# Claude 3 Opus vs Claude Sonnet 4.5 Thinking

> Side-by-side benchmark comparison for Claude 3 Opus and Claude Sonnet 4.5 Thinking across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-3-opus-vs-claude-sonnet-4-5-thinking
- Last updated: September 4, 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 Opus and Claude Sonnet 4.5 Thinking.

## Summary

- Claude 3 Opus and Claude Sonnet 4.5 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 Opus | Claude Sonnet 4.5 Thinking |
|----------|----------|----------|
| Creator | Anthropic | Anthropic |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 200K | 200K |
| Independent public score (not head-to-head) | 36.84 | null |
| Benchmarks Covered | 0 | 1 |
| Pricing (input/output) | $15.00 / $75.00 | N/A |

## Category Breakdown

### Coding

- Winner: Insufficient shared evidence
- Claude 3 Opus public-lane score: 35.8 (Estimated · #154/183)
- Claude Sonnet 4.5 Thinking public-lane score: Coming soon

| Benchmark | Claude 3 Opus | Claude Sonnet 4.5 Thinking | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | Coming soon | 22.62% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Claude 3 Opus public-lane score: 34.9 (Estimated · #165/181)
- Claude Sonnet 4.5 Thinking public-lane score: Coming soon

## FAQ

### Can I compare Claude 3 Opus and Claude Sonnet 4.5 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 Opus vs Claude Sonnet 4.5](/compare/claude-3-opus-vs-claude-sonnet-4-5)
- [Claude Sonnet 4.5 Thinking vs Claude Sonnet 4.5](/compare/claude-sonnet-4-5-vs-claude-sonnet-4-5-thinking)
- [Claude 3 Opus vs Claude Fable 5.1](/compare/claude-3-opus-vs-claude-fable-5-1)
- [Claude Sonnet 4.5 Thinking vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-claude-sonnet-4-5-thinking)

## Explore More

- [Claude 3 Opus profile](/models/claude-3-opus)
- [Claude Sonnet 4.5 Thinking profile](/models/claude-sonnet-4-5-thinking)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)