# Gemini 4 Carbon vs GPT-5.6 Sol

> Side-by-side benchmark comparison for Gemini 4 Carbon and GPT-5.6 Sol across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemini-4-carbon-vs-gpt-5-6-sol
- Last updated: October 28, 2026

- Shared sourced benchmarks: 3
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: Gemini 4 Carbon and GPT-5.6 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.
- Gemini 4 Carbon has the lower published output-token price.
- GPT-5.6 Sol has the larger published context window at 1.05M.

## Model Snapshot

| Property | Gemini 4 Carbon | GPT-5.6 Sol |
|----------|----------|----------|
| Creator | Google | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | null | 1.05M |
| Independent public score (not head-to-head) | 88.42 | 74.84 |
| Benchmarks Covered | 9 | 44 |
| Pricing (input/output) | $2.00 / $10.00 | $4.00 / $20.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Gemini 4 Carbon public-lane score: Coming soon
- GPT-5.6 Sol public-lane score: 68.7 (Supported · #12/134)

| Benchmark | Gemini 4 Carbon | GPT-5.6 Sol | Winner |
|-----------|-----------|-----------|--------|
| AutomationBench | 53.9% | Coming soon | Coming soon |
| OSWorld 2.1 Offline | 81.5% | Coming soon | Coming soon |
| CWE-bench v1 | 71.0% | Coming soon | Coming soon |
| ExploitGym | 53.5% | 33.7% | Gemini 4 Carbon |
| Terminal-Bench 3.0 | Coming soon | 34.6% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 91.9% | Coming soon |
| BrowseComp | Coming soon | 92.2% | Coming soon |
| OSWorld 2.0 | Coming soon | 62.6% | Coming soon |
| CyberGym | Coming soon | 84.5% | Coming soon |
| Toolathlon | Coming soon | 58% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 85.8% | Coming soon |
| ApprenticeBench | Coming soon | 26% | Coming soon |
| MazeBench | Coming soon | 13% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Gemini 4 Carbon public-lane score: 82.2 (Supported · #3/156)
- GPT-5.6 Sol public-lane score: 67.7 (Supported · #11/156)

| Benchmark | Gemini 4 Carbon | GPT-5.6 Sol | Winner |
|-----------|-----------|-----------|--------|
| FrontierSWE v2 | 61.2% | 32.2% | Gemini 4 Carbon |
| Bug Hunt Bench | Coming soon | 42.0 fixes | Coming soon |
| SWE-bench Pro | Coming soon | 64.6% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 91.9% | Coming soon |
| DeepSWE | Coming soon | 72.7% | Coming soon |
| FrontierCode 1.1 Extended | Coming soon | 60.6% | Coming soon |
| CursorBench 3.2 | Coming soon | 67.2% | Coming soon |
| VulcanBench v3 | Coming soon | 87.0% | Coming soon |
| VulcanBench CII v1 | Coming soon | 86.5% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 82.6% | Coming soon |
| SWE-bench (Vals) | Coming soon | 96.2% | Coming soon |
| CursorBench 4.0 | Coming soon | 41.7% | Coming soon |
| PostTrainBench v1.1 | Coming soon | 36.2% | Coming soon |
| FrontierCode 2.0 | Coming soon | 27.6% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Gemini 4 Carbon public-lane score: 79.5 (Unranked · 2 rankable rows)
- GPT-5.6 Sol public-lane score: 76.4 (#12/26)

| Benchmark | Gemini 4 Carbon | GPT-5.6 Sol | Winner |
|-----------|-----------|-----------|--------|
| GraphWalks BFS 256K–1M | 96.2% | Coming soon | Coming soon |
| ARC-AGI-2 | Coming soon | 92.5% | Coming soon |
| ARC-AGI-3 | Coming soon | 7.8% | Coming soon |
| GeneBench-Pro | Coming soon | 28.7% | Coming soon |
| ARC-AGI-1 | Coming soon | 96.50% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Gemini 4 Carbon public-lane score: Coming soon
- GPT-5.6 Sol public-lane score: 90.1 (#7/58)

| Benchmark | Gemini 4 Carbon | GPT-5.6 Sol | Winner |
|-----------|-----------|-----------|--------|
| Chartography (no tools) | 72.5% | Coming soon | Coming soon |
| Blueprint-Bench 2 | 58.6% | Coming soon | Coming soon |
| ExtractBench (LlamaIndex) | Coming soon | 93.77% | Coming soon |
| ParseBench | Coming soon | 74.46% | Coming soon |
| MMMU-Pro | Coming soon | 83% | Coming soon |
| MMMU-Pro w/ Python | Coming soon | 84.6% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Gemini 4 Carbon public-lane score: 88.2 (Supported · #2/178)
- GPT-5.6 Sol public-lane score: 76.3 (Supported · #12/178)

| Benchmark | Gemini 4 Carbon | GPT-5.6 Sol | Winner |
|-----------|-----------|-----------|--------|
| GPQA | Coming soon | 94.6% | Coming soon |
| GPQA-D | Coming soon | 94.6% | Coming soon |
| HLE-Verified | Coming soon | 54.5% | Coming soon |
| LABBench2 | Coming soon | 82.1% | Coming soon |
| HealthBench Professional | Coming soon | 60.5% | Coming soon |
| HealthBench Hard | Coming soon | 33.1% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 95.2% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 89.1% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Gemini 4 Carbon public-lane score: Coming soon
- GPT-5.6 Sol public-lane score: 89.1 (#34/157)

| Benchmark | Gemini 4 Carbon | GPT-5.6 Sol | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | 0.0% | 27.0% | Gemini 4 Carbon |

### Mathematics

- Winner: Insufficient shared evidence
- Gemini 4 Carbon public-lane score: Coming soon
- GPT-5.6 Sol public-lane score: 95.8 (Unranked · 3 rankable rows)

| Benchmark | Gemini 4 Carbon | GPT-5.6 Sol | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath (legacy) | Coming soon | 89% | Coming soon |
| FrontierMath v2 (Tiers 1-3) | Coming soon | 89.000% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 83.000% | Coming soon |

## FAQ

### Is there enough evidence to pick between Gemini 4 Carbon and GPT-5.6 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

- [Gemini 4 Carbon vs Gemini 4 Argon](/compare/gemini-4-argon-vs-gemini-4-carbon)
- [GPT-5.6 Sol vs Gemini 4 Argon](/compare/gemini-4-argon-vs-gpt-5-6-sol)
- [Gemini 4 Carbon vs GPT-5.6 Terra](/compare/gemini-4-carbon-vs-gpt-5-6-terra)
- [GPT-5.6 Sol vs GPT-5.6 Terra](/compare/gpt-5-6-sol-vs-gpt-5-6-terra)

## Explore More

- [Gemini 4 Carbon profile](/models/gemini-4-carbon)
- [GPT-5.6 Sol profile](/models/gpt-5-6-sol)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)