Claude Mythos Preview vs DeepSeek-V4-Pro-0813
Both models are evenly matched across the benchmarks. DeepSeek-V4-Pro-0813 is 92.0x cheaper per token.
Anthropic · DeepSeek · Updated for 2026
Which is better?
Claude Mythos Preview outperforms in 1 benchmarks (Humanity's Last Exam), while DeepSeek-V4-Pro-0813 is better at 1 benchmark (CyberGym). Both models are evenly matched across the benchmarks.
On price, DeepSeek-V4-Pro-0813 is roughly 92.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Based on current benchmark, pricing, and model metadata for 2026.
Choose Claude Mythos Preview
- you want predictable pricing at $25.00/M input and $125.00/M output
Choose DeepSeek-V4-Pro-0813
- cost matters — it's about 92.0x cheaper per token
- you need open weights you can self-host or fine-tune
At a glance
The differences that matter most.
Performance Benchmarks
Comparative analysis across standard metrics
Claude Mythos Preview outperforms in 1 benchmarks (Humanity's Last Exam), while DeepSeek-V4-Pro-0813 is better at 1 benchmark (CyberGym).
Both models are evenly matched across the benchmarks.
Arena Performance
Playground indexes and blind preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Claude Mythos Preview ($25.00/1M tokens) is 57.5x more expensive than DeepSeek-V4-Pro-0813 ($0.43/1M tokens).
For output processing, Claude Mythos Preview ($125.00/1M tokens) is 143.7x more expensive than DeepSeek-V4-Pro-0813 ($0.87/1M tokens).
In conclusion, Claude Mythos Preview is more expensive than DeepSeek-V4-Pro-0813.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Only DeepSeek-V4-Pro-0813 specifies input context (1,048,576 tokens). Only DeepSeek-V4-Pro-0813 specifies output context (393,216 tokens).
Input Capabilities
Supported data types and modalities
Claude Mythos Preview supports multimodal inputs, whereas DeepSeek-V4-Pro-0813 does not.
Claude Mythos Preview can handle both text and other forms of data like images, making it suitable for multimodal applications.
Claude Mythos Preview
DeepSeek-V4-Pro-0813
License
Usage and distribution terms
Claude Mythos Preview is licensed under a proprietary license, while DeepSeek-V4-Pro-0813 uses MIT.
License differences may affect how you can use these models in commercial or open-source projects.
Proprietary
Closed source
MIT
Open weights
Release Timeline
When each model was launched
DeepSeek-V4-Pro-0813 was released on 2026-08-13, while Claude Mythos Preview's release date is not specified.
We can confirm DeepSeek-V4-Pro-0813's release timeline, but cannot make a direct age comparison without Claude Mythos Preview's release date.
—
Aug 13, 2026
1 weeks ago
Knowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
Claude Mythos Preview is available from Anthropic. DeepSeek-V4-Pro-0813 is available from DeepSeek, DeepInfra, Novita, Together.
Claude Mythos Preview
DeepSeek-V4-Pro-0813
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude Mythos Preview and DeepSeek-V4-Pro-0813 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude Mythos Preview vs DeepSeek-V4-Pro-0813.