# Gemini 4 Carbon vs Grok 4.3

> Side-by-side benchmark comparison for Gemini 4 Carbon and Grok 4.3 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemini-4-carbon-vs-grok-4-3
- 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 Grok 4.3.

## Summary

- Gemini 4 Carbon and Grok 4.3 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 | Grok 4.3 |
|----------|----------|----------|
| Creator | Google | xAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | null | 1M |
| Independent public score (not head-to-head) | 88.42 | 52.7 |
| Benchmarks Covered | 9 | 9 |
| Pricing (input/output) | $2.00 / $10.00 | $1.25 / $2.50 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Gemini 4 Carbon public-lane score: Coming soon
- Grok 4.3 public-lane score: 28.4 (Supported · #112/134)

| Benchmark | Gemini 4 Carbon | Grok 4.3 | 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 |
| Gert Labs | Coming soon | 43.86% | Coming soon |
| ResearchClawBench | Coming soon | 12.4% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 41.9% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Gemini 4 Carbon public-lane score: 82.2 (Supported · #3/156)
- Grok 4.3 public-lane score: 26.9 (Supported · #116/156)

| Benchmark | Gemini 4 Carbon | Grok 4.3 | Winner |
|-----------|-----------|-----------|--------|
| FrontierSWE v2 | 61.2% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 84.5% | Coming soon |
| SWE-bench (Vals) | Coming soon | 71.4% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Gemini 4 Carbon public-lane score: 79.5 (Unranked · 2 rankable rows)
- Grok 4.3 public-lane score: 69.2 (Unranked · 2 rankable rows)

| Benchmark | Gemini 4 Carbon | Grok 4.3 | Winner |
|-----------|-----------|-----------|--------|
| GraphWalks BFS 256K–1M | 96.2% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Gemini 4 Carbon public-lane score: Coming soon
- Grok 4.3 public-lane score: 79.2 (#23/58)

| Benchmark | Gemini 4 Carbon | Grok 4.3 | 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)
- Grok 4.3 public-lane score: 53.8 (Supported · #63/178)

| Benchmark | Gemini 4 Carbon | Grok 4.3 | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | Coming soon | 91.4% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 85.8% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Gemini 4 Carbon public-lane score: Coming soon
- Grok 4.3 public-lane score: 97.1 (#1/157)

| Benchmark | Gemini 4 Carbon | Grok 4.3 | 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
- Grok 4.3 public-lane score: 51.4 (Unranked · 2 rankable rows)

| Benchmark | Gemini 4 Carbon | Grok 4.3 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | Coming soon | 42.807% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 14.634% | Coming soon |

## FAQ

### Can I compare Gemini 4 Carbon and Grok 4.3 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)
- [Grok 4.3 vs Gemini 4 Argon](/compare/gemini-4-argon-vs-grok-4-3)
- [Gemini 4 Carbon vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-gemini-4-carbon)
- [Grok 4.3 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-grok-4-3)

## Explore More

- [Gemini 4 Carbon profile](/models/gemini-4-carbon)
- [Grok 4.3 profile](/models/grok-4-3)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)