Gemini 3.8 Flash vs GPT-5.6 Luna: pricing, Quality, Value, and benchmarks

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Pricing, app access, and Conversation Value

• Humanity's Last Exam

  Normalized quality input

  47.8%

  Artificial Analysis Gemini 3.8 Flash evaluation | Independent HLE result using the high reasoning configuration on the original HLE evaluation.

• SWE-Bench Pro

  Normalized quality input

  61.6%

  Google DeepMind Gemini 3.8 Flash evaluation methodology | Vendor-reported SWE-Bench Pro result for model ID gemini-3.8-flash with the documented evaluation configuration.

• Terminal-Bench 2.1

  Agentic terminal task completion

  90.8%

  Google Gemini 3.8 Flash developer guide | Vendor-reported Terminal-Bench 2.1 result; supplementary and not a PickAI score input.

Google's newest generally available Flash model improves coding and agentic work while retaining introductory $0.75/$3.75 token pricing through 2026.

Gemini 3.8 Flash combines a 1M-token context window with current HLE and SWE-Bench Pro evidence, multimodal input, and unusually low introductory token prices. Google positions it for software engineering and agentic workflows; the standard $1.50/$7.50 prices begin January 1, 2027.

The fastest, lowest-cost GPT-5.6 option for high-volume workloads.

GPT-5.6 Luna is the fastest and lowest-cost tier in the family. Its accepted HLE and SWE-Bench Pro evidence keep it competitive for high-volume workflows, while difficult tasks should still be tested against Terra or Sol.