# Claude Fable 5.1 vs Kimi K3

> Side-by-side benchmark comparison for Claude Fable 5.1 and Kimi K3 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-fable-5-1-vs-kimi-k3
- Last updated: October 17, 2026

- Shared sourced benchmarks: 19
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Pick Claude Fable 5.1 if you want the stronger benchmark profile. Kimi K3 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Claude Fable 5.1 leads overall 83.18 to 69.87.
- The clearest category separation is in knowledge, where the averages are 86.9 for Claude Fable 5.1 and 68.8 for Kimi K3.
- The biggest single benchmark swing is ApprenticeBench in Agentic, with scores of 72% and 18%.
- Kimi K3 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Kimi K3 also has the larger context window at 1.05M.

## Model Snapshot

| Property | Claude Fable 5.1 | Kimi K3 |
|----------|----------|----------|
| Creator | Anthropic | Moonshot AI |
| Type | Proprietary | Pending |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1.05M |
| Overall Score | 83.18 | 69.87 |
| Benchmarks Covered | 33 | 52 |
| Pricing (input/output) | $10.00 / $50.00 | $3.00 / $15.00 |

## Category Breakdown

### Agentic

- Winner: Claude Fable 5.1
- Claude Fable 5.1 public-lane score: 80.9 (Supported · #2/128)
- Kimi K3 public-lane score: 69.4 (Supported · #10/128)

| Benchmark | Claude Fable 5.1 | Kimi K3 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 4.0 | 55.80% | Coming soon | Coming soon |
| Terminal-Bench-Science 0.1 | 52.6% | Coming soon | Coming soon |
| OSWorld 2.0 | 41.7% | Coming soon | Coming soon |
| AutomationBench | 31.4% | 30.8% | Claude Fable 5.1 |
| Toolathlon-Verified | 77.8% | 73.2% | Claude Fable 5.1 |
| Toolathlon Verified Pass@3 | 81.5% | Coming soon | Coming soon |
| Toolathlon Verified Pass³ | 73.1% | Coming soon | Coming soon |
| Toolathlon Verified avg. turns | 23.7 turns | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 85.0% | 80.9% | Claude Fable 5.1 |
| ApprenticeBench | 72% | 18% | Claude Fable 5.1 |
| CWE-bench v1 | 58.0% | Coming soon | Coming soon |
| MazeBench | 10% | 1% | Claude Fable 5.1 |
| Terminal-Bench 2.1 | Coming soon | 88.3% | Coming soon |
| BrowseComp | Coming soon | 91.2% | Coming soon |
| DeepSearchQA | Coming soon | 95.0% | Coming soon |
| MCP Atlas | Coming soon | 84.2% | Coming soon |
| JobBench | Coming soon | 52.9% | Coming soon |
| APEX-Agents | Coming soon | 37.6% | Coming soon |
| SpreadsheetBench 2 | Coming soon | 34.8% | Coming soon |
| DECK-Bench | Coming soon | 73.5% | Coming soon |
| Hermes Index | Coming soon | 39.2% | Coming soon |
| Hermes Bench | Coming soon | 71.5% | Coming soon |

### Coding

- Winner: Claude Fable 5.1
- Claude Fable 5.1 public-lane score: 76.8 (Supported · #3/150)
- Kimi K3 public-lane score: 58.9 (Supported · #22/150)

| Benchmark | Claude Fable 5.1 | Kimi K3 | Winner |
|-----------|-----------|-----------|--------|
| Bug Hunt Bench | 43.0 fixes | 21.0 fixes | Claude Fable 5.1 |
| SWE-bench Pro | 81.2% | Coming soon | Coming soon |
| SWE Multilingual | 89.1% | Coming soon | Coming soon |
| SWE Multimodal | 54.7% | Coming soon | Coming soon |
| DeepSWE | 67.4% | 67.5% | Kimi K3 |
| FrontierSWE v2 | 56.3% | 25.9% | Claude Fable 5.1 |
| ProgramBench | 87.6% | 77.8% | Claude Fable 5.1 |
| CursorBench 3.2 | 73.4% | 60.8% | Claude Fable 5.1 |
| LiveCodeBench (Vals) | 90.5% | 87.2% | Claude Fable 5.1 |
| CursorBench 4.0 | 51.8% | Coming soon | Coming soon |
| PostTrainBench v1.1 | 40.2% | 32.0% | Claude Fable 5.1 |
| FrontierSWE | Coming soon | 81.2% | Coming soon |
| Kimi Code Bench v2 | Coming soon | 72.9% | Coming soon |
| sweMarathon | Coming soon | 42% | Coming soon |
| PostTrain Bench | Coming soon | 36.6% | Coming soon |
| MLS-Bench Lite | Coming soon | 48.3% | Coming soon |
| VulcanBench v3 | Coming soon | 73.7% | Coming soon |
| OpenHarmony Bench | Coming soon | 57.3% | Coming soon |
| SWE-bench (Vals) | Coming soon | 93.4% | Coming soon |

