# Claude Fable 5 vs DeepSeek V3

> Side-by-side benchmark comparison for Claude Fable 5 and DeepSeek V3 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-fable-vs-deepseek-v3
- Last updated: September 4, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: Claude Fable 5 and DeepSeek V3 share only 1 sourced benchmark row.

## Summary

- Only 1 shared sourced benchmark row is available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- DeepSeek V3 has the lower published output-token price.
- Claude Fable 5 has the larger published context window at 1M+.

## Model Snapshot

| Property | Claude Fable 5 | DeepSeek V3 |
|----------|----------|----------|
| Creator | Anthropic | DeepSeek |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Non-Reasoning |
| Context | 1M+ | 128K |
| Independent public score (not head-to-head) | 80.9 | 43.74 |
| Benchmarks Covered | 18 | 6 |
| Pricing (input/output) | $10.00 / $50.00 | $0.27 / $1.10 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Claude Fable 5 public-lane score: 74.8 (Supported · #3/151)
- DeepSeek V3 public-lane score: 38.5 (Estimated · #124/151)

| Benchmark | Claude Fable 5 | DeepSeek V3 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 34.0% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 84.3% | Coming soon | Coming soon |
| OSWorld-Verified | 85% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 80.5% | Coming soon | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude Fable 5 public-lane score: 76.9 (Supported · #2/183)
- DeepSeek V3 public-lane score: 41.1 (Estimated · #135/183)

| Benchmark | Claude Fable 5 | DeepSeek V3 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 95% | 42% | Claude Fable 5 |
| SWE-bench Pro | 80% | Coming soon | Coming soon |
| FrontierSWE v2 | 48.0% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 53.5% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 84.3% | Coming soon | Coming soon |
| 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 |
| LiveCodeBench | Coming soon | 37.6% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude Fable 5 public-lane score: 62.5 (Unranked · 2 rankable rows)
- DeepSeek V3 public-lane score: Coming soon

| Benchmark | Claude Fable 5 | DeepSeek V3 | Winner |
|-----------|-----------|-----------|--------|
| Blueprint-Bench 2 | 38.6% | Coming soon | Coming soon |
| OfficeQA Pro | 57.9% | Coming soon | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Claude Fable 5 public-lane score: 76.2 (#11/22)
- DeepSeek V3 public-lane score: 43.8 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Insufficient shared evidence
- Claude Fable 5 public-lane score: 83.5 (Supported · #2/181)
- DeepSeek V3 public-lane score: 40.7 (Estimated · #136/181)

| Benchmark | Claude Fable 5 | DeepSeek V3 | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 93.2% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 91.5% | Coming soon | Coming soon |
| GPQA | Coming soon | 59.1% | Coming soon |
| MMLU-Pro | Coming soon | 75.9% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Claude Fable 5 public-lane score: 78.3 (#54/120)
- DeepSeek V3 public-lane score: 39.6 (#102/120)

| Benchmark | Claude Fable 5 | DeepSeek V3 | Winner |
|-----------|-----------|-----------|--------|
| IFEval | Coming soon | 86.1% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Claude Fable 5 public-lane score: Coming soon
- DeepSeek V3 public-lane score: 26.2 (Unranked · 1 rankable row)

| Benchmark | Claude Fable 5 | DeepSeek V3 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | Coming soon | 1.724% | Coming soon |

## FAQ

### Is there enough evidence to pick between Claude Fable 5 and DeepSeek V3?

Not yet. The models share only 1 sourced benchmark row, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [Claude Fable 5 vs Claude Fable 5.1](/compare/claude-fable-vs-claude-fable-5-1)
- [DeepSeek V3 vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-deepseek-v3)
- [Claude Fable 5 vs GPT-6 Astra](/compare/claude-fable-vs-gpt-6-astra)
- [DeepSeek V3 vs GPT-6 Astra](/compare/deepseek-v3-vs-gpt-6-astra)

## Explore More

- [Claude Fable 5 profile](/models/claude-fable)
- [DeepSeek V3 profile](/models/deepseek-v3)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)