Claude Mythos Preview vs Grok 4.7
Claude Mythos Preview and Grok 4.7 are closely matched at 54.8 and 48.5 on the LLM Stats Score. Grok 4.7 is 16.7x cheaper per token.
Anthropic · xAI · Updated for 2026
Which is better?
Claude Mythos Preview and Grok 4.7 are closely matched on the overall LLM Stats Score at 54.8 and 48.5.
In the 1 individual benchmarks reported for both models, Claude Mythos Preview wins 1; this is a narrower head-to-head signal than the composite indexes.
On price, Grok 4.7 is roughly 16.7x 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 Mythos Preview
- your work emphasizes reasoning — it leads those capability indexes
- you value its reported benchmark strengths — it wins 1 of 1 exact shared results
Choose Grok 4.7
- cost matters — it's about 16.7x cheaper per token
At a glance
The differences that matter most.
Individual benchmarks
16 reported for Claude Mythos Preview · 23 for Grok 4.7
Claude Mythos Preview outperforms in 1 benchmarks (CyberGym), while Grok 4.7 is better at 0 benchmarks.
Claude Mythos Preview 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 Mythos Preview ($25.00/1M tokens) is 12.5x more expensive than Grok 4.7 ($2.00/1M tokens).
For output processing, Claude Mythos Preview ($125.00/1M tokens) is 20.8x more expensive than Grok 4.7 ($6.00/1M tokens).
In conclusion, Claude Mythos Preview is more expensive than Grok 4.7.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Only Grok 4.7 specifies input context (500,000 tokens).
Input capabilities
Documented input modalities across available providers
Both Claude Mythos Preview and Grok 4.7 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Claude Mythos Preview
Grok 4.7
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
Grok 4.7 was released on 2026-09-21, while Claude Mythos Preview's release date is not specified.
We can confirm Grok 4.7's release timeline, but cannot make a direct age comparison without Claude Mythos Preview's release date.
—
Sep 21, 2026
0 days ago
Knowledge Cutoff
When training data ends
Grok 4.7 has a documented knowledge cutoff of 2026-06-01, while Claude Mythos Preview's cutoff date is not specified.
We can confirm Grok 4.7's training data extends to 2026-06-01, but cannot make a direct comparison without Claude Mythos Preview's cutoff date.
—
Jun 2026
Provider Availability
Claude Mythos Preview is available from Anthropic. Grok 4.7 is available from xAI.
Claude Mythos Preview
Grok 4.7
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude Mythos Preview and Grok 4.7 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude Mythos Preview vs Grok 4.7.