# Claude Fable 5 vs Claude Mythos 5

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

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

- Shared sourced benchmarks: 5
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Pick Claude Mythos 5 if you want the stronger benchmark profile. Claude Fable 5 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Claude Mythos 5 leads overall 85 to 80.9.
- The clearest category separation is in multimodal & grounded, where the averages are 62.5 for Claude Fable 5 and 85.1 for Claude Mythos 5.
- The biggest single benchmark swing is Terminal-Bench 2.0 in Agentic, with scores of 84.3% and 88%.

## Model Snapshot

| Property | Claude Fable 5 | Claude Mythos 5 |
|----------|----------|----------|
| Creator | Anthropic | Anthropic |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M+ | 1M+ |
| Overall Score | 80.9 | null |
| Benchmarks Covered | 18 | 15 |
| Pricing (input/output) | $10.00 / $50.00 | $10.00 / $50.00 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- Claude Fable 5 public-lane score: 74.8 (Supported · #3/151)
- Claude Mythos 5 public-lane score: Coming soon

| Benchmark | Claude Fable 5 | Claude Mythos 5 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 34.0% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 84.3% | 88% | Claude Mythos 5 |
| OSWorld-Verified | 85% | 85% | Tie |
| Terminal-Bench 2.1 (Vals) | 80.5% | Coming soon | Coming soon |
| BrowseComp | Coming soon | 88% | Coming soon |
| CyberGym | Coming soon | 83.8% | Coming soon |

### Coding

- Winner: Coming soon
- Claude Fable 5 public-lane score: 76.9 (Supported · #2/183)
- Claude Mythos 5 public-lane score: Coming soon

| Benchmark | Claude Fable 5 | Claude Mythos 5 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 95% | 95.5% | Claude Mythos 5 |
| SWE-bench Pro | 80% | 80.3% | Claude Mythos 5 |
| FrontierSWE v2 | 48.0% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 53.5% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 84.3% | 88.0% | Claude Mythos 5 |
| cursorBench31 | 70.6% | Coming soon | Coming soon |
| cursorBench32 | 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 |

### Multimodal & Grounded

- Winner: Coming soon
- Claude Fable 5 public-lane score: 62.5 (Unranked · 2 rankable rows)
- Claude Mythos 5 public-lane score: 85.1 (Unranked · 3 rankable rows)

| Benchmark | Claude Fable 5 | Claude Mythos 5 | Winner |
|-----------|-----------|-----------|--------|
| Blueprint-Bench 2 | 38.6% | Coming soon | Coming soon |
| OfficeQA Pro | 57.9% | Coming soon | Coming soon |
| SWE-bench Multimodal | Coming soon | 54.9% | Coming soon |
| CharXiv | Coming soon | 93.5% | Coming soon |
| CharXiv w/o tools | Coming soon | 88.9% | Coming soon |

### Reasoning

- Winner: Coming soon
- Claude Fable 5 public-lane score: 76.2 (#11/22)
- Claude Mythos 5 public-lane score: Coming soon

### Knowledge

- Winner: Coming soon
- Claude Fable 5 public-lane score: 83.5 (Supported · #2/181)
- Claude Mythos 5 public-lane score: Coming soon

| Benchmark | Claude Fable 5 | Claude Mythos 5 | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 93.2% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 91.5% | Coming soon | Coming soon |
| GPQA | Coming soon | 94.1% | Coming soon |
| HLE | Coming soon | 64.5% | Coming soon |
| HLE w/o tools | Coming soon | 59% | Coming soon |

### Instruction Following

- Winner: Coming soon
- Claude Fable 5 public-lane score: 78.3 (#54/120)
- Claude Mythos 5 public-lane score: Coming soon

### Multilingual

- Winner: Coming soon
- Claude Fable 5 public-lane score: Coming soon
- Claude Mythos 5 public-lane score: Coming soon

| Benchmark | Claude Fable 5 | Claude Mythos 5 | Winner |
|-----------|-----------|-----------|--------|
| SWE Multilingual | Coming soon | 92.2% | Coming soon |

### Mathematics

- Winner: Coming soon
- Claude Fable 5 public-lane score: Coming soon
- Claude Mythos 5 public-lane score: Coming soon

| Benchmark | Claude Fable 5 | Claude Mythos 5 | Winner |
|-----------|-----------|-----------|--------|
| USAMO 2026 | Coming soon | 97.6% | Coming soon |

## FAQ

### Which is better overall, Claude Fable 5 or Claude Mythos 5?

Claude Mythos 5 is ahead overall on BenchLM right now.

### Where is the biggest gap between Claude Fable 5 and Claude Mythos 5?

The widest category gap is in multimodal & grounded, where the averages are 62.5 for Claude Fable 5 and 85.1 for Claude Mythos 5.

### How many benchmarks does Claude Fable 5 cover on BenchLM?

Claude Fable 5 currently has 18 sourced benchmark scores on BenchLM.

### How many benchmarks does Claude Mythos 5 cover on BenchLM?

Claude Mythos 5 currently has 15 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Fable 5 vs Claude Fable 5.1](/compare/claude-fable-vs-claude-fable-5-1)
- [Claude Mythos 5 vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-claude-mythos-5)
- [Claude Fable 5 vs Claude Mythos 5.1](/compare/claude-fable-vs-claude-mythos-5-1)
- [Claude Mythos 5 vs Claude Mythos 5.1](/compare/claude-mythos-5-vs-claude-mythos-5-1)

## Explore More

- [Claude Fable 5 profile](/models/claude-fable)
- [Claude Mythos 5 profile](/models/claude-mythos-5)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)