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Gemini 3.8 Flash Cyber vs GPT-5.6 Terra

Gemini 3.8 Flash Cyber and GPT-5.6 Terra are closely matched at 42.4 and 51.2 on the LLM Stats Score.

Google · OpenAI · Updated for 2026

Which is better?

Gemini 3.8 Flash Cyber and GPT-5.6 Terra are closely matched on the overall LLM Stats Score at 42.4 and 51.2.

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

Choose Gemini 3.8 Flash Cyber

  • you want the most recent training data — it shipped Sep 2026

Choose GPT-5.6 Terra

  • you want predictable pricing at $2.00/M input and $12.00/M output

At a glance

The differences that matter most.

Gemini 3.8 Flash Cyber
Google
GPT-5.6 Terra
OpenAI
Core performance indexes
LLM Stats Score
42.4
#46
51.2
#12
Coding
35.6
#25
42.4
#7
Agents
31.2
#27
37.8
#10
Cost, coverage & limits
Benchmark wins
—
—
Input price
— / M
$2.00 / M
Output price
— / M
$12.00 / M
Context window
—
1,050,000

Individual benchmarks

4 reported for Gemini 3.8 Flash Cyber · 45 for GPT-5.6 Terra

No common benchmarks found

Gemini 3.8 Flash Cyber and GPT-5.6 Terradon'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 GPT-5.6 Terra specifies input context (1,050,000 tokens). Only GPT-5.6 Terra specifies output context (128,000 tokens).

Google
Gemini 3.8 Flash Cyber
Input- tokens
Output- tokens
OpenAI
GPT-5.6 Terra
Input1,050,000 tokens
Output128,000 tokens
Fri Sep 04 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

GPT-5.6 Terra supports multimodal inputs, whereas Gemini 3.8 Flash Cyber does not.

GPT-5.6 Terra can handle both text and other forms of data like images, making it suitable for multimodal applications.

Gemini 3.8 Flash Cyber

Text
Images
Audio
Video

GPT-5.6 Terra

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.

Gemini 3.8 Flash Cyber

Proprietary

Closed source

GPT-5.6 Terra

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3.8 Flash Cyber was released on 2026-09-02, while GPT-5.6 Terra was released on 2026-07-09.

Gemini 3.8 Flash Cyber is 2 months newer than GPT-5.6 Terra.

Gemini 3.8 Flash Cyber

Sep 2, 2026

2 days ago

1mo newer
GPT-5.6 Terra

Jul 9, 2026

1 months ago

Knowledge Cutoff

When training data ends

GPT-5.6 Terra has a documented knowledge cutoff of 2026-02-16, while Gemini 3.8 Flash Cyber's cutoff date is not specified.

We can confirm GPT-5.6 Terra's training data extends to 2026-02-16, but cannot make a direct comparison without Gemini 3.8 Flash Cyber's cutoff date.

Gemini 3.8 Flash Cyber

—

GPT-5.6 Terra

Feb 2026

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Gemini 3.8 Flash Cyber and GPT-5.6 Terra side-by-side, then vote on the output you prefer.

Gemini 3.8 Flash Cyber
✓ Preferred
GPT-5.6 Terra
Open in Playground

FAQ

Common questions about Gemini 3.8 Flash Cyber vs GPT-5.6 Terra.

Which is better, Gemini 3.8 Flash Cyber or GPT-5.6 Terra?

Gemini 3.8 Flash Cyber and GPT-5.6 Terra are closely matched on the LLM Stats Score at 42.4 and 51.2. Gemini 3.8 Flash Cyber is made by Google and GPT-5.6 Terra is made by OpenAI. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Gemini 3.8 Flash Cyber compare to GPT-5.6 Terra in benchmarks?

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%. GPT-5.6 Terra scores Connectors: 100.0%, HealthBench Consensus: 95.1%, Search and Function-Calling: 94.6%, GPQA: 92.9%, Capture-the-Flag Challenges (Internal): 91.8%.

What are the context window sizes for Gemini 3.8 Flash Cyber and GPT-5.6 Terra?

Gemini 3.8 Flash Cyber supports an unknown number of tokens and GPT-5.6 Terra supports 1.1M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Gemini 3.8 Flash Cyber and GPT-5.6 Terra?

Key differences include LLM Stats Score (42.4 vs 51.2), multimodal support (no vs yes). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3.8 Flash Cyber and GPT-5.6 Terra?

Gemini 3.8 Flash Cyber is developed by Google and GPT-5.6 Terra is developed by OpenAI.

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