# Claude 3 Opus vs Claude Fable 5

> Side-by-side benchmark comparison for Claude 3 Opus and Claude Fable 5 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-3-opus-vs-claude-fable
- Last updated: September 4, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Claude 3 Opus and Claude Fable 5.

## Summary

- Claude 3 Opus and Claude Fable 5 do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | Claude 3 Opus | Claude Fable 5 |
|----------|----------|----------|
| Creator | Anthropic | Anthropic |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 200K | 1M+ |
| Independent public score (not head-to-head) | 36.84 | 80.9 |
| Benchmarks Covered | 0 | 18 |
| Pricing (input/output) | $15.00 / $75.00 | $10.00 / $50.00 |

## Category Breakdown

### Agentic

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

| Benchmark | Claude 3 Opus | Claude Fable 5 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | Coming soon | 34.0% | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 84.3% | Coming soon |
| OSWorld-Verified | Coming soon | 85% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 80.5% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude 3 Opus public-lane score: 35.8 (Estimated · #154/183)
- Claude Fable 5 public-lane score: 76.9 (Supported · #2/183)

| Benchmark | Claude 3 Opus | Claude Fable 5 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | Coming soon | 95% | Coming soon |
| SWE-bench Pro | Coming soon | 80% | Coming soon |
| FrontierSWE v2 | Coming soon | 48.0% | Coming soon |
| FrontierCode 1.1 Main | Coming soon | 53.5% | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 84.3% | Coming soon |
| cursorBench31 | Coming soon | 70.6% | Coming soon |
| cursorBench32 | Coming soon | 70.5% | Coming soon |
| VulcanBench v3 | Coming soon | 89.5% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 89.8% | Coming soon |
| SWE-bench (Vals) | Coming soon | 95.0% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude 3 Opus public-lane score: Coming soon
- Claude Fable 5 public-lane score: 62.5 (Unranked · 2 rankable rows)

| Benchmark | Claude 3 Opus | Claude Fable 5 | Winner |
|-----------|-----------|-----------|--------|
| Blueprint-Bench 2 | Coming soon | 38.6% | Coming soon |
| OfficeQA Pro | Coming soon | 57.9% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Claude 3 Opus public-lane score: Coming soon
- Claude Fable 5 public-lane score: 76.2 (#11/22)

### Knowledge

- Winner: Insufficient shared evidence
- Claude 3 Opus public-lane score: 34.9 (Estimated · #165/181)
- Claude Fable 5 public-lane score: 83.5 (Supported · #2/181)

| Benchmark | Claude 3 Opus | Claude Fable 5 | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | Coming soon | 93.2% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 91.5% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Claude 3 Opus public-lane score: Coming soon
- Claude Fable 5 public-lane score: 78.3 (#54/120)

## FAQ

### Can I compare Claude 3 Opus and Claude Fable 5 on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

- [Claude 3 Opus vs Claude Fable 5.1](/compare/claude-3-opus-vs-claude-fable-5-1)
- [Claude Fable 5 vs Claude Fable 5.1](/compare/claude-fable-vs-claude-fable-5-1)
- [Claude 3 Opus vs GPT-6 Astra](/compare/claude-3-opus-vs-gpt-6-astra)
- [Claude Fable 5 vs GPT-6 Astra](/compare/claude-fable-vs-gpt-6-astra)

## Explore More

- [Claude 3 Opus profile](/models/claude-3-opus)
- [Claude Fable 5 profile](/models/claude-fable)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)