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GPT 4.1 vs Claude Fable 5

At a glance

OpenAI's flagship GPT-4.1 with advanced instruction following and long context.

701.0M ctx$2.00/$8.00 per M#55/92

Anthropic's Mythos-class flagship for ambitious, long-running professional work.

921M ctx$10.00/$50.00 per M#2/92
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
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Cheaper83%
Capability
CapabilityECI70.4
Reasoning & Knowledge
Graduate Science66.9%Expert-Level5.4%Factual Recall—
Math
Math Problems83.0%Competition Math38.3%Research Math5.5%
Coding
Real-World Coding48.5%Code Editing52.4%
Agentic
Novel Reasoning0.4%
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Smarter30%
Capability
CapabilityECI30%91.6
Reasoning & Knowledge
Graduate Science—Expert-Level—Factual Recall68.3%
Math
Math Problems—Competition Math160%99.7%Research Math—
Coding
Real-World Coding—Code Editing—
Agentic
Novel Reasoning—
Specs
1.0M
Context
33K
Max output
Apr 2025
Released
1M
Context
128K
Max output
Jun 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input80%$2.00/M tokens
Output84%$8.00/M tokens
Cache read50%$0.50/M tokens
Web search$0.01/search
Live pricing, shown before you run
Input$10.00/M tokens
Output$50.00/M tokens
Cache read$1.00/M tokens
Cache write$12.50/M tokens
Web search$0.01/search
Chat with GPT 4.1Go to model
Chat with Claude Fable 5Go to model
Frequently Asked Questions: GPT 4.1 vs Claude Fable 5▼

Which is better, GPT 4.1 or Claude Fable 5?

▼

Based on the Capability Index, Claude Fable 5 scores higher (91.6 vs 70.4). However, "better" depends on your use case — pricing, speed, context window, and specific capability needs all matter.

Which is cheaper, GPT 4.1 or Claude Fable 5?

▼

GPT 4.1 has a lower blended cost. GPT 4.1: $2.00 input / $8.00 output. Claude Fable 5: $10.00 input / $50.00 output.

Which has a larger context window, GPT 4.1 or Claude Fable 5?

▼

GPT 4.1 has a larger context window: GPT 4.1 supports 1M tokens vs Claude Fable 5 at 1M tokens.

Do both GPT 4.1 and Claude Fable 5 support vision?

▼

Yes, both GPT 4.1 and Claude Fable 5 support vision/image input.

What are the key differences between GPT 4.1 and Claude Fable 5?

▼

Key differences: Claude Fable 5 has a notably higher capability index (21.2 point gap); GPT 4.1 is significantly cheaper; only Claude Fable 5 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 4.1 and Claude Fable 5 for free on idapt.app to see which performs better for your specific needs.

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