# Claude 3.5 Sonnet vs Claude 4.1 Opus

> Side-by-side benchmark comparison for Claude 3.5 Sonnet and Claude 4.1 Opus across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-3-5-sonnet-vs-claude-4-1-opus
- Last updated: September 21, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: Claude 3.5 Sonnet and Claude 4.1 Opus share only 1 sourced benchmark row.

## Summary

- Only 1 shared sourced benchmark row is available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Claude 3.5 Sonnet has the lower published output-token price.

## Model Snapshot

| Property | Claude 3.5 Sonnet | Claude 4.1 Opus |
|----------|----------|----------|
| Creator | Anthropic | Anthropic |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Non-Reasoning |
| Context | 200K | 200K |
| Independent public score (not head-to-head) | 32.41 | 42.1 |
| Benchmarks Covered | 4 | 2 |
| Pricing (input/output) | $3.00 / $15.00 | $15.00 / $75.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Claude 3.5 Sonnet public-lane score: Coming soon
- Claude 4.1 Opus public-lane score: 43.1 (Estimated · #105/154)

| Benchmark | Claude 3.5 Sonnet | Claude 4.1 Opus | Winner |
|-----------|-----------|-----------|--------|
| JobBench | Coming soon | 21.9% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude 3.5 Sonnet public-lane score: Coming soon
- Claude 4.1 Opus public-lane score: 43.2 (Estimated · #107/156)

| Benchmark | Claude 3.5 Sonnet | Claude 4.1 Opus | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 49% | 74.5% | Claude 4.1 Opus |

### Knowledge

- Winner: Insufficient shared evidence
- Claude 3.5 Sonnet public-lane score: Coming soon
- Claude 4.1 Opus public-lane score: Coming soon

| Benchmark | Claude 3.5 Sonnet | Claude 4.1 Opus | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 59.4% | Coming soon | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Claude 3.5 Sonnet public-lane score: 25.6 (Unranked · 2 rankable rows)
- Claude 4.1 Opus public-lane score: Coming soon

| Benchmark | Claude 3.5 Sonnet | Claude 4.1 Opus | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 2.069% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 0.000% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between Claude 3.5 Sonnet and Claude 4.1 Opus?

Not yet. The models share only 1 sourced benchmark row, 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

- [Claude 3.5 Sonnet vs Claude 4.1 Opus Thinking](/compare/claude-3-5-sonnet-vs-claude-4-1-opus-thinking)
- [Claude 4.1 Opus vs Claude 4.1 Opus Thinking](/compare/claude-4-1-opus-vs-claude-4-1-opus-thinking)
- [Claude 3.5 Sonnet vs Claude Fable 5.1](/compare/claude-3-5-sonnet-vs-claude-fable-5-1)
- [Claude 4.1 Opus vs Claude Fable 5.1](/compare/claude-4-1-opus-vs-claude-fable-5-1)

## Explore More

- [Claude 3.5 Sonnet profile](/models/claude-3-5-sonnet)
- [Claude 4.1 Opus profile](/models/claude-4-1-opus)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)