# Claude 3.5 Sonnet vs o3-mini

> Side-by-side benchmark comparison for Claude 3.5 Sonnet and o3-mini across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-3-5-sonnet-vs-o3-mini
- Last updated: September 10, 2026

- Shared sourced benchmarks: 2
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: Claude 3.5 Sonnet and o3-mini share only 2 sourced benchmark rows.

## Summary

- Only 2 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- o3-mini has the lower published output-token price.

## Model Snapshot

| Property | Claude 3.5 Sonnet | o3-mini |
|----------|----------|----------|
| Creator | Anthropic | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 200K | 200K |
| Independent public score (not head-to-head) | 31.96 | 46.83 |
| Benchmarks Covered | 4 | 5 |
| Pricing (input/output) | $3.00 / $15.00 | $1.10 / $4.40 |

## Category Breakdown

### Coding

- Winner: Insufficient shared evidence
- Claude 3.5 Sonnet public-lane score: Coming soon
- o3-mini public-lane score: 45.3 (Estimated · #88/151)

| Benchmark | Claude 3.5 Sonnet | o3-mini | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 49% | 49.3% | o3-mini |

### Knowledge

- Winner: Insufficient shared evidence
- Claude 3.5 Sonnet public-lane score: Coming soon
- o3-mini public-lane score: 39.7 (Supported · #134/183)

| Benchmark | Claude 3.5 Sonnet | o3-mini | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 59.4% | 77.2% | o3-mini |
| MMLU | Coming soon | 86.9% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Claude 3.5 Sonnet public-lane score: Coming soon
- o3-mini public-lane score: Coming soon

| Benchmark | Claude 3.5 Sonnet | o3-mini | Winner |
|-----------|-----------|-----------|--------|
| IFEval | Coming soon | 93.9% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Claude 3.5 Sonnet public-lane score: 25.7 (Unranked · 2 rankable rows)
- o3-mini public-lane score: Coming soon

| Benchmark | Claude 3.5 Sonnet | o3-mini | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 2.069% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 0.000% | Coming soon | Coming soon |
| AIME 2024 | Coming soon | 87.3% | Coming soon |

## FAQ

### Is there enough evidence to pick between Claude 3.5 Sonnet and o3-mini?

Not yet. The models share only 2 sourced benchmark rows, 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 o3](/compare/claude-3-5-sonnet-vs-o3)
- [o3-mini vs o3](/compare/o3-vs-o3-mini)
- [Claude 3.5 Sonnet vs o3-pro](/compare/claude-3-5-sonnet-vs-o3-pro)
- [o3-mini vs o3-pro](/compare/o3-mini-vs-o3-pro)

## Explore More

- [Claude 3.5 Sonnet profile](/models/claude-3-5-sonnet)
- [o3-mini profile](/models/o3-mini)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)