# Claude Fable 5 vs Claude Opus 5

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

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

- Shared sourced benchmarks: 13
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

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

## Summary

- Claude Fable 5 leads overall 80.9 to 80.66.
- The clearest category separation is in multimodal & grounded, where the averages are 62.5 for Claude Fable 5 and 88.7 for Claude Opus 5.
- The biggest single benchmark swing is OfficeQA Pro in Multimodal & Grounded, with scores of 57.9% and 66.9%.
- Claude Opus 5 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Claude Fable 5 also has the larger context window at 1M+.

## Model Snapshot

| Property | Claude Fable 5 | Claude Opus 5 |
|----------|----------|----------|
| Creator | Anthropic | Anthropic |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M+ | null |
| Overall Score | 80.9 | 80.66 |
| Benchmarks Covered | 18 | 73 |
| Pricing (input/output) | $10.00 / $50.00 | $5.00 / $25.00 |

## Category Breakdown

### Agentic

- Winner: Claude Opus 5
- Claude Fable 5 public-lane score: 74.8 (Supported · #3/151)
- Claude Opus 5 public-lane score: 77.4 (Supported · #2/151)

| Benchmark | Claude Fable 5 | Claude Opus 5 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 34.0% | 42.7% | Claude Opus 5 |
| Terminal-Bench 2.0 | 84.3% | Coming soon | Coming soon |
| OSWorld-Verified | 85% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 80.5% | 84.6% | Claude Opus 5 |
| BrowseComp | Coming soon | 90.8% | Coming soon |
| HLE w/ tools | Coming soon | 64.7% | Coming soon |
| DeepSearchQA | Coming soon | 95.0% | Coming soon |
| DRACO | Coming soon | 88.6% | Coming soon |
| BrowseComp (10-agent, prerelease) | Coming soon | 93.6% | Coming soon |
| OSWorld 2.0 | Coming soon | 70.6% | Coming soon |
| MCP Atlas | Coming soon | 85.8% | Coming soon |
| MCP-Atlas claim coverage | Coming soon | 89.1% | Coming soon |
| LAB all-pass (Anthropic harness) | Coming soon | 23.58% | Coming soon |
| LAB criterion-pass (Anthropic harness) | Coming soon | 93.74% | Coming soon |
| LAB all-pass (Harvey held-out) | Coming soon | 11.7% | Coming soon |
| LAB criterion-pass (Harvey held-out) | Coming soon | 94.1% | Coming soon |
| Toolathlon-Verified | Coming soon | 80.6% | Coming soon |
| Toolathlon Verified Pass@3 | Coming soon | 87.0% | Coming soon |
| Toolathlon Verified Pass³ | Coming soon | 73.1% | Coming soon |
| Toolathlon Verified avg. turns | Coming soon | 23.5 turns | Coming soon |
| AutomationBench | Coming soon | 26.0% | Coming soon |

### Coding

- Winner: Claude Fable 5
- Claude Fable 5 public-lane score: 76.9 (Supported · #2/183)
- Claude Opus 5 public-lane score: 75.6 (Supported · #3/183)

| Benchmark | Claude Fable 5 | Claude Opus 5 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 95% | 96% | Claude Opus 5 |
| SWE-bench Pro | 80% | 79.2% | Claude Fable 5 |
| FrontierSWE v2 | 48.0% | 52.0% | Claude Opus 5 |
| FrontierCode 1.1 Main | 53.5% | 53.4% | Claude Fable 5 |
| Terminal-Bench 2.0 | 84.3% | Coming soon | Coming soon |
| cursorBench31 | 70.6% | Coming soon | Coming soon |
| cursorBench32 | 70.5% | 70.0% | Claude Fable 5 |
| VulcanBench v3 | 89.5% | 87.0% | Claude Fable 5 |
| LiveCodeBench (Vals) | 89.8% | 89.0% | Claude Fable 5 |
| SWE-bench (Vals) | 95.0% | 97.0% | Claude Opus 5 |
| Bug Hunt Bench | Coming soon | 27 fixes | Coming soon |
| SWE Multilingual | Coming soon | 89.5% | Coming soon |
| SWE Multimodal | Coming soon | 59.4% | Coming soon |
| deepSwe | Coming soon | 68.8% | Coming soon |
| FrontierCode 1.1 Extended | Coming soon | 63.6% | Coming soon |
| ProgramBench (episode 1) | Coming soon | 83.0% | Coming soon |
| ProgramBench | Coming soon | 93.0% | Coming soon |
| VulcanBench CII v1 | Coming soon | 96.4% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- Claude Fable 5 public-lane score: 62.5 (Unranked · 2 rankable rows)
- Claude Opus 5 public-lane score: 88.7 (#2/48)