### Reasoning

- Winner: Claude Fable 5.1
- Claude Fable 5.1 public-lane score: 85.2 (#4/28)
- Kimi K3 public-lane score: 70 (#21/28)

| Benchmark | Claude Fable 5.1 | Kimi K3 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | 97.50% | 94.50% | Claude Fable 5.1 |
| ARC-AGI-2 | 90% | 60.4% | Claude Fable 5.1 |
| GraphWalks BFS 256K–1M | 65.0% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Claude Fable 5.1 public-lane score: Coming soon
- Kimi K3 public-lane score: 92.6 (#1/54)

| Benchmark | Claude Fable 5.1 | Kimi K3 | Winner |
|-----------|-----------|-----------|--------|
| OfficeQA Pro | Coming soon | 63.3% | Coming soon |
| MMMU-Pro | Coming soon | 81.6% | Coming soon |
| MMMU-Pro w/ Python | Coming soon | 83.4% | Coming soon |
| CharXiv w/o tools | Coming soon | 84.8% | Coming soon |
| CharXiv | Coming soon | 91.3% | Coming soon |
| MathVision | Coming soon | 94.3% | Coming soon |
| MathVision w/ Python | Coming soon | 97.8% | Coming soon |
| BabyVision w/ Python | Coming soon | 85.7% | Coming soon |
| ZeroBench | Coming soon | 23.0% | Coming soon |
| ZeroBench w/ Python | Coming soon | 41.0% | Coming soon |
| WorldVQA ForceAnswer | Coming soon | 51.0% | Coming soon |
| OmniDocBench | Coming soon | 91.1% | Coming soon |
| PerceptionBench | Coming soon | 58.5% | Coming soon |

### Knowledge

- Winner: Claude Fable 5.1
- Claude Fable 5.1 public-lane score: 86.9 (Supported · #2/184)
- Kimi K3 public-lane score: 68.8 (Supported · #21/184)

| Benchmark | Claude Fable 5.1 | Kimi K3 | Winner |
|-----------|-----------|-----------|--------|
| HLE | 65% | 56% | Claude Fable 5.1 |
| HLE w/o tools | 60.9% | 43.5% | Claude Fable 5.1 |
| GPQA Diamond (Vals) | 93.4% | 92.9% | Claude Fable 5.1 |
| MMLU-Pro (Vals) | 92.4% | 88.0% | Claude Fable 5.1 |
| GPQA | Coming soon | 93.5% | Coming soon |
| GPQA-D | Coming soon | 93.5% | Coming soon |

### Instruction Following

- Winner: Not comparable
- Claude Fable 5.1 public-lane score: Coming soon
- Kimi K3 public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | Kimi K3 | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | 1.0% | 52.7% | Claude Fable 5.1 |

### Mathematics

- Winner: Not comparable
- Claude Fable 5.1 public-lane score: 96.8 (Unranked · 2 rankable rows)
- Kimi K3 public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | Kimi K3 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 90.175% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 87.805% | Coming soon | Coming soon |

## FAQ

### Which is better overall, Claude Fable 5.1 or Kimi K3?

Claude Fable 5.1 is ahead overall on BenchLM right now.

### Where is the biggest gap between Claude Fable 5.1 and Kimi K3?

The widest category gap is in knowledge, where the averages are 86.9 for Claude Fable 5.1 and 68.8 for Kimi K3.

### How many benchmarks does Claude Fable 5.1 cover on BenchLM?

Claude Fable 5.1 currently has 33 sourced benchmark scores on BenchLM.

### How many benchmarks does Kimi K3 cover on BenchLM?

Kimi K3 currently has 52 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Fable 5.1 vs Claude Fable 5](/compare/claude-fable-vs-claude-fable-5-1)
- [Kimi K3 vs Claude Fable 5](/compare/claude-fable-vs-kimi-k3)
- [Claude Fable 5.1 vs Claude Opus 5.5](/compare/claude-fable-5-1-vs-claude-opus-5-5)
- [Kimi K3 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-kimi-k3)

## Explore More

- [Claude Fable 5.1 profile](/models/claude-fable-5-1)
- [Kimi K3 profile](/models/kimi-k3)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)