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Claude Sonnet 5.5 vs Gemini 3.8 Flash Cyber

Claude Sonnet 5.5 leads the LLM Stats Score 58.7 to 39.4.

Anthropic · Google · Updated for 2026

Which is better?

Claude Sonnet 5.5 leads the overall LLM Stats Score 58.7 to 39.4, ranking #2 overall.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Claude Sonnet 5.5

  • overall performance matters — it scores 58.7 and ranks #2 on LLM Stats
  • you want the most recent training data — it shipped Sep 2026

Choose Gemini 3.8 Flash Cyber

  • you are already invested in the Google ecosystem

At a glance

The differences that matter most.

Claude Sonnet 5.5
Anthropic
Gemini 3.8 Flash Cyber
Google
Core performance indexes
LLM Stats Score
58.7
#2
39.4
#69
Coding
48.3
#2
32.1
#49
Agents
43.2
#3
28.4
#51
Cost, coverage & limits
Benchmark wins
—
—
Input price
$2.00 / M
— / M
Output price
$10.00 / M
— / M
Context window
1,000,000
—

Individual benchmarks

47 reported for Claude Sonnet 5.5 · 4 for Gemini 3.8 Flash Cyber

No common benchmarks found

Claude Sonnet 5.5 and Gemini 3.8 Flash Cyberdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Claude Sonnet 5.5 specifies input context (1,000,000 tokens). Only Claude Sonnet 5.5 specifies output context (128,000 tokens).

Anthropic
Claude Sonnet 5.5
Input1,000,000 tokens
Output128,000 tokens
Google
Gemini 3.8 Flash Cyber
Input- tokens
Output- tokens
Mon Oct 19 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Claude Sonnet 5.5 supports multimodal inputs, whereas Gemini 3.8 Flash Cyber does not.

Claude Sonnet 5.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude Sonnet 5.5

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 Sonnet 5.5

Proprietary

Closed source

Gemini 3.8 Flash Cyber

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Sonnet 5.5 was released on 2026-09-28, while Gemini 3.8 Flash Cyber was released on 2026-09-02.

Claude Sonnet 5.5 is 1 month newer than Gemini 3.8 Flash Cyber.

Claude Sonnet 5.5

Sep 28, 2026

3 weeks ago

3w newer
Gemini 3.8 Flash Cyber

Sep 2, 2026

1 months ago

Knowledge Cutoff

When training data ends

Claude Sonnet 5.5 has a documented knowledge cutoff of 2026-06-01, while Gemini 3.8 Flash Cyber's cutoff date is not specified.

We can confirm Claude Sonnet 5.5's training data extends to 2026-06-01, but cannot make a direct comparison without Gemini 3.8 Flash Cyber's cutoff date.

Claude Sonnet 5.5

Jun 2026

Gemini 3.8 Flash Cyber

—

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Claude Sonnet 5.5 and Gemini 3.8 Flash Cyber side-by-side, then vote on the output you prefer.

Claude Sonnet 5.5
✓ Preferred
Gemini 3.8 Flash Cyber
Open in Playground

FAQ

Common questions about Claude Sonnet 5.5 vs Gemini 3.8 Flash Cyber.

Which is better, Claude Sonnet 5.5 or Gemini 3.8 Flash Cyber?

Claude Sonnet 5.5 leads the LLM Stats Score 58.7 to 39.4. Claude Sonnet 5.5 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 Sonnet 5.5 compare to Gemini 3.8 Flash Cyber in benchmarks?

Claude Sonnet 5.5 scores BenchCAD (with Python tool): 96.3%, ArXivMath (with tools): 95.2%, Global-MMLU: 92.1%, MILU: 91.6%, SWE-bench Multilingual: 90.3%. 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 context window sizes for Claude Sonnet 5.5 and Gemini 3.8 Flash Cyber?

Claude Sonnet 5.5 supports 1.0M tokens and Gemini 3.8 Flash Cyber supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Sonnet 5.5 and Gemini 3.8 Flash Cyber?

Key differences include LLM Stats Score (58.7 vs 39.4), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Sonnet 5.5 and Gemini 3.8 Flash Cyber?

Claude Sonnet 5.5 is developed by Anthropic and Gemini 3.8 Flash Cyber is developed by Google.

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