# Claude Fable 5.1 vs Granite 4.2 30B

> Side-by-side benchmark comparison for Claude Fable 5.1 and Granite 4.2 30B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-fable-5-1-vs-granite-4-2-30b
- Last updated: September 10, 2026

- Shared sourced benchmarks: 2
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: Claude Fable 5.1 and Granite 4.2 30B share only 2 sourced benchmark rows.

## Summary

- Only 2 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Granite 4.2 30B 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 | Granite 4.2 30B |
|----------|----------|----------|
| Creator | Anthropic | IBM |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 128K |
| Independent public score (not head-to-head) | 84.61 | null |
| Benchmarks Covered | 24 | 14 |
| 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)
- Granite 4.2 30B public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | Granite 4.2 30B | 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 | 29.2% | Coming soon |
| τ³-bench results | Coming soon | 62.0% | Coming soon |
| BFCL v4 | Coming soon | 61.4% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude Fable 5.1 public-lane score: 84.3 (Supported · #1/151)
- Granite 4.2 30B public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | Granite 4.2 30B | Winner |
|-----------|-----------|-----------|--------|
| Bug Hunt Bench | 43 fixes | Coming soon | Coming soon |
| SWE-bench Pro | 81.2% | 33.3% | Claude Fable 5.1 |
| SWE Multilingual | 89.1% | 41.9% | Claude Fable 5.1 |
| 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 |
| SWE-bench Verified | Coming soon | 57% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 29.2% | Coming soon |
| LiveCodeBench v6 | Coming soon | 75.8% | Coming soon |
| SciCode | Coming soon | 38.8% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Claude Fable 5.1 public-lane score: 79.4 (#2/20)
- Granite 4.2 30B public-lane score: 54.7 (Unranked · 2 rankable rows)

| Benchmark | Claude Fable 5.1 | Granite 4.2 30B | 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)
- Granite 4.2 30B public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | Granite 4.2 30B | Winner |
|-----------|-----------|-----------|--------|
| HLE | 65% | Coming soon | Coming soon |
| 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 |
| GPQA | Coming soon | 66.4% | Coming soon |
| MMLU-Pro | Coming soon | 77.6% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Claude Fable 5.1 public-lane score: Coming soon
- Granite 4.2 30B public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | Granite 4.2 30B | Winner |
|-----------|-----------|-----------|--------|
| IFBench | Coming soon | 77.2% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Claude Fable 5.1 public-lane score: Coming soon
- Granite 4.2 30B public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | Granite 4.2 30B | Winner |
|-----------|-----------|-----------|--------|
| AIME 2025 | Coming soon | 89.2% | Coming soon |
| HMMT Feb 2025 | Coming soon | 89.2% | Coming soon |

## FAQ

### Is there enough evidence to pick between Claude Fable 5.1 and Granite 4.2 30B?

Not yet. The models share only 2 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 5.1 vs Claude Fable 5](/compare/claude-fable-vs-claude-fable-5-1)
- [Granite 4.2 30B vs Claude Fable 5](/compare/claude-fable-vs-granite-4-2-30b)
- [Claude Fable 5.1 vs Granite 4.2 8B](/compare/claude-fable-5-1-vs-granite-4-2-8b)
- [Granite 4.2 30B vs Granite 4.2 8B](/compare/granite-4-2-30b-vs-granite-4-2-8b)

## Explore More

- [Claude Fable 5.1 profile](/models/claude-fable-5-1)
- [Granite 4.2 30B profile](/models/granite-4-2-30b)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)