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Model comparison

Claude Sonnet 4.5 vs Claude Sonnet 4.5 Thinking

Data verified

Head-to-head evidence from 1 shared benchmark result across 1 category. Overall scores shown here use the public BenchAlign v5 ranking lane.

Sibling matchup inside the Claude Sonnet 4.5 family.

53.61/100
No comparison
N/A
0 category wins0 category wins

Public leaderboard positions: Claude Sonnet 4.5 #96 (Estimated); Claude Sonnet 4.5 Thinking unranked (Not scored). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.

Evidence parity. Claude Sonnet 4.5 and Claude Sonnet 4.5 Thinking share 1 comparable benchmark result. 0 of 8 categories are comparable. 11 results are unique to Claude Sonnet 4.5; 1 to Claude Sonnet 4.5 Thinking.

Updated July 23, 2026
Shared results
1
Claude Sonnet 4.5 only
11
Claude Sonnet 4.5 Thinking only
1
Comparable categories
0 / 8

Benchmark data for Claude Sonnet 4.5 and Claude Sonnet 4.5 Thinking is coming soon on BenchLM.

Confidence note. This is a partial-evidence comparison with 1 shared benchmark result across 1 evidence category; 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.

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 scores and score margins for Claude Sonnet 4.5 and Claude Sonnet 4.5 Thinking
CategoryClaude Sonnet 4.5ΔClaude Sonnet 4.5 Thinking
AgenticClaude Sonnet 4.555.4MarginNo overlapClaude Sonnet 4.5 ThinkingNot measured
CodingClaude Sonnet 4.577.2MarginNo overlapClaude Sonnet 4.5 ThinkingNot measured
ReasoningClaude Sonnet 4.513.6MarginNo overlapClaude Sonnet 4.5 ThinkingNot measured
KnowledgeClaude Sonnet 4.583.4MarginNo overlapClaude Sonnet 4.5 ThinkingNot measured
MathClaude Sonnet 4.511.2MarginNo overlapClaude Sonnet 4.5 ThinkingNot measured

Operational comparison

Runtime and commercial metrics are compared only when both models have a complete sourced value.

MetricClaude Sonnet 4.5Claude Sonnet 4.5 ThinkingComparison
Input / output priceUSD per 1M tokensClaude Sonnet 4.5$3 input / $15 outputClaude Sonnet 4.5 ThinkingNot availableA complete price comparison is not available.
Generation speedtokens per secondClaude Sonnet 4.5Not availableClaude Sonnet 4.5 ThinkingNot availableA complete speed comparison is not available.
First-answer latencyseconds to first tokenClaude Sonnet 4.5Not availableClaude Sonnet 4.5 ThinkingNot availableA complete latency comparison is not available.
Context windowmaximum listed tokensClaude Sonnet 4.5200KClaude Sonnet 4.5 Thinking200KListed context windows are equal.

Benchmark Deep Dive

Agentic
BenchmarkClaude Sonnet 4.5Claude Sonnet 4.5 ThinkingResult
Terminal-Bench 2.0Source 50%—Not comparable
OSWorld-VerifiedSource 61.4%—Not comparable
VITA-BenchSource 17.0%—Not comparable
Gert LabsSource 48.51%—Not comparable
JobBenchSource 27.7%—Not comparable
Coding
BenchmarkClaude Sonnet 4.5Claude Sonnet 4.5 ThinkingResult
SWE-bench VerifiedSource 77.2%—Not comparable
Vibe Code BenchSource —22.62%Not comparable
Reasoning
BenchmarkClaude Sonnet 4.5Claude Sonnet 4.5 ThinkingResult
ARC-AGI-2Source 13.6%—Not comparable
Knowledge
BenchmarkClaude Sonnet 4.5Claude Sonnet 4.5 ThinkingResult
GPQASource 83.4%—Not comparable
Math
BenchmarkClaude Sonnet 4.5Claude Sonnet 4.5 ThinkingResult
AIME 2025Source 87%—Not comparable
FrontierMath v2 (Tiers 1-3)Source 13.495%—Not comparable
FrontierMath v2 (Tier 4)Source 4.167%—Not comparable
Multimodal
BenchmarkClaude Sonnet 4.5Claude Sonnet 4.5 ThinkingResult
Design Arena WebsiteSource 12191219Tie
Frequently Asked Questions (3)

Can I compare Claude Sonnet 4.5 and Claude Sonnet 4.5 Thinking 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 Sonnet 4.5 and Claude Sonnet 4.5 Thinking today?

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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Last updated: July 23, 2026

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