# Gemini 4 Carbon vs GPT-5.4 Pro

> Side-by-side benchmark comparison for Gemini 4 Carbon and GPT-5.4 Pro across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

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

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Gemini 4 Carbon and GPT-5.4 Pro.

## Summary

- Gemini 4 Carbon and GPT-5.4 Pro do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | Gemini 4 Carbon | GPT-5.4 Pro |
|----------|----------|----------|
| Creator | Google | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | null | 1.05M |
| Independent public score (not head-to-head) | 88.42 | 68.24 |
| Benchmarks Covered | 9 | 11 |
| Pricing (input/output) | $2.00 / $10.00 | $30.00 / $180.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Gemini 4 Carbon public-lane score: Coming soon
- GPT-5.4 Pro public-lane score: Coming soon

| Benchmark | Gemini 4 Carbon | GPT-5.4 Pro | 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% | Coming soon | Coming soon |
| BrowseComp | Coming soon | 89.3% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Gemini 4 Carbon public-lane score: 82.2 (Supported · #3/156)
- GPT-5.4 Pro public-lane score: Coming soon

| Benchmark | Gemini 4 Carbon | GPT-5.4 Pro | Winner |
|-----------|-----------|-----------|--------|
| FrontierSWE v2 | 61.2% | Coming soon | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Gemini 4 Carbon public-lane score: 79.5 (Unranked · 2 rankable rows)
- GPT-5.4 Pro public-lane score: 78.1 (Unranked · 3 rankable rows)

| Benchmark | Gemini 4 Carbon | GPT-5.4 Pro | Winner |
|-----------|-----------|-----------|--------|
| GraphWalks BFS 256K–1M | 96.2% | Coming soon | Coming soon |
| ARC-AGI-2 | Coming soon | 83.3% | Coming soon |
| ARC-AGI-1 | Coming soon | 94.50% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Gemini 4 Carbon public-lane score: Coming soon
- GPT-5.4 Pro public-lane score: Coming soon

| Benchmark | Gemini 4 Carbon | GPT-5.4 Pro | Winner |
|-----------|-----------|-----------|--------|
| Chartography (no tools) | 72.5% | Coming soon | Coming soon |
| Blueprint-Bench 2 | 58.6% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Gemini 4 Carbon public-lane score: 88.2 (Supported · #2/178)
- GPT-5.4 Pro public-lane score: Coming soon

| Benchmark | Gemini 4 Carbon | GPT-5.4 Pro | Winner |
|-----------|-----------|-----------|--------|
| HLE | Coming soon | 58.7% | Coming soon |
| FrontierScience | Coming soon | 36.7% | Coming soon |
| FrontierScience Research | Coming soon | 36.7% | Coming soon |
| HLE w/o tools | Coming soon | 42.7% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Gemini 4 Carbon public-lane score: Coming soon
- GPT-5.4 Pro public-lane score: Coming soon

| Benchmark | Gemini 4 Carbon | GPT-5.4 Pro | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | 0.0% | Coming soon | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Gemini 4 Carbon public-lane score: Coming soon
- GPT-5.4 Pro public-lane score: 86.5 (Unranked · 4 rankable rows)

| Benchmark | Gemini 4 Carbon | GPT-5.4 Pro | Winner |
|-----------|-----------|-----------|--------|
| IPhO 2025 (Theory) | Coming soon | 93.5% | Coming soon |
| FrontierMath (legacy) | Coming soon | 50% | Coming soon |
| FrontierMath v2 (Tiers 1-3) | Coming soon | 82.456% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 58.537% | Coming soon |

## FAQ

### Can I compare Gemini 4 Carbon and GPT-5.4 Pro on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

- [Gemini 4 Carbon vs Gemini 4 Argon](/compare/gemini-4-argon-vs-gemini-4-carbon)
- [GPT-5.4 Pro vs Gemini 4 Argon](/compare/gemini-4-argon-vs-gpt-5-4-pro)
- [Gemini 4 Carbon vs GPT-5.4](/compare/gemini-4-carbon-vs-gpt-5-4)
- [GPT-5.4 Pro vs GPT-5.4](/compare/gpt-5-4-vs-gpt-5-4-pro)

## Explore More

- [Gemini 4 Carbon profile](/models/gemini-4-carbon)
- [GPT-5.4 Pro profile](/models/gpt-5-4-pro)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)