# Claude 3.5 Sonnet vs Claude 4.1 Opus Thinking

> Side-by-side benchmark comparison for Claude 3.5 Sonnet and Claude 4.1 Opus Thinking 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-thinking
- Last updated: September 10, 2026

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

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Claude 3.5 Sonnet and Claude 4.1 Opus Thinking.

## Summary

- Claude 3.5 Sonnet and Claude 4.1 Opus Thinking 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 3.5 Sonnet | Claude 4.1 Opus Thinking |
|----------|----------|----------|
| Creator | Anthropic | Anthropic |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 200K | 200K |
| Independent public score (not head-to-head) | 31.96 | 31.61 |
| Benchmarks Covered | 4 | 0 |
| Pricing (input/output) | $3.00 / $15.00 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Coding

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

| Benchmark | Claude 3.5 Sonnet | Claude 4.1 Opus Thinking | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 49% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude 3.5 Sonnet public-lane score: Coming soon
- Claude 4.1 Opus Thinking public-lane score: 60 (Unranked · 1 rankable row)

### Reasoning

- Winner: Insufficient shared evidence
- Claude 3.5 Sonnet public-lane score: Coming soon
- Claude 4.1 Opus Thinking public-lane score: 73.2 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Insufficient shared evidence
- Claude 3.5 Sonnet public-lane score: Coming soon
- Claude 4.1 Opus Thinking public-lane score: 36 (Estimated · #154/183)

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

### Instruction Following

- Winner: Insufficient shared evidence
- Claude 3.5 Sonnet public-lane score: Coming soon
- Claude 4.1 Opus Thinking public-lane score: 66.6 (#67/123)

### Mathematics

- Winner: Insufficient shared evidence
- Claude 3.5 Sonnet public-lane score: 25.7 (Unranked · 2 rankable rows)
- Claude 4.1 Opus Thinking public-lane score: Coming soon

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

## FAQ

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

## Explore More

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