Gemini 1.0 UltravsGemini 2.5 Pro
Google DeepMind vs Google DeepMind — Side-by-side model comparison
Head-to-Head Comparison
| Metric | Gemini 1.0 Ultra | Gemini 2.5 Pro |
|---|---|---|
| Provider | ||
| Arena Rank | — | #4 |
| Context Window | 32K | 1M |
| Input Pricing | Subscription-based/1M tokens | $1.25/1M tokens |
| Output Pricing | Subscription-based/1M tokens | $10.00/1M tokens |
| Parameters | Undisclosed | Undisclosed |
| Open Source | No | No |
| Best For | Complex reasoning, multimodal understanding | Long documents, multimodal, reasoning |
| Release Date | Feb 8, 2024 | — |
Gemini 1.0 Ultra
Gemini 1.0 Ultra was Google DeepMind's first frontier model, the first to exceed human expert performance on the MMLU benchmark. It demonstrated native multimodal capabilities across text, images, audio, and video. Gemini Ultra powered the rebranded Google One AI Premium plan and represented Google's full entry into the frontier AI model competition.
View Google DeepMind profile →Gemini 2.5 Pro
Gemini 2.5 Pro is Google DeepMind's most capable AI model, featuring an industry-leading 1 million token context window that can process entire books, codebases, or hours of video in a single request. Built with native multimodal capabilities, it understands text, images, audio, and video natively rather than through separate encoders. The model demonstrates exceptional performance on coding benchmarks, mathematical reasoning, and multi-step planning tasks. Its massive context window makes it uniquely suited for tasks involving large document analysis, repository-scale code understanding, and long video comprehension. Gemini 2.5 Pro also features built-in 'thinking' capabilities similar to reasoning models, allowing it to tackle complex problems with improved accuracy. Available through Google AI Studio and Vertex AI.
View Google DeepMind profile →Key Differences: Gemini 1.0 Ultra vs Gemini 2.5 Pro
Gemini 2.5 Pro supports a larger context window (1M), allowing it to process longer documents in a single request.
When to use Gemini 1.0 Ultra
- +Your use case involves complex reasoning, multimodal understanding
When to use Gemini 2.5 Pro
- +You need to process long documents (1M context)
- +Your use case involves long documents, multimodal, reasoning
The Verdict
Gemini 2.5 Pro wins our head-to-head comparison with 4 out of 5 category wins. It's the stronger choice for long documents, multimodal, reasoning, though Gemini 1.0 Ultra holds an edge in complex reasoning, multimodal understanding.
Last compared: March 2026 · Data sourced from public benchmarks and official pricing pages