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GPT Image 2.5 Sunburst vs Grok Imagine Image Pro

Comparing GPT Image 2.5 Sunburst and Grok Imagine Image Pro across benchmarks, pricing, and capabilities.

OpenAI · xAI · Updated for 2026

Which is better?

GPT Image 2.5 Sunburst and Grok Imagine Image Pro trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.

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

Choose GPT Image 2.5 Sunburst

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

Choose Grok Imagine Image Pro

  • you are already invested in the xAI ecosystem

At a glance

The differences that matter most.

GPT Image 2.5 Sunburst
OpenAI
Grok Imagine Image Pro
xAI
Benchmark wins
—
—
Input price
$5.00 / M
— / M
Output price
$30.00 / M
— / M
Context window
—
131,072

Human preference

Human preference votes

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

GPT Image 2.5 Sunburst

Proprietary

Closed source

Grok Imagine Image Pro

Proprietary

Closed source

Release Timeline

When each model was launched

GPT Image 2.5 Sunburst was released on 2026-09-08, while Grok Imagine Image Pro was released on 2026-02-01.

GPT Image 2.5 Sunburst is 7 months newer than Grok Imagine Image Pro.

GPT Image 2.5 Sunburst

Sep 8, 2026

1 weeks ago

7mo newer
Grok Imagine Image Pro

Feb 1, 2026

7 months ago

Provider Availability

GPT Image 2.5 Sunburst is available from OpenAI. Grok Imagine Image Pro is available from xAI.

GPT Image 2.5 Sunburst

openai logo
OpenAI
Input Price:Input: $5.00/1MOutput Price:Output: $30.00/1M

Grok Imagine Image Pro

xai logo
xAI
* Prices shown are per million tokens

Outputs Comparison

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Judge for yourself.

Run your own prompts against GPT Image 2.5 Sunburst and Grok Imagine Image Pro side-by-side, then vote on the output you prefer.

GPT Image 2.5 Sunburst
✓ Preferred
Grok Imagine Image Pro
Open in Playground

FAQ

Common questions about GPT Image 2.5 Sunburst vs Grok Imagine Image Pro.

Which is better, GPT Image 2.5 Sunburst or Grok Imagine Image Pro?

GPT Image 2.5 Sunburst (OpenAI) and Grok Imagine Image Pro (xAI) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

What are the context window sizes for GPT Image 2.5 Sunburst and Grok Imagine Image Pro?

GPT Image 2.5 Sunburst supports an unknown number of tokens and Grok Imagine Image Pro supports 131K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between GPT Image 2.5 Sunburst and Grok Imagine Image Pro?

Key differences include multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT Image 2.5 Sunburst and Grok Imagine Image Pro?

GPT Image 2.5 Sunburst is developed by OpenAI and Grok Imagine Image Pro is developed by xAI.

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