Skip to main content
BenchLM
Advertise

Model comparison

Claude Sonnet 4.5 vs Grok 3 [Beta]

Data verified

Head-to-head evidence from 2 shared benchmark results across 1 category. Overall scores shown here use the public BenchAlign v5 ranking lane.

53.61/100
Margin
13.2pts
← winning
40.43/100
1 category wins0 category wins

Public leaderboard positions: Claude Sonnet 4.5 #96 (Estimated); Grok 3 [Beta] #171 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.

Evidence parity. Claude Sonnet 4.5 and Grok 3 [Beta] share 2 comparable benchmark results. 1 of 8 categories are comparable. 10 results are unique to Claude Sonnet 4.5; 0 to Grok 3 [Beta].

Updated July 20, 2026
Shared results
2
Claude Sonnet 4.5 only
10
Grok 3 [Beta] only
0
Comparable categories
1 / 8

Pick Claude Sonnet 4.5 if you want the stronger benchmark profile. Grok 3 [Beta] only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.

Confidence note. This is a partial-evidence comparison with 2 shared benchmark results 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 Sonnet 4.5 is clearly ahead on the BenchAlign aggregate, 53.61 to 40.43. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

Claude Sonnet 4.5's sharpest advantage is in mathematics, where it averages 11.2 against 2.8. The single biggest benchmark swing on the page is FrontierMath v2 (Tiers 1-3), 13.495% to 3.793%.

Claude Sonnet 4.5 gives you the larger context window at 200K, compared with 128K for Grok 3 [Beta].

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 Grok 3 [Beta]
CategoryClaude Sonnet 4.5ΔGrok 3 [Beta]
MathClaude Sonnet 4.511.2Margin← 8.4Grok 3 [Beta]2.8
AgenticClaude Sonnet 4.555.4MarginNo overlapGrok 3 [Beta]Not measured
CodingClaude Sonnet 4.577.2MarginNo overlapGrok 3 [Beta]Not measured
ReasoningClaude Sonnet 4.513.6MarginNo overlapGrok 3 [Beta]Not measured
KnowledgeClaude Sonnet 4.583.4MarginNo overlapGrok 3 [Beta]Not measured

Decisive benchmark drivers

The largest measured benchmark gaps in this matchup, with exact reported values.

More
A · Claude Sonnet 4.5B · Grok 3 [Beta]

  1. FrontierMath v2 (Tiers 1-3)

    Math
    Source ↗
    A 13.495%B 3.793%
    Winner: Claude Sonnet 4.5Δ 9.7
    FrontierMath v2 (Tiers 1-3): Claude Sonnet 4.5 scored 13.495%; Grok 3 [Beta] scored 3.793%. Claude Sonnet 4.5 wins this benchmark.

  2. FrontierMath v2 (Tier 4)

    Math
    Source ↗
    A 4.167%B 0.000%
    Winner: Claude Sonnet 4.5Δ 4.2
    FrontierMath v2 (Tier 4): Claude Sonnet 4.5 scored 4.167%; Grok 3 [Beta] scored 0.000%. Claude Sonnet 4.5 wins this benchmark.

Operational comparison

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

MetricClaude Sonnet 4.5Grok 3 [Beta]Comparison
Input / output priceUSD per 1M tokensClaude Sonnet 4.5$3 input / $15 outputGrok 3 [Beta]Not availableA complete price comparison is not available.
Generation speedtokens per secondClaude Sonnet 4.5Not availableGrok 3 [Beta]Not availableA complete speed comparison is not available.
First-answer latencyseconds to first tokenClaude Sonnet 4.5Not availableGrok 3 [Beta]Not availableA complete latency comparison is not available.
Context windowmaximum listed tokensClaude Sonnet 4.5200KGrok 3 [Beta]128KClaude Sonnet 4.5 lists the larger context window.

Benchmark Deep Dive

Agentic
BenchmarkClaude Sonnet 4.5Grok 3 [Beta]Result
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 4.5Grok 3 [Beta]Result
SWE-bench VerifiedSource 77.2%—Not comparable
Reasoning
BenchmarkClaude Sonnet 4.5Grok 3 [Beta]Result
ARC-AGI-2Source 13.6%—Not comparable
Knowledge
BenchmarkClaude Sonnet 4.5Grok 3 [Beta]Result
GPQASource 83.4%—Not comparable
MathClaude Sonnet 4.5 wins
BenchmarkClaude Sonnet 4.5Grok 3 [Beta]Result
AIME 2025Source 87%—Not comparable
FrontierMath v2 (Tiers 1-3)Source 13.495%3.793%Claude Sonnet 4.5 leads
FrontierMath v2 (Tier 4)Source 4.167%0.000%Claude Sonnet 4.5 leads
Multimodal
BenchmarkClaude Sonnet 4.5Grok 3 [Beta]Result
Design Arena WebsiteSource 1222—Not comparable
Frequently Asked Questions (2)

Which is better, Claude Sonnet 4.5 or Grok 3 [Beta]?

Claude Sonnet 4.5 is ahead on BenchLM's BenchAlign leaderboard, 53.61 to 40.43. The biggest single separator in this matchup is FrontierMath v2 (Tiers 1-3), where the scores are 13.495% and 3.793%.

Which is better for math, Claude Sonnet 4.5 or Grok 3 [Beta]?

Claude Sonnet 4.5 has the edge for math in this comparison, averaging 11.2 versus 2.8. Inside this category, FrontierMath v2 (Tiers 1-3) is the benchmark that creates the most daylight between them.

Related Comparisons

Explore More

Anthropic Compare Pricing Methodology Find Your Best LLM Overall Rankings
Last updated: July 20, 2026

Choose a model with this week’s evidence

Join 2,000+ readers for ranking moves, pricing changes, and the claims that still need proof.

One email each week. Unsubscribe anytime.