# GPT-5.6 Sol vs Inkling 2 Small

> Side-by-side benchmark comparison for GPT-5.6 Sol and Inkling 2 Small across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-6-sol-vs-inkling-2-small
- Last updated: November 7, 2026

- Shared sourced benchmarks: 6
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

GPT-5.6 Sol leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- GPT-5.6 Sol has the higher overall point estimate 74.81 to 59.06. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in knowledge, where the averages are 76.3 for GPT-5.6 Sol and 60.4 for Inkling 2 Small.
- The biggest single benchmark swing is Terminal-Bench 2.1 in Agentic, with scores of 91.9% and 85.1%.
- Inkling 2 Small is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- GPT-5.6 Sol also has the larger context window at 1.05M.

## Model Snapshot

| Property | GPT-5.6 Sol | Inkling 2 Small |
|----------|----------|----------|
| Creator | OpenAI | Thinking Machines Lab |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Hybrid |
| Context | 1.05M | 1M |
| Overall Score | 74.81 | 59.06 |
| Benchmarks Covered | 46 | 25 |
| Pricing (input/output) | $4.00 / $20.00 | $0.30 / $1.00 |

## Category Breakdown

### Agentic

- Winner: GPT-5.6 Sol
- GPT-5.6 Sol public-lane score: 67.7 (Supported · #13/131)
- Inkling 2 Small public-lane score: 59.9 (Supported · #26/131)

| Benchmark | GPT-5.6 Sol | Inkling 2 Small | Winner |
|-----------|-----------|-----------|--------|
| LifeVal | 80.0% | Coming soon | Coming soon |
| Terminal-Bench 3.0 | 34.6% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 91.9% | 85.1% | GPT-5.6 Sol |
| BrowseComp | 92.2% | 90.2% | GPT-5.6 Sol |
| OSWorld 2.0 | 62.6% | Coming soon | Coming soon |
| CyberGym | 84.5% | Coming soon | Coming soon |
| ExploitGym | 33.7% | Coming soon | Coming soon |
| Toolathlon | 58% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 85.8% | Coming soon | Coming soon |
| ApprenticeBench | 26% | Coming soon | Coming soon |
| MazeBench | 13% | Coming soon | Coming soon |
| DeepSearchQA | Coming soon | 90.9% | Coming soon |
| MCP Atlas | Coming soon | 85% | Coming soon |
| JobBench | Coming soon | 70.5% | Coming soon |

### Coding

- Winner: GPT-5.6 Sol
- GPT-5.6 Sol public-lane score: 67.3 (Supported · #11/157)
- Inkling 2 Small public-lane score: 59.7 (Supported · #20/157)

| Benchmark | GPT-5.6 Sol | Inkling 2 Small | Winner |
|-----------|-----------|-----------|--------|
| Bug Hunt Bench | 42.0 fixes | Coming soon | Coming soon |
| SWE-bench Pro | 64.6% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 91.9% | 85.1% | GPT-5.6 Sol |
| DeepSWE | 72.7% | 72.1% | GPT-5.6 Sol |
| FrontierCode 1.1 Extended | 60.6% | Coming soon | Coming soon |
| FrontierSWE v2 | 32.2% | Coming soon | Coming soon |
| CursorBench 3.2 | 67.2% | Coming soon | Coming soon |
| VulcanBench v3 | 87.0% | Coming soon | Coming soon |
| VulcanBench CII v1 | 86.5% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 82.6% | Coming soon | Coming soon |
| SWE-bench (Vals) | 96.2% | Coming soon | Coming soon |
| CursorBench 4.0 | 41.7% | Coming soon | Coming soon |
| PostTrainBench v1.1 | 36.2% | Coming soon | Coming soon |
| FrontierCode 2.0 | 27.6% | Coming soon | Coming soon |
| SWE-bench Verified | Coming soon | 82.2% | Coming soon |
| SWE Multilingual | Coming soon | 81.2% | Coming soon |
| sweMarathon | Coming soon | 38.8% | Coming soon |
| PostTrainBench v1.2 | Coming soon | 31.9% | Coming soon |

### Reasoning

- Winner: Not comparable
- GPT-5.6 Sol public-lane score: 74.5 (#10/25)
- Inkling 2 Small public-lane score: 86.1 (Unranked · 2 rankable rows)

| Benchmark | GPT-5.6 Sol | Inkling 2 Small | Winner |
|-----------|-----------|-----------|--------|
| BioBasicsBench | 45.6% | Coming soon | Coming soon |
| ARC-AGI-2 | 92.5% | Coming soon | Coming soon |
| ARC-AGI-3 | 7.8% | Coming soon | Coming soon |
| GeneBench-Pro | 28.7% | Coming soon | Coming soon |
| ARC-AGI-1 | 96.50% | Coming soon | Coming soon |
| LongBench v2 | Coming soon | 70.6% | Coming soon |

