# Claude Fable 5.1 vs GPT-6.1 Sol

> Side-by-side benchmark comparison for Claude Fable 5.1 and GPT-6.1 Sol across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-fable-5-1-vs-gpt-6-1-sol
- Last updated: September 29, 2026

- Shared sourced benchmarks: 3
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

Evidence is too thin for a benchmark verdict: Claude Fable 5.1 and GPT-6.1 Sol share only 3 sourced benchmark rows.

## Summary

- Only 3 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- GPT-6.1 Sol has the lower published output-token price.
- GPT-6.1 Sol has the larger published context window at 1.05M.

## Model Snapshot

| Property | Claude Fable 5.1 | GPT-6.1 Sol |
|----------|----------|----------|
| Creator | Anthropic | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1.05M |
| Independent public score (not head-to-head) | 82.5 | 66.86 |
| Benchmarks Covered | 26 | 9 |
| Pricing (input/output) | $10.00 / $50.00 | $2.00 / $10.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Claude Fable 5.1 public-lane score: 78.9 (Supported · #2/117)
- GPT-6.1 Sol public-lane score: Coming soon

| Benchmark | Claude Fable 5.1 | GPT-6.1 Sol | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 4.0 | 55.80% | Coming soon | Coming soon |
| Terminal-Bench-Science 0.1 | 52.6% | 57.0% | GPT-6.1 Sol |
| OSWorld 2.0 | 41.7% | Coming soon | Coming soon |
| AutomationBench | 31.4% | 36.1% | GPT-6.1 Sol |
| Toolathlon-Verified | 77.8% | Coming soon | Coming soon |
| 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% | Coming soon | Coming soon |
| ApprenticeBench | 72% | Coming soon | Coming soon |
| ExploitGym | Coming soon | 35.1% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude Fable 5.1 public-lane score: 80 (Supported · #3/143)
- GPT-6.1 Sol public-lane score: 67 (Supported · #8/143)

| Benchmark | Claude Fable 5.1 | GPT-6.1 Sol | Winner |
|-----------|-----------|-----------|--------|
| Bug Hunt Bench | 43 fixes | Coming soon | Coming soon |
| 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% | 71.9% | GPT-6.1 Sol |
| FrontierSWE v2 | 56.3% | Coming soon | Coming soon |
| ProgramBench | 87.6% | Coming soon | Coming soon |
| cursorBench32 | 73.4% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 90.5% | Coming soon | Coming soon |
| cursorBench40 | 51.8% | Coming soon | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Claude Fable 5.1 public-lane score: 81.4 (#3/27)
- GPT-6.1 Sol public-lane score: 79.4 (Unranked · 2 rankable rows)

| Benchmark | Claude Fable 5.1 | GPT-6.1 Sol | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | 97.50% | Coming soon | Coming soon |
| ARC-AGI-2 | 90% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude Fable 5.1 public-lane score: Coming soon
- GPT-6.1 Sol public-lane score: 83.9 (Unranked · 1 rankable row)

### Knowledge

- Winner: Insufficient shared evidence
- Claude Fable 5.1 public-lane score: 85.4 (Supported · #3/169)
- GPT-6.1 Sol public-lane score: 71.3 (Estimated · #10/169)

| Benchmark | Claude Fable 5.1 | GPT-6.1 Sol | Winner |
|-----------|-----------|-----------|--------|
| HLE | 65% | Coming soon | Coming soon |
| HLE w/o tools | 60.9% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 93.4% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 92.4% | Coming soon | Coming soon |
| HealthBench (raw) | Coming soon | 56.7% | Coming soon |
| HealthBench (length-adjusted) | Coming soon | 58.5% | Coming soon |
| HealthBench Professional | Coming soon | 64.2% | Coming soon |
| HealthBench Professional (raw) | Coming soon | 67.2% | Coming soon |
| HealthBench Hard | Coming soon | 36.2% | Coming soon |

## FAQ

### Is there enough evidence to pick between Claude Fable 5.1 and GPT-6.1 Sol?

Not yet. The models share only 3 sourced benchmark rows, 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 5.1 vs Claude Fable 5](/compare/claude-fable-vs-claude-fable-5-1)
- [GPT-6.1 Sol vs Claude Fable 5](/compare/claude-fable-vs-gpt-6-1-sol)
- [Claude Fable 5.1 vs GPT-6 Astra](/compare/claude-fable-5-1-vs-gpt-6-astra)
- [GPT-6.1 Sol vs GPT-6 Astra](/compare/gpt-6-1-sol-vs-gpt-6-astra)

## Explore More

- [Claude Fable 5.1 profile](/models/claude-fable-5-1)
- [GPT-6.1 Sol profile](/models/gpt-6-1-sol)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)