Model comparison
Claude 3 Opus vs Claude Sonnet 4.5
Head-to-head evidence from 0 shared benchmark results across 0 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Claude 3 Opus #168 (Supported); Claude Sonnet 4.5 #96 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude 3 Opus and Claude Sonnet 4.5 share 0 comparable benchmark results. 0 of 8 categories are comparable. 5 results are unique to Claude 3 Opus; 12 to Claude Sonnet 4.5.
Updated July 22, 2026- Shared results
- 0
- Claude 3 Opus only
- 5
- Claude Sonnet 4.5 only
- 12
- Comparable categories
- 0 / 8
Benchmark data for Claude 3 Opus and Claude Sonnet 4.5 is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 0 shared benchmark results across 0 evidence categories; 0 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
BenchLM has partial data for these models, but not enough overlapping benchmark coverage to produce a fair score-level comparison yet.
Claude 3 Opus is priced at $15.00 input / $75.00 output per 1M tokens, versus $3.00 input / $15.00 output per 1M tokens for Claude Sonnet 4.5.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude 3 Opus | Claude Sonnet 4.5 | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude 3 Opus$15 input / $75 output | Claude Sonnet 4.5$3 input / $15 output | Claude Sonnet 4.5 has the lower combined listed price. |
| Generation speedtokens per second | Claude 3 OpusNot available | Claude Sonnet 4.5Not available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude 3 OpusNot available | Claude Sonnet 4.5Not available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude 3 Opus200K | Claude Sonnet 4.5200K | Listed context windows are equal. |
Benchmark Deep Dive
Frequently Asked Questions (3)
Can I compare Claude 3 Opus and Claude Sonnet 4.5 on BenchLM yet?
Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.
Why does this comparison show “coming soon”?
BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.
What data is available for Claude 3 Opus and Claude Sonnet 4.5 today?
Claude 3 Opus: $15.00 input / $75.00 output per 1M tokens Claude Sonnet 4.5: $3.00 input / $15.00 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.
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