# Claude Fable 5.1 vs Gemini 4 Argon

> Side-by-side benchmark comparison for Claude Fable 5.1 and Gemini 4 Argon across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-fable-5-1-vs-gemini-4-argon
- Last updated: September 30, 2026

- Shared sourced benchmarks: 9
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

Pick Claude Fable 5.1 if you want the stronger benchmark profile. Gemini 4 Argon 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 82.1 to 64.59.
- The clearest category separation is in agentic, where the averages are 79 for Claude Fable 5.1 and 63.7 for Gemini 4 Argon.
- The biggest single benchmark swing is OSWorld 2.0 in Agentic, with scores of 41.7% and 69.2%.
- Gemini 4 Argon 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 | Gemini 4 Argon |
|----------|----------|----------|
| Creator | Anthropic | Google |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | null |
| Overall Score | 82.1 | 64.59 |
| Benchmarks Covered | 30 | 17 |
| Pricing (input/output) | $10.00 / $50.00 | $2.00 / $10.00 |

## Category Breakdown

### Agentic

- Winner: Directional only
- Claude Fable 5.1 public-lane score: 79 (Supported · #2/119)
- Gemini 4 Argon public-lane score: 63.7 (Estimated · #14/119)

| Benchmark | Claude Fable 5.1 | Gemini 4 Argon | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 4.0 | 55.80% | 57.40% | Gemini 4 Argon |
| Terminal-Bench-Science 0.1 | 52.6% | Coming soon | Coming soon |
| OSWorld 2.0 | 41.7% | 69.2% | Gemini 4 Argon |
| AutomationBench | 31.4% | 51.3% | Gemini 4 Argon |
| 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% | 68.0% | Gemini 4 Argon |
| Finance Agent v2 | Coming soon | 65.4% | Coming soon |
| Agents' Last Exam | Coming soon | 39.5% | Coming soon |
| Terminal-Bench-Science 0.1 (6x verifier timeout) | Coming soon | 57.6% | Coming soon |

### Coding

- Winner: Claude Fable 5.1
- Claude Fable 5.1 public-lane score: 80 (Supported · #3/144)
- Gemini 4 Argon public-lane score: 68.4 (Supported · #8/144)

| Benchmark | Claude Fable 5.1 | Gemini 4 Argon | 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% | 77.9% | Gemini 4 Argon |
| FrontierSWE v2 | 56.3% | 55.1% | Claude Fable 5.1 |
| ProgramBench | 87.6% | Coming soon | Coming soon |
| cursorBench32 | 73.4% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 90.5% | Coming soon | Coming soon |
| cursorBench40 | 51.8% | Coming soon | Coming soon |
| PostTrainBench v1.1 | 40.2% | 45.3% | Gemini 4 Argon |
| Vibe Code Bench | Coming soon | 91.90% | Coming soon |

### Reasoning

- Winner: Not comparable
- Claude Fable 5.1 public-lane score: 81.4 (#3/27)
- Gemini 4 Argon public-lane score: 77.1 (Unranked · 3 rankable rows)

| Benchmark | Claude Fable 5.1 | Gemini 4 Argon | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | 97.50% | Coming soon | Coming soon |
| ARC-AGI-2 | 90% | Coming soon | Coming soon |
| GraphWalks BFS 256K–1M | 65.0% | 84.2% | Gemini 4 Argon |
| Graphwalks BFS 128K | Coming soon | 99.7% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Claude Fable 5.1 public-lane score: Coming soon
- Gemini 4 Argon public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | Gemini 4 Argon | Winner |
|-----------|-----------|-----------|--------|
| Chartography (no tools) | Coming soon | 71.6% | Coming soon |
| LVBench | Coming soon | 91.7% | Coming soon |

### Knowledge

- Winner: Claude Fable 5.1
- Claude Fable 5.1 public-lane score: 85.7 (Supported · #3/170)
- Gemini 4 Argon public-lane score: 72.9 (Supported · #11/170)

| Benchmark | Claude Fable 5.1 | Gemini 4 Argon | 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 |
| LABBench2 | Coming soon | 88.8% | Coming soon |

### Instruction Following

- Winner: Not comparable
- Claude Fable 5.1 public-lane score: Coming soon
- Gemini 4 Argon public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | Gemini 4 Argon | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | 1.0% | 0.7% | Gemini 4 Argon |

## FAQ

### Which is better overall, Claude Fable 5.1 or Gemini 4 Argon?

Claude Fable 5.1 is ahead overall on BenchLM right now.

### Where is the biggest gap between Claude Fable 5.1 and Gemini 4 Argon?

The widest category gap is in agentic, where the averages are 79 for Claude Fable 5.1 and 63.7 for Gemini 4 Argon.

### 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 Gemini 4 Argon cover on BenchLM?

Gemini 4 Argon currently has 17 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Fable 5.1 vs Claude Fable 5](/compare/claude-fable-vs-claude-fable-5-1)
- [Gemini 4 Argon vs Claude Fable 5](/compare/claude-fable-vs-gemini-4-argon)
- [Claude Fable 5.1 vs GPT-6 Astra](/compare/claude-fable-5-1-vs-gpt-6-astra)
- [Gemini 4 Argon vs GPT-6 Astra](/compare/gemini-4-argon-vs-gpt-6-astra)

## Explore More

- [Claude Fable 5.1 profile](/models/claude-fable-5-1)
- [Gemini 4 Argon profile](/models/gemini-4-argon)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)