Gemini 2.5 Pro vs Gemini 3.5 Flash

Pick two tools from the same category to compare side-by-side.

	Gemini 2.5 Pro Google's frontier multimodal model with very long context.	Gemini 3.5 Flash Google's stable frontier model for sustained agentic and coding work, the current GA workhorse of the Gemini 3 family.
Category	model	model
Vendor type	commercial	commercial
Pricing	usage	usage
Strengths	+ Very long context + Native multimodal (image/video/audio) + Competitive pricing per token	+ Only stable GA model in the Gemini 3.x family as of June 2026; positioned for agentic execution and sub-agent deployment + 1M-token context window with thought preservation across multi-turn agent loops + Rich built-in tool ecosystem (search/maps grounding, code execution, file search, function calling)
Tradeoffs	− Tool-use ergonomics differ from OpenAI/Anthropic − Smaller agent-framework ecosystem	− Per Google docs: Computer Use is not supported at this moment (it was available in the Gemini 3 Flash Preview) − Output capped at 65k tokens, lower than competing flagships' 128k
Used in stacks	6	0