Which model is better: Gemini 2.5 Flash or GPT-6 Astra?
Gemini 2.5 Flash is 97.0% cheaper for input tokens ($0.30 vs. $10.00 per 1M tokens) and $2.50 vs. $50.00 for output tokens (33.3x cost advantage). In terms of operational performance, Gemini 2.5 Flash delivers lower response latency at 110ms TTFT (630ms faster than GPT-6 Astra) with 180 vs. 74 tok/s throughput. GPT-6 Astra leads coding evaluations at 75.7% SWE-bench Verified vs. 58.0% for Gemini 2.5 Flash and 96.0% vs. 70.5% 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
Gemini 2.5 Flash
GPT-6 Astra
Net Delta / Advantage
Input Cost / 1M Tokens
$0.30
$10.00
Gemini 2.5 Flash is 33.3x cheaper
Output Cost / 1M Tokens
$2.50
$50.00
Gemini 2.5 Flash (95.0% lower)
Prompt Cache Read / 1M
$0.030
$1.000
Gemini 2.5 Flash is 33.3x cheaper
Prompt Cache Write / 1M
$0.30
$12.50
Gemini 2.5 Flash is 41.7x cheaper
Context Window (Max Output)
1,049k (66k out)
1,075k (128k out)
GPT-6 Astra (1.0x larger context)
Avg TTFT Response Latency
110ms
740ms
Gemini 2.5 Flash (630ms faster)
Generation Speed (Throughput)
180 tok/s
74 tok/s
Gemini 2.5 Flash (+106 tok/s faster)
SWE-bench Verified (Coding)
58%
75.7%
GPT-6 Astra (+17.7% lead)
GPQA Diamond (PhD STEM)
70.5%
96%
GPT-6 Astra (+25.5% lead)
MMLU-Pro (Multi-Discipline)
82%
91.2%
GPT-6 Astra (+9.2% lead)
MATH-500 (Quantitative Logic)
89%
98%
GPT-6 Astra (+9.0% lead)
Inference Value Score (IVR)
66.6 / 100
47.6 / 100
Gemini 2.5 Flash (+19 pts)
Interactive Monthly Token Economics & ROI Forecaster
Model production workloads across prompt, completion, and cached context tokens, or switch models on the fly.
Which is cheaper: Gemini 2.5 Flash or GPT-6 Astra?
Gemini 2.5 Flash is cheaper at $0.30/1M input tokens ($2.50/1M 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: Gemini 2.5 Flash or GPT-6 Astra?
Gemini 2.5 Flash delivers faster first-token latency at 110ms TTFT (180 tok/s throughput) compared to 740ms TTFT (74 tok/s) for GPT-6 Astra.
How do Gemini 2.5 Flash and GPT-6 Astra compare on SWE-bench coding and GPQA Diamond reasoning?
On SWE-bench Verified software engineering, Gemini 2.5 Flash scores 58% versus 75.7% for GPT-6 Astra. On GPQA Diamond graduate-level STEM reasoning, Gemini 2.5 Flash scores 70.5% versus 96% for GPT-6 Astra (and 89% vs 98% on MATH-500).
When should you choose Gemini 2.5 Flash?
Choose Gemini 2.5 Flash (Google) for cost-efficient 1M-context summarization, multimodal extraction, and interactive assistants — offering a 1,048k context window, 110ms TTFT, and $0.30/1M input pricing ($0.030/1M cached reads).
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).
