Claude 3 Sonnet vs Claude Fable 5.2
Claude Fable 5.2 leads the LLM Stats Score 61.3 to 1.2. Claude 3 Sonnet is 2.7x cheaper per token.
Anthropic · Anthropic · Updated for 2026
Which is better?
Claude Fable 5.2 leads the overall LLM Stats Score 61.3 to 1.2, ranking #1 overall.
On price, Claude 3 Sonnet is roughly 2.7x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Claude Fable 5.2 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 3 Sonnet
- cost matters — it's about 2.7x cheaper per token
Choose Claude Fable 5.2
- overall performance matters — it scores 61.3 and ranks #1 on LLM Stats
- your work emphasizes reasoning and coding — 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 Nov 2026
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
11 reported for Claude 3 Sonnet · 29 for Claude Fable 5.2
Claude 3 Sonnet and Claude Fable 5.2don'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 3 Sonnet ($3.00/1M tokens) is 2.7x cheaper than Claude Fable 5.2 ($8.00/1M tokens).
For output processing, Claude 3 Sonnet ($15.00/1M tokens) is 2.7x cheaper than Claude Fable 5.2 ($40.00/1M tokens).
In conclusion, Claude Fable 5.2 is more expensive than Claude 3 Sonnet.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Claude Fable 5.2 accepts 1,000,000 input tokens compared to Claude 3 Sonnet's 200,000 tokens. Claude 3 Sonnet can generate longer responses up to 200,000 tokens, while Claude Fable 5.2 is limited to 128,000 tokens.
Input capabilities
Documented input modalities across available providers
Both Claude 3 Sonnet and Claude Fable 5.2 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Claude 3 Sonnet
Claude Fable 5.2
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 3 Sonnet was released on 2024-02-29, while Claude Fable 5.2 was released on 2026-11-09.
Claude Fable 5.2 is 33 months newer than Claude 3 Sonnet.
Feb 29, 2024
2.7 years ago
Nov 9, 2026
0 days ago
2.7yr newerKnowledge Cutoff
When training data ends
Claude Fable 5.2 has a documented knowledge cutoff of 2026-06-01, while Claude 3 Sonnet's cutoff date is not specified.
We can confirm Claude Fable 5.2's training data extends to 2026-06-01, but cannot make a direct comparison without Claude 3 Sonnet's cutoff date.
—
Jun 2026
Provider Availability
Claude 3 Sonnet is available from Anthropic, Bedrock, Google. Claude Fable 5.2 is available from Anthropic.
Claude 3 Sonnet
Claude Fable 5.2
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude 3 Sonnet and Claude Fable 5.2 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude 3 Sonnet vs Claude Fable 5.2.