Which model is better: Claude 4.5 Sonnet or Grok 4?
Grok 4 is 16.7% cheaper for input tokens ($2.50 vs. $3.00 per 1M tokens) and $12.50 vs. $15.00 for output tokens (1.2x cost advantage). In terms of operational performance, Claude 4.5 Sonnet delivers lower response latency at 380ms TTFT (100ms faster than Grok 4) with 84 vs. 95 tok/s throughput. Claude 4.5 Sonnet leads coding evaluations at 75.8% SWE-bench Verified vs. 73.2% for Grok 4 and 84.2% vs. 86.2% on GPQA Diamond.
Verified daily via automated API latency tests and official documentation.
Zero-Shot RAG Verified
Verified Performance & Unit Economics Delta (12 Dimensions)
Daily synchronized metrics across token pricing, prompt cache economics, latency, throughput, and 5 capability benchmarks.
Metric / Dimension
Claude 4.5 Sonnet
Grok 4
Net Delta / Advantage
Input Cost / 1M Tokens
$3.00
$2.50
Grok 4 is 1.2x cheaper
Output Cost / 1M Tokens
$15.00
$12.50
Grok 4 (16.7% lower)
Prompt Cache Read / 1M
$0.300
$0.500
Claude 4.5 Sonnet is 1.7x cheaper
Prompt Cache Write / 1M
$3.75
$2.50
Grok 4 is 1.5x cheaper
Context Window (Max Output)
205k (64k out)
262k (66k out)
Grok 4 (1.3x larger context)
Avg TTFT Response Latency
380ms
480ms
Claude 4.5 Sonnet (100ms faster)
Generation Speed (Throughput)
84 tok/s
95 tok/s
Grok 4 (+11 tok/s faster)
SWE-bench Verified (Coding)
75.8%
73.2%
Claude 4.5 Sonnet (+2.6% lead)
GPQA Diamond (PhD STEM)
84.2%
86.2%
Grok 4 (+2.0% lead)
MMLU-Pro (Multi-Discipline)
90.4%
89.9%
Claude 4.5 Sonnet (+0.5% lead)
MATH-500 (Quantitative Logic)
97.5%
97.6%
Grok 4 (+0.1% lead)
Inference Value Score (IVR)
56.5 / 100
57.6 / 100
Grok 4 (+1.1 pts)
Interactive Monthly Token Economics & ROI Forecaster
Model production workloads across prompt, completion, and cached context tokens, or switch models on the fly.
Grok 4 is cheaper at $2.50/1M input tokens ($12.50/1M output) compared to $3.00/1M input ($15.00/1M output) for Claude 4.5 Sonnet.
Which model has lower TTFT latency and higher tok/s throughput: Claude 4.5 Sonnet or Grok 4?
Claude 4.5 Sonnet delivers faster first-token latency at 380ms TTFT (84 tok/s throughput) compared to 480ms TTFT (95 tok/s) for Grok 4.
How do Claude 4.5 Sonnet and Grok 4 compare on SWE-bench coding and GPQA Diamond reasoning?
On SWE-bench Verified software engineering, Claude 4.5 Sonnet scores 75.8% versus 73.2% for Grok 4. On GPQA Diamond graduate-level STEM reasoning, Claude 4.5 Sonnet scores 84.2% versus 86.2% for Grok 4 (and 97.5% vs 97.6% on MATH-500).
When should you choose Claude 4.5 Sonnet?
Choose Claude 4.5 Sonnet (Anthropic) for end-to-end autonomous coding agents, complex multi-file debugging, browser/GUI automation, and high-precision technical writing — offering a 204k context window, 380ms TTFT, and $3.00/1M input pricing ($0.300/1M cached reads).
When should you choose Grok 4?
Choose Grok 4 (xAI) for real-time financial/market intelligence, PhD-level STEM problem solving, and autonomous code generation — offering a 262k context window, 480ms TTFT, and $2.50/1M input pricing ($0.500/1M cached reads).
