Model Comparison

Claude Mythos Preview vs Gemini 3.5 Flash CyberWhich is better in 2026?

Gemini 3.5 Flash Cyber significantly outperforms across most benchmarks.

Verdict: Claude Mythos Preview vs Gemini 3.5 Flash Cyber — which is better?

Claude Mythos Preview (by Anthropic) and Gemini 3.5 Flash Cyber (by Google) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Claude Mythos Preview outperforms in 0 benchmarks, while Gemini 3.5 Flash Cyber is better at 1 benchmark (CyberGym). Gemini 3.5 Flash Cyber significantly outperforms across most benchmarks.

Choose Claude Mythos Preview if…

  • you want predictable pricing at $25.00/M input and $125.00/M output

Choose Gemini 3.5 Flash Cyber if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Claude Mythos Preview outperforms in 0 benchmarks, while Gemini 3.5 Flash Cyber is better at 1 benchmark (CyberGym).

Gemini 3.5 Flash Cyber significantly outperforms across most benchmarks.

Tue Jul 21 2026 • llm-stats.com

Arena Performance

Human preference votes

Input Capabilities

Supported data types and modalities

Claude Mythos Preview supports multimodal inputs, whereas Gemini 3.5 Flash Cyber 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

Text
Images
Audio
Video

Gemini 3.5 Flash Cyber

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Claude Mythos Preview

Proprietary

Closed source

Gemini 3.5 Flash Cyber

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3.5 Flash Cyber was released on 2026-07-21, while Claude Mythos Preview's release date is not specified.

We can confirm Gemini 3.5 Flash Cyber's release timeline, but cannot make a direct age comparison without Claude Mythos Preview's release date.

Claude Mythos Preview

—

Gemini 3.5 Flash Cyber

Jul 21, 2026

0 days ago

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Anthropic
Supports multimodal inputs
Google
Higher CyberGym score (83.2% vs 83.1%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Claude Mythos Preview and Gemini 3.5 Flash Cyber side-by-side, then vote on the output you prefer.

Claude Mythos Preview
✓ Preferred
Gemini 3.5 Flash Cyber
Open in Playground
AI Model Comparison Table
Feature
Anthropic
Claude Mythos Preview
Google
Gemini 3.5 Flash Cyber

FAQ

Common questions about Claude Mythos Preview vs Gemini 3.5 Flash Cyber.

Which is better, Claude Mythos Preview or Gemini 3.5 Flash Cyber?

Gemini 3.5 Flash Cyber significantly outperforms across most benchmarks. Claude Mythos Preview is made by Anthropic and Gemini 3.5 Flash Cyber is made by Google. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude Mythos Preview compare to Gemini 3.5 Flash Cyber in benchmarks?

Claude Mythos Preview scores CyBench: 100.0%, USAMO25: 97.6%, GPQA: 94.6%, SWE-Bench Verified: 93.9%, CharXiv-R: 93.2%. Gemini 3.5 Flash Cyber scores CyberGym: 83.2%.

What are the main differences between Claude Mythos Preview and Gemini 3.5 Flash Cyber?

Key differences include multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Mythos Preview and Gemini 3.5 Flash Cyber?

Claude Mythos Preview is developed by Anthropic and Gemini 3.5 Flash Cyber is developed by Google.

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