# Claude Fable 5.2 vs Gemini 4 Hydrogen

> Side-by-side benchmark comparison for Claude Fable 5.2 and Gemini 4 Hydrogen across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-fable-5-2-vs-gemini-4-hydrogen
- Last updated: November 12, 2026

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

## Quick Verdict

Claude Fable 5.2 leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Claude Fable 5.2 has the higher overall point estimate 91.41 to 0. Conditional score ranges do not establish rank confidence.
- The biggest single benchmark swing is Terminal-Bench-Science 0.1 in Agentic, with scores of 74.6% and 51.4%.
- Gemini 4 Hydrogen is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | Claude Fable 5.2 | Gemini 4 Hydrogen |
|----------|----------|----------|
| Creator | Anthropic | Google |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Overall Score | 91.41 | null |
| Benchmarks Covered | 33 | 5 |
| Pricing (input/output) | $8.00 / $40.00 | $1.50 / $7.50 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Claude Fable 5.2 public-lane score: 90 (Estimated · #1/135)
- Gemini 4 Hydrogen public-lane score: Coming soon

| Benchmark | Claude Fable 5.2 | Gemini 4 Hydrogen | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 4.0 | 67.60% | Coming soon | Coming soon |
| Terminal-Bench-Science 0.1 | 74.6% | 51.4% | Claude Fable 5.2 |
| AutomationBench | 51.4% | Coming soon | Coming soon |
| OSWorld 2.1 Offline | 89.3% | 77.6% | Claude Fable 5.2 |
| WANDR | 82.1% | Coming soon | Coming soon |
| Remote Labor Index | 41.3% | Coming soon | Coming soon |
| RoboDojo Sim | 64.9% | Coming soon | Coming soon |
| DRACO | 87.7% | Coming soon | Coming soon |
| MKA | Coming soon | 53.4% | Coming soon |

### Coding

- Winner: Not comparable
- Claude Fable 5.2 public-lane score: 89.1 (Supported · #1/161)
- Gemini 4 Hydrogen public-lane score: Coming soon

| Benchmark | Claude Fable 5.2 | Gemini 4 Hydrogen | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | 93% | Coming soon | Coming soon |
| SWE Multilingual | 96.6% | Coming soon | Coming soon |
| SWE Multimodal | 74.1% | Coming soon | Coming soon |
| DeepSWE | 74.3% | Coming soon | Coming soon |
| FrontierSWE v2 | 69.9% | Coming soon | Coming soon |
| ProgramBench | 85.6% | Coming soon | Coming soon |
| FrontierCode 2.0 | 49.1% | 38.2% | Claude Fable 5.2 |
| CursorBench 4.0 | 60.0% | Coming soon | Coming soon |
| Bug Hunt Bench | 58.0 fixes | Coming soon | Coming soon |

### Reasoning

- Winner: Not comparable
- Claude Fable 5.2 public-lane score: 90.5 (Supported · #1/160)
- Gemini 4 Hydrogen public-lane score: Coming soon

| Benchmark | Claude Fable 5.2 | Gemini 4 Hydrogen | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-3 | 65.7% | Coming soon | Coming soon |
| ARC-AGI-3 Provider Adapter | 94.90% | Coming soon | Coming soon |
| STEM Professor Bench | 61.8% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Claude Fable 5.2 public-lane score: 89.6 (Estimated · #1/67)
- Gemini 4 Hydrogen public-lane score: Coming soon

| Benchmark | Claude Fable 5.2 | Gemini 4 Hydrogen | Winner |
|-----------|-----------|-----------|--------|
| Chartography (no tools) | 73.4% | 66.6% | Claude Fable 5.2 |
| Chartography (tools) | 91.6% | Coming soon | Coming soon |
| OfficeQA | 83.4% | Coming soon | Coming soon |
| OfficeQA Pro | 72.9% | Coming soon | Coming soon |
| BenchCAD 2.1 | 75.4% | Coming soon | Coming soon |
| BenchCAD 2.1 (tools) | 83.5% | Coming soon | Coming soon |

### Knowledge

- Winner: Not comparable
- Claude Fable 5.2 public-lane score: 98 (Supported · #1/180)
- Gemini 4 Hydrogen public-lane score: Coming soon

| Benchmark | Claude Fable 5.2 | Gemini 4 Hydrogen | Winner |
|-----------|-----------|-----------|--------|
| HLE | 74.2% | Coming soon | Coming soon |
| HLE w/o tools | 73.2% | Coming soon | Coming soon |
| PhysicianBench | 64.4% | Coming soon | Coming soon |

### Multilingual

- Winner: Not comparable
- Claude Fable 5.2 public-lane score: Coming soon
- Gemini 4 Hydrogen public-lane score: Coming soon

| Benchmark | Claude Fable 5.2 | Gemini 4 Hydrogen | Winner |
|-----------|-----------|-----------|--------|
| GMMLU | 96.0% | Coming soon | Coming soon |
| MILU | 94.1% | Coming soon | Coming soon |

### Mathematics

- Winner: Not comparable
- Claude Fable 5.2 public-lane score: 93.8 (Unranked · 2 rankable rows)
- Gemini 4 Hydrogen public-lane score: Coming soon

| Benchmark | Claude Fable 5.2 | Gemini 4 Hydrogen | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 95.088% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 100.000% | Coming soon | Coming soon |

## FAQ

### Which is better overall, Claude Fable 5.2 or Gemini 4 Hydrogen?

Claude Fable 5.2 has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### How many benchmarks does Claude Fable 5.2 cover on BenchLM?

Claude Fable 5.2 currently has 33 sourced benchmark scores on BenchLM.

### How many benchmarks does Gemini 4 Hydrogen cover on BenchLM?

Gemini 4 Hydrogen currently has 5 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Fable 5.2 vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-claude-fable-5-2)
- [Gemini 4 Hydrogen vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-gemini-4-hydrogen)
- [Claude Fable 5.2 vs Claude Fable 5](/compare/claude-fable-vs-claude-fable-5-2)
- [Gemini 4 Hydrogen vs Claude Fable 5](/compare/claude-fable-vs-gemini-4-hydrogen)

## Explore More

- [Claude Fable 5.2 profile](/models/claude-fable-5-2)
- [Gemini 4 Hydrogen profile](/models/gemini-4-hydrogen)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)