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GPT 4o Mini vs Claude Fable 5.1

At a glance

OpenAI's most advanced small model — fast and affordable.

61128K ctx$0.15/$0.60 per M#69/92

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
CodingInsufficient data
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Cheaper99%
Capability
CapabilityECI60.8
Reasoning & Knowledge
Graduate Science37.7%
Math
Math Problems52.6%Competition Math6.9%
Coding
Code Editing3.6%
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Capability
Capability—
Reasoning & Knowledge
Graduate Science—
Math
Math Problems—Competition Math—
Coding
Code Editing—
Specs
128K
Context
16K
Max output
Jul 2024
Released
1M
Context
128K
Max output
Sep 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input99%$0.15/M tokens
Output99%$0.60/M tokens
Cache read70%$0.07/M tokens
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 GPT 4o MiniGo to model
Chat with Claude Fable 5.1Go to model
Frequently Asked Questions: GPT 4o Mini vs Claude Fable 5.1▼

Which is better, GPT 4o Mini or Claude Fable 5.1?

▼

Both GPT 4o Mini 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 is cheaper, GPT 4o Mini or Claude Fable 5.1?

▼

GPT 4o Mini has a lower blended cost. GPT 4o Mini: $0.15 input / $0.60 output. Claude Fable 5.1: $10.00 input / $50.00 output.

Which has a larger context window, GPT 4o Mini or Claude Fable 5.1?

▼

Claude Fable 5.1 has a larger context window: GPT 4o Mini supports 128K tokens vs Claude Fable 5.1 at 1M tokens.

Do both GPT 4o Mini and Claude Fable 5.1 support vision?

▼

Yes, both GPT 4o Mini and Claude Fable 5.1 support vision/image input.

What are the key differences between GPT 4o Mini and Claude Fable 5.1?

▼

Key differences: GPT 4o Mini is significantly cheaper; 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 GPT 4o Mini and Claude Fable 5.1 for free on idapt.app to see which performs better for your specific needs.

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