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Claude Mythos Preview vs Gemini 3.8 Flash Cyber

Claude Mythos Preview and Gemini 3.8 Flash Cyber are closely matched at 55.1 and 42.4 on the LLM Stats Score.

Anthropic · Google · Updated for 2026

Which is better?

Claude Mythos Preview and Gemini 3.8 Flash Cyber are closely matched on the overall LLM Stats Score at 55.1 and 42.4.

In the 1 individual benchmarks reported for both models, Gemini 3.8 Flash Cyber wins 1; this is a narrower head-to-head signal than the composite indexes.

Based on current LLM Stats indexes, shared benchmarks, 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 Gemini 3.8 Flash Cyber

  • you value its reported benchmark strengths — it wins 1 of 1 exact shared results

At a glance

The differences that matter most.

Claude Mythos Preview
Anthropic
Gemini 3.8 Flash Cyber
Google
Core performance indexes
LLM Stats Score
55.1
#6
42.4
#46
Coding
44.9
#4
35.6
#25
Agents
36.2
#15
31.2
#27
Cost, coverage & limits
Benchmark wins
0 of 1
1 of 1
Input price
$25.00 / M
— / M
Output price
$125.00 / M
— / M
Context window
—
—

Individual benchmarks

16 reported for Claude Mythos Preview · 4 for Gemini 3.8 Flash Cyber

1 shared

Claude Mythos Preview outperforms in 0 benchmarks, while Gemini 3.8 Flash Cyber is better at 1 benchmark (CyberGym).

Gemini 3.8 Flash Cyber significantly outperforms across most benchmarks.

Fri Sep 04 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Input capabilities

Documented input modalities across available providers

Claude Mythos Preview supports multimodal inputs, whereas Gemini 3.8 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 3.8 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 3.8 Flash Cyber

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3.8 Flash Cyber was released on 2026-09-02, while Claude Mythos Preview's release date is not specified.

We can confirm Gemini 3.8 Flash Cyber's release timeline, but cannot make a direct age comparison without Claude Mythos Preview's release date.

Claude Mythos Preview

—

Gemini 3.8 Flash Cyber

Sep 2, 2026

1 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→

Judge for yourself.

Run your own prompts against Claude Mythos Preview and Gemini 3.8 Flash Cyber side-by-side, then vote on the output you prefer.

Claude Mythos Preview
✓ Preferred
Gemini 3.8 Flash Cyber
Open in Playground

FAQ

Common questions about Claude Mythos Preview vs Gemini 3.8 Flash Cyber.

Which is better, Claude Mythos Preview or Gemini 3.8 Flash Cyber?

Claude Mythos Preview and Gemini 3.8 Flash Cyber are closely matched on the LLM Stats Score at 55.1 and 42.4. Claude Mythos Preview is made by Anthropic and Gemini 3.8 Flash Cyber is made by Google. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Mythos Preview compare to Gemini 3.8 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 3.8 Flash Cyber scores Gray Swan IPI Benchmark: 94.0%, CyberGym: 86.2%, Google Real-world Vulnerability Discovery: 71.0%, CWE-Bench: 47.2%.

What are the main differences between Claude Mythos Preview and Gemini 3.8 Flash Cyber?

Key differences include LLM Stats Score (55.1 vs 42.4), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Mythos Preview and Gemini 3.8 Flash Cyber?

Claude Mythos Preview is developed by Anthropic and Gemini 3.8 Flash Cyber is developed by Google.

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