Gemini 3.1 Pro 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

  44.4%

  Google DeepMind Gemini 3.1 Pro model card | Vendor-reported Google model-card HLE no-tools score. Do not use Scale AI Thinking High for the primary no-tools leaderboard.

• SWE-Bench Pro

  Software engineering task resolution

  54.2%

  Google DeepMind Gemini 3.1 Pro model card | Vendor-reported Google model-card SWE-Bench Pro (Public) score. Do not substitute SWE-Bench Verified.

• GPQA Diamond

  Normalized quality input

  94.3%

  Google DeepMind Gemini 3.1 Pro comparison table | Vendor-published cross-model comparison table. Treat this as current official evidence, not neutral third-party benchmarking.

• MathArena

  Expected Performance

  64.8%

  MathArena models leaderboard | MathArena is shown as supplementary evidence only and is not currently included in the PickAI Quality Score.

• Humanity's Last Exam

  Normalized quality input

  37.2%

  Artificial Analysis GPT-5.6 Luna max analysis page | Independent Artificial Analysis HLE result for the max-reasoning model variant. This is provisional tier-3 evidence, not an OpenAI-published no-tools HLE result.

• SWE-Bench Pro

  Software engineering task resolution

  62.7%

  OpenAI GPT-5.6 release | Vendor-reported OpenAI GPT-5.6 launch result. Preserve the named tier and launch configuration; do not substitute a similarly named benchmark or model variant.

• GPQA Diamond

  Graduate-level scientific reasoning

  92.3%

  OpenAI GPT-5.6 release | Vendor-reported OpenAI GPT-5.6 launch result. Preserve the named tier and launch configuration; do not substitute a similarly named benchmark or model variant.

• Terminal-Bench 2.1

  Agentic terminal task completion

  84.7%

  OpenAI GPT-5.6 release | Vendor-reported OpenAI GPT-5.6 launch result. Preserve the named tier and launch configuration; do not substitute a similarly named benchmark or model variant.

Choose this when you need the highest reasoning ceiling available and can feed it text, images, audio, or video in the same request.

Gemini 3.1 Pro is the ultimate all-in-one creative partner. It does more than chat; it builds. From generating cinematic video and studio-quality music to managing your life through seamless Google Workspace integration, it turns complex tasks into instant results. It is the fastest, most versatile tool for turning ideas into reality without needing a technical degree. True multimodality means it can create stunning video, professional images, and high-fidelity music in seconds. Its massive context window lets it remember entire books or long documents, so you do not have to repeat yourself. It works inside Gmail, Docs, and Drive to automate daily chores. It also delivers high-level reasoning and instant answers without the lag of older models. If you want an AI that acts as a creative studio, personal assistant, and expert researcher all in one subscription, Gemini 3.1 Pro is the gold standard.

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.