Claude Fable 5.2 vs Claude Mythos Preview
Claude Fable 5.2 leads the LLM Stats Score 61.1 to 53.8. Claude Fable 5.2 is 3.1x cheaper per token.
Anthropic · Anthropic · Updated for 2026
Which is better?
Claude Fable 5.2 leads the overall LLM Stats Score 61.1 to 53.8, ranking #1 overall.
In the 4 individual benchmarks reported for both models, Claude Fable 5.2 wins 4; this is a narrower head-to-head signal than the composite indexes.
On price, Claude Fable 5.2 is roughly 3.1x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Claude Fable 5.2
- overall performance matters — it scores 61.1 and ranks #1 on LLM Stats
- your work emphasizes agents — it leads those capability indexes
- you value its reported benchmark strengths — it wins 4 of 4 exact shared results
- cost matters — it's about 3.1x cheaper per token
Choose Claude Mythos Preview
- you want predictable pricing at $25.00/M input and $125.00/M output
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
29 reported for Claude Fable 5.2 · 16 for Claude Mythos Preview
Claude Fable 5.2 outperforms in 4 benchmarks (Humanity's Last Exam, SWE-bench Multilingual, SWE-Bench Multimodal, SWE-Bench Pro), while Claude Mythos Preview is better at 0 benchmarks.
Claude Fable 5.2 significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Claude Fable 5.2 ($8.00/1M tokens) is 3.1x cheaper than Claude Mythos Preview ($25.00/1M tokens).
For output processing, Claude Fable 5.2 ($40.00/1M tokens) is 3.1x cheaper than Claude Mythos Preview ($125.00/1M tokens).
In conclusion, Claude Mythos Preview is more expensive than Claude Fable 5.2.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Only Claude Fable 5.2 specifies input context (1,000,000 tokens). Only Claude Fable 5.2 specifies output context (128,000 tokens).
Input capabilities
Documented input modalities across available providers
Both Claude Fable 5.2 and Claude Mythos Preview support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Claude Fable 5.2
Claude Mythos Preview
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 5.2 was released on 2026-11-09, while Claude Mythos Preview's release date is not specified.
We can confirm Claude Fable 5.2's release timeline, but cannot make a direct age comparison without Claude Mythos Preview's release date.
Nov 9, 2026
3 days ago
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Knowledge Cutoff
When training data ends
Claude Fable 5.2 has a documented knowledge cutoff of 2026-06-01, while Claude Mythos Preview'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 Mythos Preview's cutoff date.
Jun 2026
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Provider Availability
Claude Fable 5.2 is available from Anthropic. Claude Mythos Preview is available from Anthropic.
Claude Fable 5.2
Claude Mythos Preview
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude Fable 5.2 and Claude Mythos Preview side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude Fable 5.2 vs Claude Mythos Preview.