Claude Fable 5.1 vs GPT-4 Turbo
Claude Fable 5.1 leads the LLM Stats Score 54.8 to 9.2. GPT-4 Turbo is 1.3x cheaper per token.
Anthropic · OpenAI · Updated for 2026
Which is better?
Claude Fable 5.1 leads the overall LLM Stats Score 54.8 to 9.2, ranking #5 overall.
On price, GPT-4 Turbo is roughly 1.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Claude Fable 5.1 also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Claude Fable 5.1
- overall performance matters — it scores 54.8 and ranks #5 on LLM Stats
- your work emphasizes reasoning — it leads those capability indexes
- you process long inputs — it offers a 1,000,000 token context window
- you want the most recent training data — it shipped Sep 2026
Choose GPT-4 Turbo
- cost matters — it's about 1.3x cheaper per token
At a glance
The differences that matter most.
Individual benchmarks
7 reported for Claude Fable 5.1 · 6 for GPT-4 Turbo
Claude Fable 5.1 and GPT-4 Turbodon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Claude Fable 5.1 ($10.00/1M tokens) costs the same as GPT-4 Turbo ($10.00/1M tokens).
For output processing, Claude Fable 5.1 ($50.00/1M tokens) is 1.7x more expensive than GPT-4 Turbo ($30.00/1M tokens).
In conclusion, Claude Fable 5.1 is more expensive than GPT-4 Turbo.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Claude Fable 5.1 accepts 1,000,000 input tokens compared to GPT-4 Turbo's 128,000 tokens. Claude Fable 5.1 can generate longer responses up to 128,000 tokens, while GPT-4 Turbo is limited to 4,096 tokens.
Input capabilities
Documented input modalities across available providers
Claude Fable 5.1 supports multimodal inputs, whereas GPT-4 Turbo does not.
Claude Fable 5.1 can handle both text and other forms of data like images, making it suitable for multimodal applications.
Claude Fable 5.1
GPT-4 Turbo
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
Claude Fable 5.1 was released on 2026-09-01, while GPT-4 Turbo was released on 2024-04-09.
Claude Fable 5.1 is 29 months newer than GPT-4 Turbo.
Sep 1, 2026
0 days ago
2.4yr newerApr 9, 2024
2.4 years ago
Knowledge Cutoff
When training data ends
GPT-4 Turbo has a documented knowledge cutoff of 2023-12-31, while Claude Fable 5.1's cutoff date is not specified.
We can confirm GPT-4 Turbo's training data extends to 2023-12-31, but cannot make a direct comparison without Claude Fable 5.1's cutoff date.
—
Dec 2023
Provider Availability
Claude Fable 5.1 is available from Anthropic. GPT-4 Turbo is available from Azure, OpenAI.
Claude Fable 5.1
GPT-4 Turbo
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude Fable 5.1 and GPT-4 Turbo side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude Fable 5.1 vs GPT-4 Turbo.