### Multimodal & Grounded

- Winner: Directional only
- GPT-5.6 Sol public-lane score: 89.7 (#7/59)
- Inkling 2 Small public-lane score: 86.6 (#12/59)

| Benchmark | GPT-5.6 Sol | Inkling 2 Small | Winner |
|-----------|-----------|-----------|--------|
| ExtractBench (LlamaIndex) | 93.77% | Coming soon | Coming soon |
| ParseBench | 74.40% | Coming soon | Coming soon |
| MMMU-Pro | 83% | Coming soon | Coming soon |
| MMMU-Pro w/ Python | 84.6% | Coming soon | Coming soon |
| CharXiv | Coming soon | 87.7% | Coming soon |
| CharXiv w/o tools | Coming soon | 85.6% | Coming soon |
| Chartography (no tools) | Coming soon | 36.7% | Coming soon |
| Chartography (tools) | Coming soon | 80.4% | Coming soon |
| BabyVision | Coming soon | 68.6% | Coming soon |
| BabyVision w/ Python | Coming soon | 93.7% | Coming soon |
| ScreenSpot Pro | Coming soon | 83.8% | Coming soon |
| PerceptionBench | Coming soon | 64.7% | Coming soon |
| MathVision | Coming soon | 92.8% | Coming soon |

### Knowledge

- Winner: Directional only
- GPT-5.6 Sol public-lane score: 76.3 (Supported · #11/178)
- Inkling 2 Small public-lane score: 60.4 (Estimated · #46/178)

| Benchmark | GPT-5.6 Sol | Inkling 2 Small | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 94.6% | 93% | GPT-5.6 Sol |
| GPQA-D | 94.6% | 93.0% | GPT-5.6 Sol |
| HLE-Verified | 54.5% | Coming soon | Coming soon |
| LABBench2 | 82.1% | Coming soon | Coming soon |
| HealthBench Professional | 60.5% | Coming soon | Coming soon |
| HealthBench Hard | 33.1% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 95.2% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 89.1% | Coming soon | Coming soon |

### Instruction Following

- Winner: Not comparable
- GPT-5.6 Sol public-lane score: 89.1 (#34/157)
- Inkling 2 Small public-lane score: Coming soon

| Benchmark | GPT-5.6 Sol | Inkling 2 Small | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | 27.0% | Coming soon | Coming soon |

### Mathematics

- Winner: Not comparable
- GPT-5.6 Sol public-lane score: 92.3 (Unranked · 3 rankable rows)
- Inkling 2 Small public-lane score: 85.9 (Unranked · 2 rankable rows)

| Benchmark | GPT-5.6 Sol | Inkling 2 Small | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath (legacy) | 89% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 89.000% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 83.000% | Coming soon | Coming soon |
| HMMT Feb 2026 | Coming soon | 95.8% | Coming soon |
| Apex | Coming soon | 63.5% | Coming soon |

## FAQ

### Which is better overall, GPT-5.6 Sol or Inkling 2 Small?

GPT-5.6 Sol has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### Where is the biggest gap between GPT-5.6 Sol and Inkling 2 Small?

The widest category gap is in knowledge, where the averages are 76.3 for GPT-5.6 Sol and 60.4 for Inkling 2 Small.

### How many benchmarks does GPT-5.6 Sol cover on BenchLM?

GPT-5.6 Sol currently has 46 sourced benchmark scores on BenchLM.

### How many benchmarks does Inkling 2 Small cover on BenchLM?

Inkling 2 Small currently has 25 sourced benchmark scores on BenchLM.

## Related Comparisons

- [GPT-5.6 Sol vs GPT-5.6 Terra](/compare/gpt-5-6-sol-vs-gpt-5-6-terra)
- [Inkling 2 Small vs GPT-5.6 Terra](/compare/gpt-5-6-terra-vs-inkling-2-small)
- [GPT-5.6 Sol vs GPT-5.6 Luna](/compare/gpt-5-6-luna-vs-gpt-5-6-sol)
- [Inkling 2 Small vs GPT-5.6 Luna](/compare/gpt-5-6-luna-vs-inkling-2-small)

## Explore More

- [GPT-5.6 Sol profile](/models/gpt-5-6-sol)
- [Inkling 2 Small profile](/models/inkling-2-small)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)