Gemini 2.5 Pro vs Gemini 3.5
2026 - Pricing, benchmarks, and use case comparison
Quick take
- •Both models come from Google DeepMind. Gemini 2.5 Pro targets higher capability; Gemini 3.5 is the faster, cheaper tier.
Specs comparison
| Gemini 2.5 Pro | Gemini 3.5 | |
|---|---|---|
| Provider | Google DeepMind | Google DeepMind |
| Type | Closed source | Closed source |
| Context window | 1M | 1M |
| Input / 1M tokens | $1.25 | TBA |
| Output / 1M tokens | $10.00 | TBA |
| Release date | 2025-03 | 2026-05 |
Benchmarks
| Benchmark | Gemini 2.5 Pro | Gemini 3.5 |
|---|---|---|
| GPQA Diamond | 86.4% | - |
| MMLU | 90.9% | - |
| SWE-bench Verified | 63.2% | - |
Scores sourced from official provider release posts.
Strengths
Gemini 2.5 Pro
- ✓Largest commercial context window (1M tokens)
- ✓Top benchmark scores on science and math
- ✓Strong multimodal: video, audio, images
- ✓Competitive pricing for the capability tier
- ✓Native Google Search and code execution tools
Gemini 3.5
- ✓Action-first architecture for agentic and multi-step workflows
- ✓1M token context window - largest in class
- ✓Powers Google Antigravity CLI for terminal-native coding
- ✓Native Workspace integration with autonomous task execution
- ✓Companion Gemini Omni handles anything-to-anything multimodal generation
Which should you choose?
Choose Gemini 2.5 Pro if you need...
- →Very long document analysis
- →Video and multimodal understanding
- →Scientific research tasks
- →Large codebase comprehension
Choose Gemini 3.5 if you need...
- →Agentic workflows requiring multi-step tool use
- →Large codebase comprehension and editing
- →Google Workspace automation
- →Long document and multimodal analysis