Google Gemini 3.5 Flash VS OpenAI GPT-5.6 Terra
Decision Recommendation
⚖️ Editorial Verdict: In our analysis, GPT-5.6 Terra is the premium intelligence choice, scoring 8.3% higher on coding benchmarks. However, this accuracy premium comes with a cost overhead: Gemini 3.5 Flash is 1.7x cheaper to run. If you are building high-volume, simple chatbots or processing massive amounts of text where budget is critical, Gemini 3.5 Flash offers excellent cost savings. For agentic reasoning, code refactoring, or complex logical tasks, the accuracy premium of GPT-5.6 Terra fully justifies the cost.
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Model Specs
Gemini 3.5 Flash
Benchmarks & Scores
Coding (swe-bench-pro)
55.1%excellent at multi-file repositories, autonomous agents, and industrial codebases
Reasoning (gpqa-diamond)
92.2%graduate-level science QA
Cost & Performance
Cost (per 1M tokens)1.7x cheaper
$3.38Input: $1.50 | Output: $9.00Context Window
1M tokensModel Specs
GPT-5.6 Terra
Benchmarks & Scores
Coding (swe-bench-pro)Winner (+8.3%)
63.4%excellent at multi-file repositories, autonomous agents, and industrial codebases
Reasoning (gpqa-diamond)Winner (+0.7%)
92.9%graduate-level science QA
Cost & Performance
Cost (per 1M tokens)
$5.63Input: $2.50 | Output: $15.00Context WindowLarger
1.05M tokensFrequently Asked Questions about Gemini 3.5 Flash vs GPT-5.6 Terra comparison
Gemini 3.5 Flash is cheaper than GPT-5.6 Terra. Gemini 3.5 Flash has a blended cost of $3.38/1M tokens, which is about 1.7x cheaper than GPT-5.6 Terra at $5.63/1M tokens.
GPT-5.6 Terra is better for coding tasks on this benchmark. It scores 63.4% on swe-bench-pro (excellent at multi-file repositories, autonomous agents, and industrial codebases) compared to Gemini 3.5 Flash which scores 55.1%.
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