Grok 4 is 75.0% cheaper for input tokens ($2.50 vs. $10.00 per 1M tokens) and $12.50 vs. $50.00 for output tokens (4.0x cost advantage). In terms of operational performance, Grok 4 delivers lower response latency at 480ms TTFT (260ms faster than GPT-6 Astra) with 95 vs. 74 tok/s throughput. GPT-6 Astra leads coding evaluations at 75.7% SWE-bench Verified vs. 73.2% for Grok 4 and 96.0% 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
GPT-6 Astra
Grok 4
Net Delta / Advantage
Input Cost / 1M Tokens
$10.00
$2.50
Grok 4 is 4.0x cheaper
Output Cost / 1M Tokens
$50.00
$12.50
Grok 4 (75.0% lower)
Prompt Cache Read / 1M
$1.000
$0.500
Grok 4 is 2.0x cheaper
Prompt Cache Write / 1M
$12.50
$2.50
Grok 4 is 5.0x cheaper
Context Window (Max Output)
1,075k (128k out)
262k (66k out)
GPT-6 Astra (4.1x larger context)
Avg TTFT Response Latency
740ms
480ms
Grok 4 (260ms faster)
Generation Speed (Throughput)
74 tok/s
95 tok/s
Grok 4 (+21 tok/s faster)
SWE-bench Verified (Coding)
75.7%
73.2%
GPT-6 Astra (+2.5% lead)
GPQA Diamond (PhD STEM)
96%
86.2%
GPT-6 Astra (+9.8% lead)
MMLU-Pro (Multi-Discipline)
91.2%
89.9%
GPT-6 Astra (+1.3% lead)
MATH-500 (Quantitative Logic)
98%
97.6%
GPT-6 Astra (+0.4% lead)
Inference Value Score (IVR)
47.6 / 100
57.6 / 100
Grok 4 (+10 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 $10.00/1M input ($50.00/1M output) for GPT-6 Astra.
Which model has lower TTFT latency and higher tok/s throughput: GPT-6 Astra or Grok 4?
Grok 4 delivers faster first-token latency at 480ms TTFT (95 tok/s throughput) compared to 740ms TTFT (74 tok/s) for GPT-6 Astra.
How do GPT-6 Astra and Grok 4 compare on SWE-bench coding and GPQA Diamond reasoning?
On SWE-bench Verified software engineering, GPT-6 Astra scores 75.7% versus 73.2% for Grok 4. On GPQA Diamond graduate-level STEM reasoning, GPT-6 Astra scores 96% versus 86.2% for Grok 4 (and 98% vs 97.6% on MATH-500).
When should you choose GPT-6 Astra?
Choose GPT-6 Astra (OpenAI) for high-autonomy flagship reasoning model engineered for end-to-end computer and browser use, advanced scientific research, and complex multi-turn software engineering — offering a 1,075k context window, 740ms TTFT, and $10.00/1M input pricing ($1.000/1M 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).
