Claude Fable 5.1 vs Grok-3 Mini
Claude Fable 5.1 leads the LLM Stats Score 54.8 to 31.7. Grok-3 Mini is 57.1x cheaper per token.
Anthropic · xAI · Updated for 2026
Which is better?
Claude Fable 5.1 leads the overall LLM Stats Score 54.8 to 31.7, ranking #5 overall.
On price, Grok-3 Mini is roughly 57.1x 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 Grok-3 Mini
- cost matters — it's about 57.1x cheaper per token
At a glance
The differences that matter most.
Individual benchmarks
7 reported for Claude Fable 5.1 · 4 for Grok-3 Mini
Claude Fable 5.1 and Grok-3 Minidon'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) is 33.3x more expensive than Grok-3 Mini ($0.30/1M tokens).
For output processing, Claude Fable 5.1 ($50.00/1M tokens) is 100.0x more expensive than Grok-3 Mini ($0.50/1M tokens).
In conclusion, Claude Fable 5.1 is more expensive than Grok-3 Mini.*
* 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 Grok-3 Mini's 128,000 tokens. Claude Fable 5.1 can generate longer responses up to 128,000 tokens, while Grok-3 Mini is limited to 8,000 tokens.
Input capabilities
Documented input modalities across available providers
Both Claude Fable 5.1 and Grok-3 Mini support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Claude Fable 5.1
Grok-3 Mini
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 Grok-3 Mini was released on 2025-02-17.
Claude Fable 5.1 is 19 months newer than Grok-3 Mini.
Sep 1, 2026
1 days ago
1.5yr newerFeb 17, 2025
1.5 years ago
Knowledge Cutoff
When training data ends
Grok-3 Mini has a documented knowledge cutoff of 2024-11-17, while Claude Fable 5.1's cutoff date is not specified.
We can confirm Grok-3 Mini's training data extends to 2024-11-17, but cannot make a direct comparison without Claude Fable 5.1's cutoff date.
—
Nov 2024
Provider Availability
Claude Fable 5.1 is available from Anthropic. Grok-3 Mini is available from xAI.
Claude Fable 5.1
Grok-3 Mini
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude Fable 5.1 and Grok-3 Mini side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude Fable 5.1 vs Grok-3 Mini.