Which is better: Claude Sonnet 5.5 or Grok 4.5?

Verdict: Claude Sonnet 5.5 ranks higher (#6 vs #22) and wins 5 of 6 shared benchmarks; Grok 4.5 costs less ($2.00/$6.00 vs $2.00/$10.0 per 1M tokens). AskClash compares Claude Sonnet 5.5 and Grok 4.5 side by side across SWE-bench, GPQA, HLE, Terminal-Bench, coding agent scores, token pricing, AskClash ACB, and context window so you can see which model wins on each benchmark.

How do Claude Sonnet 5.5 and Grok 4.5 compare on coding benchmarks?

The comparison table shows SWE-bench, SWE-Pro, SWE-Atlas, Terminal-Bench, DeepSWE, and coding agent index scores for both Claude Sonnet 5.5 and Grok 4.5 when publicly disclosed.

LLM Comparison

Claude Sonnet 5.5 vs Grok 4.5: benchmark scores, pricing & comparison.

Side-by-side Claude Sonnet 5.5 vs Grok 4.5 comparison across SWE-bench, GPQA, HLE, Terminal-Bench, coding agent scores, token pricing, context window, and AskClash RWT. Green marks the winner on each benchmark.

Verdict: Claude Sonnet 5.5 ranks higher (#6 vs #22) and wins 5 of 6 shared benchmarks; Grok 4.5 costs less ($2.00/$6.00 vs $2.00/$10.0 per 1M tokens).

Open live leaderboard Claude Sonnet 5.5 model page Grok 4.5 model page

Rank #6 vs #22AskClash overall scores 73.7 vs 61.4.

Pricing $2.00/$10.0 vs $2.00/$6.00Input and output token prices per 1M tokens when published.

Proprietary vs ProprietaryAnthropic vs xAI.

Claude Sonnet 5.5 vs Grok 4.5 benchmark comparison

Green cells highlight the winning model for each metric. Scores are cached from the AskClash LLM leaderboard snapshot.

Metric	Claude Sonnet 5.5	Grok 4.5
Overall Score	73.7	61.4
Leaderboard Rank	#6	#22
ACB	76.6	57.6
RWT	—	9.0
Coding Agent Index	—	76.4
HLE	64.5	40.3
GPQA	—	93.1
SWE-Pro	81.3	64.7
SWE-Atlas	—	83.9
Terminal-Bench	83.2	83.3
DeepSWE	71.0	—
GDPval-AA	1844.2	1542.8
Finance Agent	58.1	48.3
MMMU-Pro	—	80.4
ARC-AGI 2	—	52.6
Input Price (per 1M tokens)	$2.00	$2.00
Output Price (per 1M tokens)	$10.0	$6.00
Context Window	1M	500K
Benchmarks Published	10	14

Claude Sonnet 5.5 vs Grok 4.5 head-to-head charts

Claude Sonnet 5.5 leads 6 and Grok 4.5 leads 1 of 7 shared benchmarks. Grok 4.5 is cheaper on a defined 1M-input / 200K-output workload. Charts show only benchmarks both models publish.

Claude Sonnet 5.5Grok 4.5

Overall

73.7Claude Sonnet 5.5

61.4Grok 4.5

ACB

76.6Claude Sonnet 5.5

57.6Grok 4.5

HLE

64.5Claude Sonnet 5.5

40.3Grok 4.5

SWE-Pro

81.3Claude Sonnet 5.5

64.7Grok 4.5

Terminal-Bench

83.2Claude Sonnet 5.5

83.3Grok 4.5

GDPval-AA

1844.2Claude Sonnet 5.5

1542.8Grok 4.5

Finance Agent

58.1Claude Sonnet 5.5

48.3Grok 4.5

Claude Sonnet 5.5

Input$2.00

Output$10.0

Workload$4.00

Context1M

Grok 4.5

Input$2.00

Output$6.00

Workload$3.20

Context500K

Workload = published cost of 1M input + 200K output tokens. Open the live leaderboard for interactive compare charts.

More Claude Sonnet 5.5 and Grok 4.5 comparisons

Explore how Claude Sonnet 5.5 and Grok 4.5 stack up against other top-ranked LLMs.

Claude Fable 5.1 vs Claude Sonnet 5.5 Claude Fable 5.1 vs Grok 4.5 Claude Opus 5.5 vs Claude Sonnet 5.5 Claude Opus 5.5 vs Grok 4.5 Claude Fable 5 vs Claude Sonnet 5.5 Claude Fable 5 vs Grok 4.5 Claude Opus 5 vs Claude Sonnet 5.5 Claude Opus 5 vs Grok 4.5 GPT-5.6 Sol vs Claude Sonnet 5.5 GPT-5.6 Sol vs Grok 4.5

How to read this comparison

Benchmark scores

Higher is better for all benchmark scores (SWE-bench, GPQA, HLE, Terminal-Bench, etc.). Green marks the model with the higher score.

Token pricing

Lower is better for input and output prices. Green marks the cheaper model per 1M tokens.

Coverage matters

Models with fewer disclosed benchmark cells may have inflated percentile scores. Check the benchmark cell count for context.

This comparison page is generated from the AskClash LLM leaderboard cache. Open the live leaderboard for real-time scores and interactive filtering.