Model comparison
Claude 3.5 Sonnet vs o1-pro
Head-to-head evidence from 1 shared benchmark result across 1 category. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Claude 3.5 Sonnet #139 (Estimated); o1-pro #148 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude 3.5 Sonnet and o1-pro share 1 comparable benchmark result. 1 of 8 categories are comparable. 3 results are unique to Claude 3.5 Sonnet; 1 to o1-pro.
Updated July 24, 2026- Shared results
- 1
- Claude 3.5 Sonnet only
- 3
- o1-pro only
- 1
- Comparable categories
- 1 / 8
Pick Claude 3.5 Sonnet if you want the stronger benchmark profile. o1-pro only becomes the better choice if knowledge is the priority or you want the stronger reasoning-first profile.
Confidence note. This is a partial-evidence comparison with 1 shared benchmark result across 1 evidence category; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Claude 3.5 Sonnet has the cleaner BenchAlign overall profile here, landing at 46.96 versus 45.03. It is a real lead, but still close enough that category-level strengths matter more than the headline number.
o1-pro is also the more expensive model on tokens at $150.00 input / $600.00 output per 1M tokens, versus $3.00 input / $15.00 output per 1M tokens for Claude 3.5 Sonnet. That is roughly 40.0x on output cost alone. o1-pro is the reasoning model in the pair, while Claude 3.5 Sonnet is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | Claude 3.5 Sonnet | Δ | o1-pro |
|---|---|---|---|
| Knowledge | Claude 3.5 Sonnet59.4 | Margin→ 19.6 | o1-pro79.0 |
| Coding | Claude 3.5 Sonnet49.0 | MarginNo overlap | o1-proNot measured |
| Math | Claude 3.5 Sonnet1.6 | MarginNo overlap | o1-proNot measured |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
GPQA
KnowledgeA 59.4%B 79%Winner: o1-proΔ 19.6GPQA: Claude 3.5 Sonnet scored 59.4%; o1-pro scored 79%. o1-pro wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude 3.5 Sonnet | o1-pro | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude 3.5 Sonnet$3 input / $15 output | o1-pro$150 input / $600 output | Claude 3.5 Sonnet has the lower combined listed price. |
| Generation speedtokens per second | Claude 3.5 SonnetNot available | o1-proNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude 3.5 SonnetNot available | o1-proNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude 3.5 Sonnet200K | o1-pro200K | Listed context windows are equal. |
Benchmark Deep Dive
Coding1 benchmarks
| Benchmark | Claude 3.5 Sonnet | o1-pro | Result |
|---|---|---|---|
| SWE-bench VerifiedSource | 49% | — | Not comparable |
Knowledgeo1-pro wins2 benchmarks
Frequently Asked Questions (2)
Which is better, Claude 3.5 Sonnet or o1-pro?
Claude 3.5 Sonnet is ahead on BenchLM's BenchAlign leaderboard, 46.96 to 45.03. The biggest single separator in this matchup is GPQA, where the scores are 59.4% and 79%.
Which is better for knowledge tasks, Claude 3.5 Sonnet or o1-pro?
o1-pro has the edge for knowledge tasks in this comparison, averaging 79 versus 59.4. Inside this category, GPQA is the benchmark that creates the most daylight between them.