4% | Coming soon |
| GPQA-D | Coming soon | 63.4% | Coming soon |
| HLE | Coming soon | 7.2% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Claude Fable 5 public-lane score: 77.1 (#67/156)
- LFM3-1.7B public-lane score: 71.7 (#76/156)

| Benchmark | Claude Fable 5 | LFM3-1.7B | Winner |
|-----------|-----------|-----------|--------|
| IFEval | Coming soon | 96.7% | Coming soon |
| IFBench | Coming soon | 73.0% | Coming soon |
| Multi-IF | Coming soon | 89.10% | Coming soon |
| IFStruct | Coming soon | 93.72% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Claude Fable 5 public-lane score: 96 (Unranked · 2 rankable rows)
- LFM3-1.7B public-lane score: Coming soon

| Benchmark | Claude Fable 5 | LFM3-1.7B | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 87.018% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 90.200% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between Claude Fable 5 and LFM3-1.7B?

Not yet. The models share only 3 sourced benchmark rows, 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 vs Claude Fable 5.1](/compare/claude-fable-vs-claude-fable-5-1)
- [LFM3-1.7B vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-lfm3-1-7b)
- [Claude Fable 5 vs LFM3-1.7B-Base](/compare/claude-fable-vs-lfm3-1-7b-base)
- [LFM3-1.7B vs LFM3-1.7B-Base](/compare/lfm3-1-7b-vs-lfm3-1-7b-base)

## Explore More

- [Claude Fable 5 profile](/models/claude-fable)
- [LFM3-1.7B profile](/models/lfm3-1-7b)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)