# Claude Fable 5.2 vs Claude Opus 5

> Side-by-side benchmark comparison for Claude Fable 5.2 and Claude Opus 5 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-fable-5-2-vs-claude-opus-5
- Last updated: November 9, 2026

- Shared sourced benchmarks: 19
- 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 91.19 to 79.11. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in knowledge, where the averages are 97.6 for Claude Fable 5.2 and 80.3 for Claude Opus 5.
- The biggest single benchmark swing is Chartography (no tools) in Multimodal & Grounded, with scores of 73.4% and 29.6%.
- Claude Opus 5 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Claude Fable 5.2 also has the larger context window at 1M.

## Model Snapshot

| Property | Claude Fable 5.2 | Claude Opus 5 |
|----------|----------|----------|
| Creator | Anthropic | Anthropic |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | null |
| Overall Score | 91.19 | 79.11 |
| Benchmarks Covered | 30 | 84 |
| Pricing (input/output) | $8.00 / $40.00 | $5.00 / $25.00 |

## Category Breakdown

### Agentic

- Winner: Directional only
- Claude Fable 5.2 public-lane score: 90.7 (Estimated · #1/132)
- Claude Opus 5 public-lane score: 77 (Supported · #5/132)

| Benchmark | Claude Fable 5.2 | Claude Opus 5 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 4.0 | 67.60% | Coming soon | Coming soon |
| Terminal-Bench-Science 0.1 | 74.6% | Coming soon | Coming soon |
| AutomationBench | 51.4% | 26.0% | Claude Fable 5.2 |
| OSWorld 2.1 Offline | 89.3% | Coming soon | Coming soon |
| 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% | 88.6% | Claude Opus 5 |
| Terminal-Bench 4.1 | Coming soon | 53.30% | Coming soon |
| Terminal-Bench 3.0 | Coming soon | 42.7% | Coming soon |
| BrowseComp | Coming soon | 90.8% | Coming soon |
| HLE w/ tools | Coming soon | 64.7% | Coming soon |
| DeepSearchQA | Coming soon | 95.0% | 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 |
| Terminal-Bench 2.1 (Vals) | Coming soon | 84.6% | Coming soon |
| ApprenticeBench | Coming soon | 36% | Coming soon |
| MazeBench | Coming soon | 12% | Coming soon |
| OSWorld 2.1 | Coming soon | 74.0% | Coming soon |

### Coding

- Winner: Directional only
- Claude Fable 5.2 public-lane score: 86.9 (Estimated · #1/158)
- Claude Opus 5 public-lane score: 70.4 (Supported · #10/158)

| Benchmark | Claude Fable 5.2 | Claude Opus 5 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | 93% | 79.2% | Claude Fable 5.2 |
| SWE Multilingual | 96.6% | 89.5% | Claude Fable 5.2 |
| SWE Multimodal | 74.1% | 59.4% | Claude Fable 5.2 |
| DeepSWE | 74.3% | 68.8% | Claude Fable 5.2 |
| FrontierSWE v2 | 69.9% | 52.0% | Claude Fable 5.2 |
| ProgramBench | 85.6% | 93.0% | Claude Opus 5 |
| FrontierCode 2.0 | 49.1% | 26.7% | Claude Fable 5.2 |
| CursorBench 4.0 | 60.0% | 46.6% | Claude Fable 5.2 |
| ScarfBench | Coming soon | 69.8% | Coming soon |
| Bug Hunt Bench | Coming soon | 27.0 fixes | Coming soon |
| SWE-bench Verified | Coming soon | 96% | Coming soon |
| FrontierCode 1.1 Main | Coming soon | 53.4% | Coming soon |
| FrontierCode 1.1 Extended | Coming soon | 63.6% | Coming soon |
| ProgramBench (episode 1) | Coming soon | 83.0% | Coming soon |
| CursorBench 3.2 | Coming soon | 70.0% | Coming soon |
| VulcanBench v3 | Coming soon | 87.0% | Coming soon |
| VulcanBench CII v1 | Coming soon | 96.4% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 89.0% | Coming soon |
| SWE-bench (Vals) | Coming soon | 97.0% | Coming soon |
| PostTrainBench v1.1 | Coming soon | 35.0% | Coming soon |