| Benchmark | Claude Fable 5 | Claude Opus 5 | Winner |
|-----------|-----------|-----------|--------|
| Blueprint-Bench 2 | 38.6% | Coming soon | Coming soon |
| OfficeQA Pro | 57.9% | 66.9% | Claude Opus 5 |
| Chartography (no tools) | Coming soon | 29.6% | Coming soon |
| Chartography (tools) | Coming soon | 83.0% | Coming soon |
| BenchCAD Vision2Code (no tools) | Coming soon | 0.366 | Coming soon |
| BenchCAD Vision2Code (tools) | Coming soon | 0.821 | Coming soon |
| GDP.pdf (no tools) | Coming soon | 83.4% | Coming soon |
| GDP.pdf (tools) | Coming soon | 85.5% | Coming soon |
| OfficeQA | Coming soon | 78.1% | Coming soon |

### Reasoning

- Winner: Coming soon
- Claude Fable 5 public-lane score: 76.2 (#11/22)
- Claude Opus 5 public-lane score: 75.6 (#13/22)

| Benchmark | Claude Fable 5 | Claude Opus 5 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | Coming soon | 97.50% | Coming soon |
| ARC-AGI-2 | Coming soon | 90.4% | Coming soon |
| ARC-AGI-3 | Coming soon | 30.2% | Coming soon |

### Knowledge

- Winner: Claude Fable 5
- Claude Fable 5 public-lane score: 83.5 (Supported · #2/181)
- Claude Opus 5 public-lane score: 82.1 (Supported · #3/181)

| Benchmark | Claude Fable 5 | Claude Opus 5 | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 93.2% | 93.4% | Claude Opus 5 |
| MMLU-Pro (Vals) | 91.5% | 91.6% | Claude Opus 5 |
| HLE | Coming soon | 64.7% | Coming soon |
| HLE w/o tools | Coming soon | 56.3% | Coming soon |
| HLE-Verified | Coming soon | 54.4% | Coming soon |
| LABBench2 | Coming soon | 84.2% | Coming soon |
| HealthBench (raw) | Coming soon | 67.1% | Coming soon |
| HealthBench (length-adjusted) | Coming soon | 57.8% | Coming soon |
| HealthBench Professional | Coming soon | 59.8% | Coming soon |
| HealthBench Professional (raw) | Coming soon | 73.4% | Coming soon |
| BioMysteryBench (human-solvable) | Coming soon | 90.1% | Coming soon |
| BioMysteryBench (human-difficult) | Coming soon | 49.4% | Coming soon |
| SpatialBench Verified | Coming soon | 72.5% | Coming soon |
| SingleCellBench | Coming soon | 60.6% | Coming soon |
| ProteinGym Hard | Coming soon | 47.7% | Coming soon |
| Protein Design | Coming soon | 42.5% | Coming soon |
| Organic chemistry V2 | Coming soon | 61.6% | Coming soon |
| Protocols (troubleshooting) | Coming soon | 61.1% | Coming soon |
| Protocols (understanding) | Coming soon | 78.4% | Coming soon |

### Instruction Following

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

### Multilingual

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

| Benchmark | Claude Fable 5 | Claude Opus 5 | Winner |
|-----------|-----------|-----------|--------|
| GMMLU | Coming soon | 92.5% | Coming soon |
| MILU | Coming soon | 92.1% | Coming soon |
| INCLUDE | Coming soon | 89.8% | Coming soon |

### Mathematics

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

| Benchmark | Claude Fable 5 | Claude Opus 5 | Winner |
|-----------|-----------|-----------|--------|
| IMO 2026 | Coming soon | 42/42 | Coming soon |
| RiemannBench (no tools) | Coming soon | 60.0% | Coming soon |
| RiemannBench (tools) | Coming soon | 79.0% | Coming soon |
| ArXivMath Jun. 2026 (no tools) | Coming soon | 90.8% | Coming soon |
| ArXivMath Jun. 2026 (tools) | Coming soon | 91.3% | Coming soon |

## FAQ

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

Claude Fable 5 is ahead overall on BenchLM right now.

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

The widest category gap is in multimodal & grounded, where the averages are 62.5 for Claude Fable 5 and 88.7 for Claude Opus 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 Opus 5 cover on BenchLM?

Claude Opus 5 currently has 73 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Fable 5 vs Claude Fable 5.1](/compare/claude-fable-vs-claude-fable-5-1)
- [Claude Opus 5 vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-claude-opus-5)
- [Claude Fable 5 vs GPT-6 Astra](/compare/claude-fable-vs-gpt-6-astra)
- [Claude Opus 5 vs GPT-6 Astra](/compare/claude-opus-5-vs-gpt-6-astra)

## Explore More

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