# Claude Sonnet 4.5 vs Gemini 4 Carbon

> Side-by-side benchmark comparison for Claude Sonnet 4.5 and Gemini 4 Carbon across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-sonnet-4-5-vs-gemini-4-carbon
- 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 Claude Sonnet 4.5 and Gemini 4 Carbon.

## Summary

- Claude Sonnet 4.5 and Gemini 4 Carbon 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 | Claude Sonnet 4.5 | Gemini 4 Carbon |
|----------|----------|----------|
| Creator | Anthropic | Google |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 200K | null |
| Independent public score (not head-to-head) | 47.23 | 88.42 |
| Benchmarks Covered | 12 | 9 |
| Pricing (input/output) | $3.00 / $15.00 | $2.00 / $10.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Claude Sonnet 4.5 public-lane score: 36 (Estimated · #86/134)
- Gemini 4 Carbon public-lane score: Coming soon

| Benchmark | Claude Sonnet 4.5 | Gemini 4 Carbon | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 50% | Coming soon | Coming soon |
| OSWorld-Verified | 61.4% | Coming soon | Coming soon |
| VITA-Bench | 17.0% | Coming soon | Coming soon |
| Gert Labs | 48.51% | Coming soon | Coming soon |
| JobBench | 27.7% | Coming soon | Coming soon |
| AutomationBench | Coming soon | 53.9% | Coming soon |
| OSWorld 2.1 Offline | Coming soon | 81.5% | Coming soon |
| CWE-bench v1 | Coming soon | 71.0% | Coming soon |
| ExploitGym | Coming soon | 53.5% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude Sonnet 4.5 public-lane score: Coming soon
- Gemini 4 Carbon public-lane score: 82.2 (Supported · #3/156)

| Benchmark | Claude Sonnet 4.5 | Gemini 4 Carbon | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 77.2% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 50.0% | Coming soon | Coming soon |
| FrontierSWE v2 | Coming soon | 61.2% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Claude Sonnet 4.5 public-lane score: 22.9 (Unranked · 1 rankable row)
- Gemini 4 Carbon public-lane score: 79.5 (Unranked · 2 rankable rows)

| Benchmark | Claude Sonnet 4.5 | Gemini 4 Carbon | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 13.6% | Coming soon | Coming soon |
| GraphWalks BFS 256K–1M | Coming soon | 96.2% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude Sonnet 4.5 public-lane score: Coming soon
- Gemini 4 Carbon public-lane score: Coming soon

| Benchmark | Claude Sonnet 4.5 | Gemini 4 Carbon | Winner |
|-----------|-----------|-----------|--------|
| Chartography (no tools) | Coming soon | 72.5% | Coming soon |
| Blueprint-Bench 2 | Coming soon | 58.6% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Claude Sonnet 4.5 public-lane score: Coming soon
- Gemini 4 Carbon public-lane score: 88.2 (Supported · #2/178)

| Benchmark | Claude Sonnet 4.5 | Gemini 4 Carbon | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 83.4% | Coming soon | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Claude Sonnet 4.5 public-lane score: Coming soon
- Gemini 4 Carbon public-lane score: Coming soon

| Benchmark | Claude Sonnet 4.5 | Gemini 4 Carbon | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | Coming soon | 0.0% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Claude Sonnet 4.5 public-lane score: 36.4 (Unranked · 2 rankable rows)
- Gemini 4 Carbon public-lane score: Coming soon

| Benchmark | Claude Sonnet 4.5 | Gemini 4 Carbon | Winner |
|-----------|-----------|-----------|--------|
| AIME 2025 | 87% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 23.860% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 2.439% | Coming soon | Coming soon |

## FAQ

### Can I compare Claude Sonnet 4.5 and Gemini 4 Carbon 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

- [Claude Sonnet 4.5 vs Claude Sonnet 4.5 Thinking](/compare/claude-sonnet-4-5-vs-claude-sonnet-4-5-thinking)
- [Gemini 4 Carbon vs Claude Sonnet 4.5 Thinking](/compare/claude-sonnet-4-5-thinking-vs-gemini-4-carbon)
- [Claude Sonnet 4.5 vs Gemini 4 Argon](/compare/claude-sonnet-4-5-vs-gemini-4-argon)
- [Gemini 4 Carbon vs Gemini 4 Argon](/compare/gemini-4-argon-vs-gemini-4-carbon)

## Explore More

- [Claude Sonnet 4.5 profile](/models/claude-sonnet-4-5)
- [Gemini 4 Carbon profile](/models/gemini-4-carbon)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)