Claude Fable 5.1 vs Gemini 3.1 Pro: pricing, Quality, Value, and benchmarks

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Pricing, app access, and Conversation Value

• Humanity's Last Exam

  Normalized quality input

  59.1%

  Artificial Analysis Claude Fable 5.1 evaluation | Independent HLE result using adaptive reasoning at maximum effort with Anthropic default safeguard fallback.

• SWE-Bench Pro

  Normalized quality input

  81.2%

  Anthropic Claude Fable 5.1 and Mythos 5.1 system card | Vendor-reported SWE-Bench Pro result using adaptive thinking at maximum effort and default sampling settings.

• Terminal-Bench 2.1

  Agentic terminal task completion

  91.4%

  Artificial Analysis Claude Fable 5.1 analysis | Independent Terminal-Bench 2.1 result using adaptive reasoning at maximum effort with default safeguard fallback.

• GPQA Diamond

  Normalized quality input

Anthropic's newest generally available Fable model leads the current scored evidence, with premium $10/$50 token pricing and safeguard fallback for some flagged requests.

Claude Fable 5.1 combines the strongest current locked-variant HLE and SWE-Bench Pro evidence with a 1M-token context window. Its $10 per million input-token and $50 per million output-token prices make it a specialist choice for difficult coding and knowledge work, while safeguard fallback means integrations should surface the model identity returned by the API.

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.