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Gemini 3.1 Flash Image vs GPT Image 2.5 Sunburst

Comparing Gemini 3.1 Flash Image and GPT Image 2.5 Sunburst across benchmarks, pricing, and capabilities.

Google · OpenAI · Updated for 2026

Which is better?

Gemini 3.1 Flash Image and GPT Image 2.5 Sunburst trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.

On price, Gemini 3.1 Flash Image is roughly 1.4x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

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

Choose Gemini 3.1 Flash Image

  • cost matters — it's about 1.4x cheaper per token

Choose GPT Image 2.5 Sunburst

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

At a glance

The differences that matter most.

Gemini 3.1 Flash Image
Google
GPT Image 2.5 Sunburst
OpenAI
Benchmark wins
—
—
Input price
$0.50 / M
$5.00 / M
Output price
$30.00 / M
$30.00 / M
Context window
65,536
—

Human preference

Human preference votes

Pricing Analysis

Price comparison per generated image

Gemini 3.1 Flash Image costs less

Gemini 3.1 Flash Image ($0.50/image) is 10.0x cheaper than GPT Image 2.5 Sunburst ($5.00/image).

Google
Gemini 3.1 Flash Image
Per image$0.50
Best providerGoogle
OpenAI
GPT Image 2.5 Sunburst
Per image$5.00
Best providerOpenAI
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License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Gemini 3.1 Flash Image

Proprietary

Closed source

GPT Image 2.5 Sunburst

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3.1 Flash Image was released on 2026-02-26, while GPT Image 2.5 Sunburst was released on 2026-09-08.

GPT Image 2.5 Sunburst is 6 months newer than Gemini 3.1 Flash Image.

Gemini 3.1 Flash Image

Feb 26, 2026

6 months ago

GPT Image 2.5 Sunburst

Sep 8, 2026

1 weeks ago

6mo newer

Provider Availability

Gemini 3.1 Flash Image is available from Google. GPT Image 2.5 Sunburst is available from OpenAI.

Gemini 3.1 Flash Image

google logo
Google
Input Price:Input: $0.50/1MOutput Price:Output: $30.00/1M

GPT Image 2.5 Sunburst

openai logo
OpenAI
Input Price:Input: $5.00/1MOutput Price:Output: $30.00/1M
* 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 3.1 Flash Image and GPT Image 2.5 Sunburst side-by-side, then vote on the output you prefer.

Gemini 3.1 Flash Image
✓ Preferred
GPT Image 2.5 Sunburst
Open in Playground

FAQ

Common questions about Gemini 3.1 Flash Image vs GPT Image 2.5 Sunburst.

Which is better, Gemini 3.1 Flash Image or GPT Image 2.5 Sunburst?

Gemini 3.1 Flash Image (Google) and GPT Image 2.5 Sunburst (OpenAI) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

Is Gemini 3.1 Flash Image cheaper than GPT Image 2.5 Sunburst?

Gemini 3.1 Flash Image is 10.0x cheaper for input tokens. Gemini 3.1 Flash Image costs $0.50/M input and $30.00/M output via google. GPT Image 2.5 Sunburst costs $5.00/M input and $30.00/M output via openai.

What are the context window sizes for Gemini 3.1 Flash Image and GPT Image 2.5 Sunburst?

Gemini 3.1 Flash Image supports 66K tokens and GPT Image 2.5 Sunburst 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 Gemini 3.1 Flash Image and GPT Image 2.5 Sunburst?

Key differences include input pricing ($0.50 vs $5.00/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3.1 Flash Image and GPT Image 2.5 Sunburst?

Gemini 3.1 Flash Image is developed by Google and GPT Image 2.5 Sunburst is developed by OpenAI.

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