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Gemini 3 Pro vs Claude Fable 5.1

At a glance

Google's flagship model for high-precision multimodal reasoning.

851.0M ctx#14/92

Anthropic's upgraded Mythos-class flagship, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work.

1M ctx$10.00/$50.00 per M
Demos
All demos

No shared demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
Sources:Epoch ECI·Epoch AI· as of 2026-07-10
Capability
CapabilityECI84.8
Reasoning & Knowledge
Graduate Science92.6%Expert-Level37.5%Factual Recall72.9%
Math
Competition Math91.4%Research Math37.6%
Coding
Real-World Coding72.9%
Agentic
Terminal Tasks69.4%Novel Reasoning31.1%Task Horizon3.7h
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Capability
Capability—
Reasoning & Knowledge
Graduate Science—Expert-Level—Factual Recall—
Math
Competition Math—Research Math—
Coding
Real-World Coding—
Agentic
Terminal Tasks—Novel Reasoning—Task Horizon—
Specs
1.0M
Context
66K
Max output
—
Released
1M
Context
128K
Max output
Sep 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Pricing not available
Live pricing, shown before you run
Input$10.00/M tokens
Output$50.00/M tokens
Cache read$0.25/M tokens
Cache write$12.50/M tokens
Web search$0.01/search
Chat with Gemini 3 ProGo to model
Chat with Claude Fable 5.1Go to model
Frequently Asked Questions: Gemini 3 Pro vs Claude Fable 5.1▼

Which is better, Gemini 3 Pro or Claude Fable 5.1?

▼

Both Gemini 3 Pro and Claude Fable 5.1 are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which has a larger context window, Gemini 3 Pro or Claude Fable 5.1?

▼

Gemini 3 Pro has a larger context window: Gemini 3 Pro supports 1M tokens vs Claude Fable 5.1 at 1M tokens.

Do both Gemini 3 Pro and Claude Fable 5.1 support vision?

▼

Yes, both Gemini 3 Pro and Claude Fable 5.1 support vision/image input.

What are the key differences between Gemini 3 Pro and Claude Fable 5.1?

▼

Key differences: only Claude Fable 5.1 offers extended reasoning mode. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Gemini 3 Pro and Claude Fable 5.1 for free on idapt.app to see which performs better for your specific needs.

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