AI Observatory / Compare
broad multimodal work and premium operator tasks
OpenAI: GPT-4o vs Google: Gemini 2.5 Pro
OpenAI: GPT-4o and Google: Gemini 2.5 Pro are both tracked in Model Radar. This page focuses on broad multimodal work and premium operator tasks. Google: Gemini 2.5 Pro exposes the larger context window. Google: Gemini 2.5 Pro is cheaper on prompt input pricing.
128,000
OpenAI: GPT-4o ctx
1,048,576
Google: Gemini 2.5 Pro ctx
$2.50 / 1M
OpenAI: GPT-4o prompt
$1.25 / 1M
Google: Gemini 2.5 Pro prompt
01 / Table
Side-by-side snapshot.
The compare table stays neutral: price, context, modalities, and parameter support on one surface.
| Field | OpenAI: GPT-4o | Google: Gemini 2.5 Pro |
|---|---|---|
| Provider | OpenAI | |
| Input modalities | text, image, file | text, image, file, audio, video |
| Output modalities | text | text |
| Context length | 128,000 | 1,048,576 |
| Max completion tokens | 16,384 | 65,536 |
| Prompt price | $2.50 / 1M | $1.25 / 1M |
| Completion price | $10.00 / 1M | $10.00 / 1M |
| Supported parameters | frequency_penalty, logit_bias, logprobs, max_completion_tokens, max_tokens, presence_penalty, response_format, seed, stop, structured_outputs, temperature, tool_choice, tools, top_logprobs, top_p, web_search_options | include_reasoning, max_tokens, reasoning, response_format, seed, stop, structured_outputs, temperature, tool_choice, tools, top_p |
02 / Guidance
Best-for guidance.
These compare pages stay practical: what each model looks better suited for, based on the current catalog metadata.
OpenAI
$2.50 / 1M
OpenAI: GPT-4o
Cross-modal work, Coding workflows
Cross-modal work
Coding workflows
Google
$1.25 / 1M
Google: Gemini 2.5 Pro
Deep analysis, Coding workflows, Cross-modal work, Voice and audio
Deep analysis
Coding workflows
Cross-modal work
Voice and audio
03 / Colophon
Routes and exits.
Each compare page links back into the model detail pages and the public hub.