### Reasoning

- Winner: Claude Fable 5.2
- Claude Fable 5.2 public-lane score: 90.7 (Supported · #1/157)
- Claude Opus 5 public-lane score: 74.8 (Supported · #11/157)

| Benchmark | Claude Fable 5.2 | Claude Opus 5 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-3 | 65.7% | 30.2% | Claude Fable 5.2 |
| ARC-AGI-3 Provider Adapter | 94.90% | Coming soon | Coming soon |
| STEM Professor Bench | 61.8% | Coming soon | Coming soon |
| ARC-AGI-1 | Coming soon | 97.50% | Coming soon |
| ARC-AGI-2 | Coming soon | 90.4% | Coming soon |

### Multimodal & Grounded

- Winner: Directional only
- Claude Fable 5.2 public-lane score: 89.8 (Estimated · #1/67)
- Claude Opus 5 public-lane score: 77.8 (Estimated · #6/67)

| Benchmark | Claude Fable 5.2 | Claude Opus 5 | Winner |
|-----------|-----------|-----------|--------|
| Chartography (no tools) | 73.4% | 29.6% | Claude Fable 5.2 |
| Chartography (tools) | 91.6% | 83.0% | Claude Fable 5.2 |
| OfficeQA | 83.4% | 78.1% | Claude Fable 5.2 |
| OfficeQA Pro | 72.9% | 66.9% | Claude Fable 5.2 |
| BenchCAD 2.1 | 75.4% | Coming soon | Coming soon |
| BenchCAD 2.1 (tools) | 83.5% | Coming soon | 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 |

### Knowledge

- Winner: Claude Fable 5.2
- Claude Fable 5.2 public-lane score: 97.6 (Supported · #1/179)
- Claude Opus 5 public-lane score: 80.3 (Supported · #6/179)

| Benchmark | Claude Fable 5.2 | Claude Opus 5 | Winner |
|-----------|-----------|-----------|--------|
| HLE | 74.2% | 64.7% | Claude Fable 5.2 |
| HLE w/o tools | 73.2% | 56.3% | Claude Fable 5.2 |
| PhysicianBench | 64.4% | Coming soon | 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 |
| GPQA Diamond (Vals) | Coming soon | 93.4% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 91.6% | Coming soon |

### Multilingual

- Winner: Not comparable
- Claude Fable 5.2 public-lane score: Coming soon
- Claude Opus 5 public-lane score: Coming soon

| Benchmark | Claude Fable 5.2 | Claude Opus 5 | Winner |
|-----------|-----------|-----------|--------|
| GMMLU | 96.0% | 92.5% | Claude Fable 5.2 |
| MILU | 94.1% | 92.1% | Claude Fable 5.2 |
| INCLUDE | Coming soon | 89.8% | Coming soon |

### Instruction Following

- Winner: Not comparable
- Claude Fable 5.2 public-lane score: Coming soon
- Claude Opus 5 public-lane score: Coming soon

| Benchmark | Claude Fable 5.2 | Claude Opus 5 | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | Coming soon | 4.6% | Coming soon |

### Mathematics

- Winner: Not comparable
- Claude Fable 5.2 public-lane score: Coming soon
- Claude Opus 5 public-lane score: 88.1 (Unranked · 7 rankable rows)

| Benchmark | Claude Fable 5.2 | 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 |
| FrontierMath v2 (Tiers 1-3) | Coming soon | 85.614% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 73.171% | Coming soon |

## FAQ

### Which is better overall, Claude Fable 5.2 or Claude Opus 5?

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

### Where is the biggest gap between Claude Fable 5.2 and Claude Opus 5?

The widest category gap is in knowledge, where the averages are 97.6 for Claude Fable 5.2 and 80.3 for Claude Opus 5.

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

Claude Fable 5.2 currently has 30 sourced benchmark scores on BenchLM.

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

Claude Opus 5 currently has 84 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)
- [Claude Opus 5 vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-claude-opus-5)
- [Claude Fable 5.2 vs Claude Fable 5](/compare/claude-fable-vs-claude-fable-5-2)
- [Claude Opus 5 vs Claude Fable 5](/compare/claude-fable-vs-claude-opus-5)

## Explore More

- [Claude Fable 5.2 profile](/models/claude-fable-5-2)
- [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)