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Gemini 2.5 Pro Preview 05-06 vs GPT-5.5 Pro

A side-by-side comparison of two multimodal models — real specs, pricing, strengths and weaknesses, and a clear verdict on which to choose. Kept current by our agents.

Quick verdict: which should you choose?

Choose Gemini 2.5 Pro Preview 05-06 if you need

  • Choose GPT-5.5 Pro if you need seamless multimodal integration of files, images, and text.
  • Choose GPT-5.5 Pro if you need the largest available context window at 1,050,000 tokens.
  • Choose GPT-5.5 Pro if you need strong reasoning focused on extended text and image inputs.

Choose GPT-5.5 Pro if you need

  • Choose Gemini 2.5 Pro Preview 05-06 if you need native support for audio and video alongside text and images.
  • Choose Gemini 2.5 Pro Preview 05-06 if you need dramatically lower output pricing at $10 per million tokens.
  • Choose Gemini 2.5 Pro Preview 05-06 if you need flexible cross-modal reasoning across more input types.
  • Choose Gemini 2.5 Pro Preview 05-06 if you need broad file handling in a preview-stage model.

Verdict

Gemini 2.5 Pro Preview 05-06 leads on cost and modality breadth while GPT-5.5 Pro edges out on context size and seamless integration. GPT-5.5 Pro's $180/M output price is 18x higher than Gemini's $10/M despite nearly identical context windows (1.05M vs 1.048M tokens). Gemini supports audio and video natively where GPT-5.5 Pro is limited to files, images, and text.

Gemini 2.5 Pro Preview 05-06 vs GPT-5.5 Pro: side by side

SpecGemini 2.5 Pro Preview 05-06GPT-5.5 ProWinner
IntelligenceTie
Output speedTie
Output price$10.00/1M$180.00/1MGemini 2.5 Pro Preview 05-06
Context1049K1050KGPT-5.5 Pro
ParamsTie
ProviderGoogleOpenAITie

Detailed analysis

Pricing

Winner: Gemini 2.5 Pro Preview 05-06

Gemini 2.5 Pro Preview 05-06 costs $10 per million output tokens. GPT-5.5 Pro costs $180 per million output tokens, making Gemini 18 times cheaper on price.

Modalities Supported

Winner: Gemini 2.5 Pro Preview 05-06

Gemini 2.5 Pro Preview 05-06 natively handles text, images, audio, video and files. GPT-5.5 Pro supports only files, images, and text with no audio or video.

Context Window

Winner: GPT-5.5 Pro

GPT-5.5 Pro provides 1,050,000 tokens of context. Gemini 2.5 Pro Preview 05-06 provides 1,048,576 tokens, giving GPT-5.5 Pro a marginal size advantage.

Integration & Reasoning

Winner: Tie

GPT-5.5 Pro emphasizes seamless multimodal integration and strong reasoning over extended inputs. Gemini 2.5 Pro Preview 05-06 emphasizes strong cross-modal reasoning and flexible file handling.

Gemini 2.5 Pro Preview 05-06

Pros

  • +Very large context window
  • +Native support for multiple modalities
  • +Strong cross-modal reasoning

Cons

  • Preview version may show variability
  • High resource use with maximum context
  • Occasional modality-specific inconsistencies
Full Gemini 2.5 Pro Preview 05-06 review →

GPT-5.5 Pro

Pros

  • +Very large context window
  • +Native support for files, images, and text
  • +Seamless multimodal integration

Cons

  • High resource use with maximum context
  • No audio or video modalities
  • Potential latency on very long inputs
Full GPT-5.5 Pro review →

Summary: Gemini 2.5 Pro Preview 05-06 vs GPT-5.5 Pro

Select GPT-5.5 Pro when maximum context size and polished text-image integration outweigh cost. Select Gemini 2.5 Pro Preview 05-06 when lower price and support for audio plus video are priorities.

Frequently asked questions

Gemini 2.5 Pro Preview 05-06 at $10 per million output tokens versus GPT-5.5 Pro at $180 per million.

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