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Gemini 3.8 Flash vs GPT-5.6 Cyber

Comparing Gemini 3.8 Flash and GPT-5.6 Cyber across benchmarks, pricing, and capabilities.

Google · OpenAI · Updated for 2026

Which is better?

Gemini 3.8 Flash and GPT-5.6 Cyber trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.

On price, Gemini 3.8 Flash is roughly 18.8x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Gemini 3.8 Flash also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.

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

Choose Gemini 3.8 Flash

  • cost matters — it's about 18.8x cheaper per token
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Sep 2026

Choose GPT-5.6 Cyber

  • you want predictable pricing at $12.50/M input and $75.00/M output

At a glance

The differences that matter most.

Gemini 3.8 Flash
Google
GPT-5.6 Cyber
OpenAI
Benchmark wins
—
—
Input price
$0.75 / M
$12.50 / M
Output price
$3.75 / M
$75.00 / M
Context window
1,048,576
400,000

Individual benchmarks

13 reported for Gemini 3.8 Flash · 0 for GPT-5.6 Cyber

No common benchmarks found

Gemini 3.8 Flash and GPT-5.6 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

Pricing Analysis

Price comparison per million tokens

Gemini 3.8 Flash costs less

For input processing, Gemini 3.8 Flash ($0.75/1M tokens) is 16.7x cheaper than GPT-5.6 Cyber ($12.50/1M tokens).

For output processing, Gemini 3.8 Flash ($3.75/1M tokens) is 20.0x cheaper than GPT-5.6 Cyber ($75.00/1M tokens).

In conclusion, GPT-5.6 Cyber is more expensive than Gemini 3.8 Flash.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Mon Sep 14 2026 • llm-stats.com
Google
Gemini 3.8 Flash
Input tokens$0.75
Output tokens$3.75
Best providerGoogle
OpenAI
GPT-5.6 Cyber
Input tokens$12.50
Output tokens$75.00
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Gemini 3.8 Flash accepts 1,048,576 input tokens compared to GPT-5.6 Cyber's 400,000 tokens. GPT-5.6 Cyber can generate longer responses up to 128,000 tokens, while Gemini 3.8 Flash is limited to 65,536 tokens.

Google
Gemini 3.8 Flash
Input1,048,576 tokens
Output65,536 tokens
OpenAI
GPT-5.6 Cyber
Input400,000 tokens
Output128,000 tokens
Mon Sep 14 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Gemini 3.8 Flash and GPT-5.6 Cyber support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Gemini 3.8 Flash

Text
Images
Audio
Video

GPT-5.6 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.

Gemini 3.8 Flash

Proprietary

Closed source

GPT-5.6 Cyber

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3.8 Flash was released on 2026-09-02, while GPT-5.6 Cyber was released on 2026-08-10.

Gemini 3.8 Flash is 1 month newer than GPT-5.6 Cyber.

Gemini 3.8 Flash

Sep 2, 2026

1 weeks ago

3w newer
GPT-5.6 Cyber

Aug 10, 2026

1 months ago

Knowledge Cutoff

When training data ends

Gemini 3.8 Flash has a knowledge cutoff of 2026-03-31, while GPT-5.6 Cyber has a cutoff of 2026-02-16.

Gemini 3.8 Flash has more recent training data (up to 2026-03-31), making it potentially better informed about events through that date compared to GPT-5.6 Cyber (2026-02-16).

Gemini 3.8 Flash

Mar 2026

1 mo newer
GPT-5.6 Cyber

Feb 2026

Provider Availability

Gemini 3.8 Flash is available from Google. GPT-5.6 Cyber is available from OpenAI.

Gemini 3.8 Flash

google logo
Google
Input Price:Input: $0.75/1MOutput Price:Output: $3.75/1M

GPT-5.6 Cyber

openai logo
OpenAI
Input Price:Input: $12.50/1MOutput Price:Output: $75.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

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

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

FAQ

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

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

Gemini 3.8 Flash (Google) and GPT-5.6 Cyber (OpenAI) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

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

Gemini 3.8 Flash scores Terminal-Bench 2.1: 89.4%, LVBench: 87.1%, CharXiv-R: 86.2%, LABBench2: 86.2%, DeepSWE 1.1: 73.7%.

Is Gemini 3.8 Flash cheaper than GPT-5.6 Cyber?

Gemini 3.8 Flash is 16.7x cheaper for input tokens. Gemini 3.8 Flash costs $0.75/M input and $3.75/M output via google. GPT-5.6 Cyber costs $12.50/M input and $75.00/M output via openai.

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

Gemini 3.8 Flash supports 1.0M tokens and GPT-5.6 Cyber supports 400K 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 and GPT-5.6 Cyber?

Key differences include context window (1.0M vs 400K), input pricing ($0.75 vs $12.50/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3.8 Flash and GPT-5.6 Cyber?

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

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