Activefrontierllm Proprietary

Claude Mythos Preview

by Anthropic· Released May 2025· Cutoff April 2025

Claude Mythos Preview is Anthropic's most advanced and capable model, designed for complex reasoning, creative tasks, and nuanced dialogue. It represents a significant leap in performance across coding, mathematics, and multilingual understanding, while maintaining Anthropic's focus on safety and alignment. This preview offers early access to the next generation of Claude's capabilities.

Official Site API Docs

Input cost

$15.00 per 1M tokens

Output cost

$75.00 per 1M tokens

Context window

200K tokens

Max output

8192 tokens

Modalities

textimage

License

proprietary

Capabilities

Function CallingVisionCode GenerationStreamingJSON ModeMultilingualExtended Thinking

Best For

Complex reasoning, advanced coding, and creative tasks requiring deep understanding and high accuracy.

Strengths

State-of-the-art reasoning and problem-solving
Exceptional coding performance across multiple languages
Strong multilingual capabilities
Advanced safety and alignment features
High accuracy on complex analytical tasks

Limitations

Higher cost compared to previous Claude models
Preview status may have occasional instability
Not yet available in all regions
Larger latency for very long contexts

Use Cases

Advanced software development and debugging

Complex mathematical and scientific research

Multilingual translation and content creation

Strategic analysis and decision support

Creative writing and storytelling

Data analysis and interpretation

Educational tutoring and explanation

Improvements Over Previous Model

Significantly improved reasoning and coding benchmarks over Claude 4 Sonnet
Extended context window from 200K to 200K tokens (same but with better recall)
Enhanced multilingual capabilities with better performance on non-English languages
New extended thinking mode for complex multi-step reasoning
Improved safety and alignment techniques

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